Node.js is an open-source cross-platform JavaScript runtime environment that allows developers to easily deploy JavaScript based applications and services. Node.js is built on Chrome's V8 JavaScript engine and can be used to create server-side applications that are secure, scalable, fast and efficient. Node.js Developers have the skills to build secure and performant web applications that can handle large volumes of data in an efficient way.

A Node.js Developer is a skilled programmer with experience in building modern web applications that employ technologies such as Node.js, JavaScript, HTML5, and CSS3. Node.js Developers are responsible for developing server-side web applications, creating user interfaces for websites or web applications, and developing APIs for servers or browsers. These developers also create custom plugins and modules that extend the functionality of existing applications or websites.

Using Freelancer.com to recruit Node.js Developers highly skilled at developing web applications is a great way of getting the job done quickly and efficiently.

Here’s some projects that our expert node.js Developers made real:

  • Creating websites with complex functionalities
  • Hosting applications on cloud environments
  • Extracting text from scanned documents or images
  • Building web scrapers
  • Setting up chatbot integrated with OpenAI API
  • Developing user interfaces for websites
  • Developing APIs for server/clients
  • Setting up projects in PC

If you're searching for a Node.js Developer to join your team, hiring an experienced freelancer on Freelancer.com would be an ideal choice for completing your project quickly and efficiently with high quality results. It takes only minutes to post a project; after that you will be able to connect to potential freelancers who have the skills and experience needed for your projects. Hire a freelancer on Freelancer now!

Από 291,451 αξιολογήσεις, οι πελάτες αξιολογούν τους node.js Developers με 4.9 από 5 αστέρια
Πρόσλαβε node.js Developers

Node.js is an open-source cross-platform JavaScript runtime environment that allows developers to easily deploy JavaScript based applications and services. Node.js is built on Chrome's V8 JavaScript engine and can be used to create server-side applications that are secure, scalable, fast and efficient. Node.js Developers have the skills to build secure and performant web applications that can handle large volumes of data in an efficient way.

A Node.js Developer is a skilled programmer with experience in building modern web applications that employ technologies such as Node.js, JavaScript, HTML5, and CSS3. Node.js Developers are responsible for developing server-side web applications, creating user interfaces for websites or web applications, and developing APIs for servers or browsers. These developers also create custom plugins and modules that extend the functionality of existing applications or websites.

Using Freelancer.com to recruit Node.js Developers highly skilled at developing web applications is a great way of getting the job done quickly and efficiently.

Here’s some projects that our expert node.js Developers made real:

  • Creating websites with complex functionalities
  • Hosting applications on cloud environments
  • Extracting text from scanned documents or images
  • Building web scrapers
  • Setting up chatbot integrated with OpenAI API
  • Developing user interfaces for websites
  • Developing APIs for server/clients
  • Setting up projects in PC

If you're searching for a Node.js Developer to join your team, hiring an experienced freelancer on Freelancer.com would be an ideal choice for completing your project quickly and efficiently with high quality results. It takes only minutes to post a project; after that you will be able to connect to potential freelancers who have the skills and experience needed for your projects. Hire a freelancer on Freelancer now!

Από 291,451 αξιολογήσεις, οι πελάτες αξιολογούν τους node.js Developers με 4.9 από 5 αστέρια
Πρόσλαβε node.js Developers

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    227 εργασίες βρέθηκαν
    Honey Talk. I need A 1V1 Calling dating app.
    6 μέρες left
    Βεβαιωμένο

    I need A 1V1 Calling dating app. I purchase a Flutter App UI from codecanyon. The Work is Create Admin Panel UI Make It functional Create API Connect With App Create Database Modifi App UI According I need Demo Admin Panel ( I need Like This ) Admin panel : Account:admin   Password:123abc Phone number:+447873398220 Demo App ( I need Like This ) 1) 2) payment milestone:- Admin Panel UI - 10% App UI - 10% Create API - 20% Create Database - 10% Admin panel Using Node JS - 30% Make Flutter App functional And Connect Admin panel And API - 10% All Testing Done And Ready to production - 10% Satisfaction:- 1. Admin Panel UI - Make According Demo And Submit Freelancer 2. App UI - Make According Demo And Submit Freelancer 3. Create API - All Api Perfect Work Submit Freelencer 4. Cr...

    €933 Average bid
    €933 Μέση Προσφορά
    55 προσφορές

    Our mobile app is already live on a staging domain, built with React Native, Node.js (Express) and MongoDB. I now need a full-stack developer who can dedicate the next seven days to finish three key items and move everything to our official domain. 1) Community auto-membership Every new registrant should be placed into the correct in-app community automatically when their professional email domain matches one that we map in the database. No manual steps—just detect, assign and save. 2) OTP email verification Before the first login the user must confirm ownership of that professional address. Generate a one-time six-digit code, send it via email, and allow a single attempt window with proper resend limits and expiry logic. 3) Production deployment The existing backend and adm...

    €97 Average bid
    €97 Μέση Προσφορά
    51 προσφορές

    I want to turn my “my tool sharing” idea into a live web platform, handling everything from the first pixel of the interface to the last line of server code. At its heart the site needs one thing done perfectly: users must be able to list their tools and let others search for them quickly and intuitively. This first phase focuses only on that listing-and-search workflow. Reviews, ratings, booking calendars, and other extras can wait, so please build the architecture with clean separation of concerns to make those future add-ons painless. You are free to choose a modern stack—React, Vue, or vanilla JS for the front; Node, Django, Laravel, or a similar framework for the back—so long as the code is well-documented, componentised, and backed by a reliable database su...

    €250 Average bid
    €250 Μέση Προσφορά
    64 προσφορές

    We are looking for an experienced AI/Backend Engineer (or small team) to help design and implement a foundational setup for an enterprise “Agentic AI” goal is to enable a prompt-based interface where business users can ask questions and trigger actions across internal risk management and document systems through a governed API layer. This is NOT a chatbot UI project focuses on backend architecture, AI orchestration, and secure enterprise integration. Target application includes IBM OpenPages SaaS (GRC) accessed via REST APIs. The first phase will implement a proof-of-concept that allows an AI agent to retrieve and update structured records using approved APIs via a secure middleware service. Scope of Work (Phase-1: Foundational Setup) Build a secure middleware API servic...

    €88 Average bid
    €88 Μέση Προσφορά
    12 προσφορές

    Project Name = "Follow me" We are a sport timing company for equestrian sports. So we have our live site on equestre.zeitmessungen.ch. We want it sends fans a WhatsApp notification when the selected rider or horse starts. To select Rider or Horse should be 2 modes: 1. on our live site you have to add a button for each horse and each rider. A window opens and the fan can enter his WhatsApp number. and the rider or horse is registered. 2. on the database of our federation the fan can search about a horse or rider. once found, the fan can enter their WhatsApp number. For this you have to add a seperate link at the root of the live site. From now each time the rider or horse comes to start and the fan receive a WhatsApp with text "Your favorite Horse/Rider is now on start an...

    €396 Average bid
    €396 Μέση Προσφορά
    122 προσφορές

    The developer should build a cross-platform AI-powered IT Help Desk agent and management system that supports Windows, Linux, and macOS. The system must include a backend API (preferably in Python FastAPI or Node.js) to handle ticket management, device registration, and command distribution, along with a secure database (PostgreSQL) and an optional vector database for AI knowledge retrieval. The agent itself should be written in a compiled language like Go for cross-platform deployment, capable of registering devices, reporting system info and heartbeat, detecting missing patches, restarting services, and executing safe commands remotely. The AI component should analyze incoming IT tickets, automatically suggest fixes, and optionally execute auto-remediation commands when safe. All communi...

    €425 Average bid
    €425 Μέση Προσφορά
    115 προσφορές
    Full-Feature Online Mall Development
    6 μέρες left
    Βεβαιωμένο

    We are developing a complete marketplace ecosystem that includes: Website ( (React Framework) Mobile App buyer and seller (iOS & Android) ( React native ) Store Owner Dashboards (React (or ) Advanced Admin Control Panel (React (or ) Digital Promotional Magazine (PDF System) Backend (Node.js (NestJS or Express) Our goal is to build a scalable digital mall where businesses can sell wholesale and retail products while benefiting from powerful marketing and management tools. Platform Owner (Admin) Features As the platform owner, you will have full strategic and financial control. Coupons & Campaign Management Create global coupon codes (fixed or percentage) Apply coupons to specific stores or categories Control expiration dates and usage limits Feature selected stores in disco...

    €1999 Average bid
    €1999 Μέση Προσφορά
    309 προσφορές

    Descripción: Hola, busco un desarrollador web/programador por horas para trabajar mano a mano conmigo en la mejora de un sistema de gestión para mi negocio de venta de tecnología. La dinámica de trabajo es única: 1. Trabajaremos en conjunto: Tú, yo y mi asistente de IA (Gemini Advanced). 2. La IA generará gran parte de la lógica, consultas de Base de Datos y fragmentos de código. 3. Tu trabajo será: Integrar ese código, verificar que funcione, corregir errores de sintaxis, conectar el backend con el frontend y asegurar que la base de datos registre bien la información. 4. No necesito que escribas todo desde cero, necesito que seas el "arquitecto" que ensambla las piezas que la IA y yo ...

    €17 / hr Average bid
    €17 / hr Μέση Προσφορά
    42 προσφορές

    Our MVP is live and stable; the only piece missing before launch is the licensing layer. I already have the logic mapped out for both geographical and categorical tiers, but I need the code that enforces those rules inside Odoo and keeps it in sync with our MEAN-based front end and the existing Python services. Here is what has to happen: • Build or extend an Odoo module that talks to our Node.js API, receives license-creation calls, and stores the resulting keys and usage limits. • Expose secure REST endpoints (or use RPC if you prefer) so the Angular front end can validate a license and retrieve project entitlements in real time. • Make sure the Python micro-services that run our billing routines can both read and write to the same licensing data, preventing race co...

    €919 Average bid
    €919 Μέση Προσφορά
    158 προσφορές
    Web Wrestling Tournament Manager
    6 μέρες left
    Βεβαιωμένο

    I need a web-based application that lets me run every aspect of a high-school wrestling tournament from one screen. The core must cover participant registration, automated bracketing and seeding, match scheduling, real-time score tracking, live team scoring, and on-demand printing of brackets, bout sheets, and final results. Here’s how I picture the flow: • Coaches register athletes online, selecting weight classes and entering roster data. • The system seeds each bracket automatically yet allows manual tweaks when necessary. • Matches are scheduled across multiple mats and rounds, with clear matside displays. • Scores are entered live; individual results immediately roll into cumulative team standings. • At any point, I can print clean, ready-to-po...

    €402 Average bid
    €402 Μέση Προσφορά
    227 προσφορές

    My team needs a seasoned full-stack developer to step in as a consultant who can transfer knowledge rather than write code. I’m specifically looking for someone confident across frontend, backend, and database layers who can translate that depth into clear, structured technical training sessions. Your core mission is to design and deliver training that sharpens our developers’ practical skills. Expect to break down real project scenarios, walk through architectural decisions, explain code quality best practices, and answer ad-hoc questions as they come up. We work mostly with JavaScript/TypeScript, React, Node.js, and PostgreSQL, so fluency in these (or closely related stacks) will help you connect quickly with the team. Deliverables • A short training plan outlining top...

    €45 / hr Average bid
    €45 / hr Μέση Προσφορά
    81 προσφορές

    I’m searching for production-ready AI agents I can roll out across several verticals—specifically Healthcare, Real Estate, E-commerce, Blockchain, Crypto, and Social Media. Each solution must already be live somewhere so I can see it operating in real time before we move forward. The core requirements are straightforward: the agent needs to run in a browser, accept its own knowledge base or document set for context, and ship with source code plus clear documentation. I’m also expecting help getting the code stood up in a SaaS or on-prem environment. I’m flexible on architecture; whether you built it around OpenAI, Claude, Llama, FastAPI, Node.js, Pinecone, FAISS, or Weaviate doesn’t matter as long as it performs reliably at scale. To keep things simple, here...

    €8 / hr Average bid
    €8 / hr Μέση Προσφορά
    12 προσφορές

    I’m searching for production-ready AI agents I can roll out across several verticals—specifically Healthcare, Real Estate, E-commerce, Blockchain, Crypto, and Social Media. Each solution must already be live somewhere so I can see it operating in real time before we move forward. The core requirements are straightforward: the agent needs to run in a browser, accept its own knowledge base or document set for context, and ship with source code plus clear documentation. I’m also expecting help getting the code stood up in a SaaS or on-prem environment. I’m flexible on architecture; whether you built it around OpenAI, Claude, Llama, FastAPI, Node.js, Pinecone, FAISS, or Weaviate doesn’t matter as long as it performs reliably at scale. To keep things simple, here...

    €8 / hr Average bid
    €8 / hr Μέση Προσφορά
    10 προσφορές
    Retell AI - Zenbooker API Bridge
    6 μέρες left
    Βεβαιωμένο

    What we’re building: A backend “bridge” that lets Retell AI automatically book, reschedule, and cancel appointments in Zenbooker. Must-have outcomes: When a caller tells Retell AI to book, reschedule, or cancel, the integration must: 1. Create / update / cancel the correct appointment in Zenbooker 2. Trigger Zenbooker’s built-in confirmation email automatically 3. Handle reschedules + cancellations cleanly (no broken states, no double-booking) Business rules (optional, recommend what makes sense): - Technician assignment - Blackout windows (days/hours we don’t book) - Lead-time rules (example: no same-day bookings after 3pm) - Service-area limits (by zip code or radius) Please flag which rules you recommend and why. Tech preferences - Use any stack you p...

    €140 Average bid
    €140 Μέση Προσφορά
    100 προσφορές
    Need a full-stack Web3 developer
    6 μέρες left
    Βεβαιωμένο

    Hi I will share the details with the shortlisted candidates. thanks

    €381 Average bid
    €381 Μέση Προσφορά
    51 προσφορές

    I’m setting up a central repository where each of my subscribed clients—schools, companies, public bodies and similar organisations—can log in over the internet to view, upload and download their own estate-related and compliance documents such as surveys, inspection reports and certificates. Editing in the browser isn’t required; the goal is a “read, upload, download” portal that keeps every file in its original form. Here’s what I need built: • A relational database (SQL or comparable) that stores the file-metadata and user accounts. • A clean web interface that works on desktop and mobile, served from my own on-prem server. • Username-and-password authentication with session timeout and password-reset functions. • Rol...

    €2536 Average bid
    €2536 Μέση Προσφορά
    283 προσφορές
    Plaid + Chase Connectivity Issue via API
    6 μέρες left
    Βεβαιωμένο

    Plaid + Chase Connectivity Issue via API Plaid + Chase OAuth Integration — "Invalid Credentials" After Successful OAuth Flow The Problem: We have a production Plaid integration (Node.js/Express) that connects bank accounts via Plaid Link. American Express and Capital One connect and sync perfectly. Chase fails every time with "Username or password incorrect" AFTER the OAuth flow completes successfully. The Flow: 1. User clicks Connect Bank → Plaid Link opens 2. User selects Chase → Plaid fires OPEN_OAUTH event 3. User redirects to Chase's website and logs in successfully 4. Chase redirects back to our app with oauth_state_id 5. Plaid Link re-opens with receivedRedirectUri 6. Plaid shows "Username or password incorrect" — connectio...

    €30 / hr Average bid
    €30 / hr Μέση Προσφορά
    201 προσφορές

    Tenho hoje o ChatPion funcionando, porém preciso levá-lo a outro nível. Estou aberto a duas vias: aprimorar diretamente o ChatPion ou, caso seja tecnicamente mais simples, desenvolver um novo chatbot do zero para minhas páginas do Facebook. O que é indispensável • Envio de mensagens em massa sem limites artificiais, inclusive para várias páginas simultâneas. • Integração com outras plataformas (APIs externas, CRM, e-commerce ou o que for necessário). • Respostas automáticas mais inteligentes, capazes de entender variações de texto e entregar conteúdo personalizado. Além disso, quero um painel central onde eu consiga disparar campanhas, alterar configu...

    €375 Average bid
    €375 Μέση Προσφορά
    57 προσφορές
    Redeploy BDonor Web App
    6 μέρες left

    I have the complete source code for BDonor, a live web-app that is currently down because Clerk Auth hit its “100 user limit.” The break means I can’t even reach the admin panel, so I need a clean redeployment from the ground up. Right now the site is hosted on Vercel, but I’m open to keeping it there or shifting to something like AWS or Google Cloud if that would eliminate the Clerk ceiling and future-proof the project. I’m not certain which environment variables, build flags, or third-party hooks are mission-critical, so I’ll rely on your guidance to audit the repo, document what matters, and carry it over correctly. Key objectives • Spin up a fresh production instance under my own new accounts (hosting, auth, database, any other services). &b...

    €66 Average bid
    €66 Μέση Προσφορά
    23 προσφορές
    Full-Stack Web3 Engineer (USDC)
    6 μέρες left
    Βεβαιωμένο

    Design The Role We are looking for a Full Stack Engineer to take full ownership of building a non-custodial crypto payment gateway for USDC on Ethereum. You will not just be "writing code" from a ticket; you will be responsible for the entire delivery, including infrastructure, security, database design, and the admin dashboard. You are effectively acting as the Founding Engineer/CTO for this build. You must be comfortable making architectural decisions, setting up CI/CD, and securing a financial application. The System A compliant, on-chain payment rail that: Generates unique, one-time deposit addresses for users (HD Wallets). Detects incoming USDC transactions (Chain Indexing). Sweeps funds to a central treasury using EIP-3009 (Gasless Permits) to minimize ETH usage. P...

    €3544 Average bid
    €3544 Μέση Προσφορά
    29 προσφορές

    I want to launch a fully-featured, cloud-hosted lottery platform built on a hardened Node.js backend with a reliable database layer. New players will sign up with a classic email-and-password flow, then complete KYC before they can fund their wallet or join a draw. The exact KYC data points can be finalised together, but the process must be seamless and compliant. Core flow • A user tops up an internal wallet via PayPal (gaming category enabled), buys entries, and watches their balance update in real time. • On draw day a server-side, provably-fair randomiser selects winners; every draw, ticket purchase, and payout is written to an immutable audit log. • From my side I need an admin dashboard that shows live player stats, transaction history, and lets me trigger or sc...

    €67 Average bid
    €67 Μέση Προσφορά
    11 προσφορές
    HeyKIVI AI Video Platform: Enhancement and Maintenance
    6 μέρες left
    Βεβαιωμένο

    Project: HeyKIVI – AI video communication platform (MVP completed), now moving into post-MVP scale-out. Main goals: Implement multi-tenancy + feature entitlement (customers only see their own use cases/features) based on Admin UI. Deliver continuous new use cases (frontend tile + backend workflow + HeyGen integration). Provide ongoing platform maintenance (bugfixing, hardening, small improvements). Pricing model: Fixed package for multi-tenancy/entitlements. Flat rate per new use case (continuous stream, varies by customer). Hourly rate for anything beyond these two fixed scopes. Tech stack: TypeScript, (API/backend), React 18 + Vite (frontend), PostgreSQL + Prisma, Docker Compose, Nginx, MinIO (S3), GitLab CI/CD, hosted on Hetzner (EU/Germany). Key responsibilities: backend ...

    €525 Average bid
    €525 Μέση Προσφορά
    229 προσφορές
    Furniture E-Commerce Website
    6 μέρες left
    Βεβαιωμένο

    I’m looking for an experienced full-stack developer to review, audit, and improve my existing web application. The platform is already live, but I need a technical and UI polish to ensure everything works smoothly and efficiently. I want someone who can thoroughly test all features, identify issues, improve the UI/UX where needed, and clean up backend logic for better performance and structure. live here - Scope of Work • Review the entire website (frontend + backend) • Test all features and user flows • Fix UI inconsistencies and improve layout where necessary • Improve responsiveness across desktop and mobile • Refactor inefficient frontend components if required • Review backend API response structure and optimize it • Fix bugs and improve p...

    €936 Average bid
    €936 Μέση Προσφορά
    155 προσφορές

    I’m building a mobile-only app that needs a real-time text chat backend dedicated to one-on-one conversations. The goal is a lightweight, low-latency server that can authenticate users, deliver messages instantly, store chat history, and scale as the user base grows—all without the overhead of group or public room logic. I’m open to proven stacks such as Node.js with WebSocket/, Go with gRPC, or an equivalent solution that plays nicely with iOS and Android clients. End-to-end encryption, push-notification hooks (FCM / APNs), and a RESTful or GraphQL API for ancillary data are highly desirable. Deliverables • Production-ready server code with clear setup instructions • Secure user authentication and encrypted message transport • Message persistence (Mo...

    €402 Average bid
    €402 Μέση Προσφορά
    123 προσφορές
    FUELZ PRO
    6 μέρες left

    I’m ready to take my Indian D2C brand online and need a full-stack developer who can turn the entire buying journey into a smooth, sales-driven experience. The focus is simple: increase sales of our physical products through a fast, reliable, and easy-to-use website. Here’s what I have in mind. Customers should be able to browse a clean catalogue, add items to a shopping cart without friction, check out via popular Indian payment methods (UPI, debit/credit cards, wallets), and immediately receive an order-tracking link they can follow in real time. Behind the scenes I’ll need an admin dashboard where my team can update products, view orders, and generate basic sales reports. To keep the site scalable and future-proof, use the modern stack you’re most comfortab...

    €100 Average bid
    €100 Μέση Προσφορά
    24 προσφορές

    I want a clean, fast portfolio site built entirely with the MERN stack—MongoDB, Express, React, and Node.js. The goal is to present my work and services in a professional, responsive layout that looks great on desktop and mobile alike. Key pages will include Home, About, Projects, and Contact, but I’m happy to discuss additional sections if you feel they will strengthen the overall presentation. No user accounts or authentication flows are required, so you can keep the build streamlined and performance-focused. Design matters: subtle animations, smooth page transitions, and an intuitive navigation bar will help the site feel polished. SEO-friendly markup and meta tags are also important so that search engines can pick up the content quickly. Please deploy the finished ...

    €228 Average bid
    €228 Μέση Προσφορά
    113 προσφορές

    I’m rolling out the first release of a job-searching platform that already sits on top of a community of 87 million professionals. The entire focus of this build is to let candidates search and discover employer-posted opportunities quickly and intuitively. Core scope • Job listings are the single feature we need live for launch. Employers must be able to create, edit, publish, and archive their openings through a straightforward dashboard, while seekers browse, filter, and save roles. • Only direct employers will post ads in this phase. The workflow has to reflect that—no agency fields, fees, or approval steps. • Clean, responsive UI that feels inviting to a global audience and scales to the size of our network. • Solid search & filter logic (k...

    €623 Average bid
    €623 Μέση Προσφορά
    55 προσφορές

    I’m looking for an experienced developer or small team to build a reliable real-time data scraping system for Evolution Gaming live game shows, using an authenticated LeoVegas session, and integrate it into my existing website SpinLytics.com. This project is strictly focused on data reliability. Evolution Gaming does not provide public APIs, so the system must extract live round results directly from the authenticated client session. A working and stable data scraper is mandatory and must be guaranteed by the developer. The system must collect live round data for Evolution game shows such as Crazy Time, Monopoly Live, Dream Catcher, Funky Time and similar. Each round result must be captured immediately when officially published, without missing rounds, without duplicates and in cor...

    €171 Average bid
    €171 Μέση Προσφορά
    53 προσφορές

    Please read carefully before bidding. We are building a production-grade AI-powered building inspection report platform. 90% was built in base44 however, base44 cannot parse pdf"s larger than 10MB, so we have hit a roadblock and decided to take another route. This is NOT: *A WordPress job *A Shopify job *A bubble/no-code job *A “prompt engineering” job *A basic CRUD web app This is a serious backend architecture project involving: PDF parsing (11MB+ technical reports) AI defect extraction Structured data normalization Repair cost estimation logic Long-running job orchestration Background workers / queues Multi-user concurrency Production deployment architecture NOTE: Required Technical Stack (Non-Negotiable) You must have experience with: Node.js or Py...

    €2371 Average bid
    €2371 Μέση Προσφορά
    227 προσφορές

    We are looking for an experienced full-stack developer or development team to build a complete Society / Apartment Management Software for residential housing societies. The solution should include a Web Admin Panel and Mobile Applications (Android & iOS) for residents and security staff. The software must be scalable, secure, and user-friendly. Scope of Work: The system should include the following core modules: 1. Member / Resident Management - Owner & tenant database - Flat/unit management - Document upload (KYC, agreements) - Move-in / move-out tracking - Parking allocation 2. Billing & Accounting - Monthly maintenance auto-generation - Custom charge creation - Late fee & interest calculation - Online payment integration (UPI, cards, net banking) - Receipt generat...

    €1183 Average bid
    €1183 Μέση Προσφορά
    143 προσφορές
    deploy and configure the Signal Private Messenger server
    6 μέρες left
    Βεβαιωμένο

    deploying the official open-source backend components and integrating them with various third-party services for full functionality. • mainly our requirements our own infrastructure Self-Hosted with Custom Instance public rebranded messaging app. • Only people who have previously studied and worked on production-style Signal server architecture and structure should communicate • Those who have not previously studied and worked on production-style Signal server architecture and structure should not submit bid proposals. • The official source code is open-source and available on GitHub. • You only need to deploy and configure the Signal server only. The process requires significant technical expertise in server management, Java, database administrati...

    €97 Average bid
    €97 Μέση Προσφορά
    55 προσφορές
    Stealth AI Web App Build
    6 μέρες left
    Βεβαιωμένο

    I’m heads-down on a stealth-mode AI initiative and need another sharp developer to turn the core models we already have into a polished web application. The very first milestone is to stand up an end-to-end, production-ready site that lets users interact with the AI through a real-time chat interface. What I’m after is straightforward but technically demanding: a secure, scalable front- and back-end, wired cleanly to our existing inference endpoints so conversations feel instant and natural. While React /  on the front and Node or Python APIs on the back make sense, I’m open to whichever modern stack you prefer—so long as it’s maintainable and can be deployed quickly to AWS, Vercel, or a similarly robust host. Deliverables • Web applicat...

    €18 / hr Average bid
    €18 / hr Μέση Προσφορά
    323 προσφορές

    I’m launching an online store and need a developer who can take the project from blank domain to a fully operational e-commerce site. The single non-negotiable requirement is a rock-solid payment gateway integration that handles multiple cards securely and passes PCI compliance checks. I’m open on platform—Shopify, WooCommerce, Magento, or any other stack you’re comfortable with—as long as the final build is stable, fast, and easy for me to manage after hand-off. Product search, filters, and customer reviews may be added in later phases, but they aren’t part of this initial scope. Deliverables • Responsive storefront with sample product catalog • Payment gateway set up, tested end-to-end in both sandbox and live modes • Admin das...

    €134 Average bid
    €134 Μέση Προσφορά
    85 προσφορές
    €159 Μέση Προσφορά
    64 προσφορές
    Automation-First Sales System Lead Handling MVP
    5 μέρες left
    Βεβαιωμένο

    I’m building a high-end real-estate lead engine that can capture, qualify, and route 150–200 fresh inquiries every week with a hard 99.5 % uptime target. Instead of a generic chatbot, the core of this MVP is a lightning-fast Custom Qualification UI written in React, backed by a Node.js API and a PostgreSQL (or comparable SQL) data store. What I need from you is end-to-end ownership of the stack: solution architecture, clean code, robust testing, and cloud deployment. The product must open the door for future add-ons such as a real-time analytics dashboard, but for this first milestone the focus is on: • Lead scoring system that assigns quality grades the moment data arrives • Automated lead routing that pushes hot prospects to the correct broker or CRM queue wit...

    €7164 Average bid
    €7164 Μέση Προσφορά
    69 προσφορές
    Advanced Application-Layer Security Enhancement!!!!
    5 μέρες left
    Βεβαιωμένο

    Security Engineer to implement advanced application-layer security improvements, session control, and structured framework upgrades. This is a higher complexity engagement involving architectural work and controlled deployment. Scope of Work 1. Concurrent Login and Session Management Design and implement controlled session management. Responsibilities Implement Redis or ElastiCache-based session tracking Develop middleware to prevent unauthorized concurrent sessions Build configurable session policies Implement detailed audit logging Ensure compatibility with mobile clients Support emergency break glass access scenarios Healthcare-aligned audit logging is required. 2. Administrative Portal Access Control (Optional VPN / Zero Trust) Secure administrative access to sensitive function...

    €459 Average bid
    €459 Μέση Προσφορά
    21 προσφορές
    Advanced Security Enhancement for Web Application!!
    5 μέρες left
    Βεβαιωμένο

    Security Engineer to implement advanced application-layer security improvements, session control, and structured framework upgrades. This is a higher complexity engagement involving architectural work and controlled deployment. Scope of Work 1. Concurrent Login and Session Management Design and implement controlled session management. Responsibilities Implement Redis or ElastiCache-based session tracking Develop middleware to prevent unauthorized concurrent sessions Build configurable session policies Implement detailed audit logging Ensure compatibility with mobile clients Support emergency break glass access scenarios Healthcare-aligned audit logging is required. 2. Administrative Portal Access Control (Optional VPN / Zero Trust) Secure administrative access to sensitive function...

    €1006 Average bid
    €1006 Μέση Προσφορά
    28 προσφορές
    Advanced Application-Layer Security Enhancement
    5 μέρες left
    Βεβαιωμένο

    Security Engineer to implement advanced application-layer security improvements, session control, and structured framework upgrades. This is a higher complexity engagement involving architectural work and controlled deployment. Scope of Work 1. Concurrent Login and Session Management Design and implement controlled session management. Responsibilities Implement Redis or ElastiCache-based session tracking Develop middleware to prevent unauthorized concurrent sessions Build configurable session policies Implement detailed audit logging Ensure compatibility with mobile clients Support emergency break glass access scenarios Healthcare-aligned audit logging is required. 2. Administrative Portal Access Control (Optional VPN / Zero Trust) Secure administrative access to sensitive function...

    €1120 Average bid
    €1120 Μέση Προσφορά
    27 προσφορές
    Advanced Security Enhancement for Web Application
    5 μέρες left
    Βεβαιωμένο

    Security Engineer to implement advanced application-layer security improvements, session control, and structured framework upgrades. This is a higher complexity engagement involving architectural work and controlled deployment. Scope of Work 1. Concurrent Login and Session Management Design and implement controlled session management. Responsibilities Implement Redis or ElastiCache-based session tracking Develop middleware to prevent unauthorized concurrent sessions Build configurable session policies Implement detailed audit logging Ensure compatibility with mobile clients Support emergency break glass access scenarios Healthcare-aligned audit logging is required. 2. Administrative Portal Access Control (Optional VPN / Zero Trust) Secure administrative access to sensitive function...

    €67 Average bid
    €67 Μέση Προσφορά
    21 προσφορές

    ## Project Overview We are developing a mobile application integrated with a Shopify embedded app and a web-based admin dashboard. We are looking for an experienced **full-stack developer (or team)** and a **UI/UX designer** to support development from wireframing to deployment. This is an MVP with potential for long-term collaboration and feature expansion. --- ## Required Technical Skill Set ### Backend Development * Strong experience with **Node.js / Python / PHP** (flexible stack) * RESTful API development * OAuth and authentication flows (JWT, token-based auth) * Webhook handling * Cloud-based architecture * Database design (Postgres / MongoDB / Firebase or equivalent) * File storage integration (AWS S3 or similar) * Scalable SaaS architecture planning --- ### Mobile Development * ...

    €18 / hr Average bid
    €18 / hr Μέση Προσφορά
    186 προσφορές

    I'm seeking an experienced backend developer to build the backend for a cab booking application using Node.js. Essential Features: - User authentication - Payment processing - Driver tracking Ideal Skills & Experience: - Proficiency in Node.js - Experience with user authentication and payment processing - Knowledge in tracking algorithms and databases (MongoDB, MySQL, or PostgreSQL) Please provide relevant work experience.

    €573 Average bid
    €573 Μέση Προσφορά
    63 προσφορές

    Busco a quien desarrolle una página web para mi negocio de sorteos en línea. La plataforma debe permitir vender números aleatorios de dos o más cifras y garantizar que cada compra asigne y registre esos números automáticamente. Requisitos funcionales • Pasarela de pago centrada en tarjeta de crédito/debito y pagos PSE • Motor que genere, distribuya y almacene números aleatorios para cada usuario. • Panel de usuario con: – Historial de transacciones visible y filtrable. – Notificaciones configurables sobre compras, ganadores y promociones. • Página pública de resultados para mostrar ganadores en tiempo real. • Sección de Términos y Condiciones accesible d...

    €128 Average bid
    €128 Μέση Προσφορά
    46 προσφορές
    Retainer Developer for Bug Fixes and Trading Development
    5 μέρες left
    Βεβαιωμένο

    We are looking for a skilled retainer developer to monitor, maintain, and fix bugs on our website built with React, Supabase, TypeScript, WebSockets, and PostgreSQL. In addition to maintenance, we need the developer to help create and enhance trading features on our loot box style platform which is based around football. Key Responsibilities: - Monitor and maintain the website - Quickly identify and fix bugs - Improve stability and speed of the site - Develop and enhance trading features - Implement new features based on user feedback Required Skills: - React - Supabase - TypeScript - WebSockets - PostgreSQL - Node.js - JavaScript This is an ongoing retainer role (1-3 months initially) with potential for long-term engagement. We need someone with very good availability, especially duri...

    €35 / hr Average bid
    €35 / hr Μέση Προσφορά
    228 προσφορές

    Hi future legend, I’m building a fast-growing content agency and I’m looking for a skilled Discord Bot Developer to help me create a fully automated recruitment & deployment system. This isn’t just a small bot tweak. I want to build something clean, scalable, and professional from the start. If you enjoy building structured systems and automation that actually gets used daily ; this project is for you. What We’re Building Inside our Discord server, freelancers (Editors & Writers) will: Open their own ticket Select their role via dropdown Automatically receive trial instructions Submit their trial via modal Be reviewed by staff using buttons Get deployed to the team with one click The goal: Zero manual chaos. Full automation. Scalable structure. Core ...

    €405 Average bid
    €405 Μέση Προσφορά
    122 προσφορές

    It is 2 stage project 'I have the source code available, i have the API dataset available. But definately need a NEW DNN training Dataset. simple UI . Total Project is 250 USD STAGE 1 - 100 USD STAGE 2 100 USD Deplyment, Testing and Document 50 USD STAGE 1 handles intelligence + cloud STAGE 2 handles device + communication + app STAGE- I Backend Engineer (Cloud + Data + API) Deep Neural Networks for classification (imbalanced datasets, SMOTE preferred) Python (TensorFlow/PyTorch) and model deployment via REST API Handling weather/time-series datasets Cloud hosting (Azure/AWS) and database management SMS gateway integration and push notification backend Secure API development and logging system Deliverable: Deployed ML model with working API endpoint and backend system. STAGE 2 &...

    €242 Average bid
    €242 Μέση Προσφορά
    29 προσφορές
    React Native Environment Setup
    5 μέρες left
    Βεβαιωμένο

    I need a clean, fully-working React Native development environment configured on my Windows machine so I can build and test for both Android and iOS. The goal is to finish with everything installed, verified, and documented so I can open a terminal, type one command, and see a Hello World app running on an Android emulator and an iOS build artifact generated through a reliable workflow. Please handle every step—from installing the correct Node version, JDK, Android Studio, and SDKs, to configuring environment variables, Gradle, and the React Native CLI. Because iOS compilation cannot run natively on Windows, I also need you to set up (or clearly guide me through) a workable solution such as Expo, EAS Build, or another cloud-based build service that lets me produce an iOS binary with...

    €23 Average bid
    €23 Μέση Προσφορά
    65 προσφορές

    I’m launching an AI-focused services agency and need dependable development partners who can take projects from idea to deployment across three key fronts—website, mobile app, and an AI-powered receptionist chatbot dedicated to appointment scheduling. For the web side, I typically lean toward modern stacks such as React, or Vue on the front end and Node, Django or Laravel on the back; however, I’m open to whatever you do best as long as performance, security and clean code are non-negotiable. Mobile work will cover both iOS and Android. Cross-platform solutions like Flutter or React Native are welcome, but native Swift/Kotlin skills are equally valuable if a project demands it. The AI receptionist must integrate with common calendar systems (Google, Outlook, iCloud, e...

    €58 Average bid
    €58 Μέση Προσφορά
    62 προσφορές
    Ithu Namma Radio -- 2
    5 μέρες left

    I’ve just finished deploying a new Android mobile application and everything appeared to go smoothly—until I tried to launch it. Right after installation the app attempts to talk to the backend and immediately throws a server error. The APK itself installs without complaint; the trouble starts only once the first request is sent. I need someone to dive in, locate the root cause on the server side, and implement a clean fix so the app can connect reliably every time. Access to the server, source code, and crash logs is ready for you as soon as we agree to move forward. Please bring experience with common Android back-end stacks (Node, PHP, Java, or similar) and a methodical debugging approach. Once resolved, I’ll confirm the build installs and runs error-free on multiple ...

    €6 Average bid
    €6 Μέση Προσφορά
    9 προσφορές
    Ithu Namma Radio
    5 μέρες left

    I’ve just finished deploying a new Android mobile application and everything appeared to go smoothly—until I tried to launch it. Right after installation the app attempts to talk to the backend and immediately throws a server error. The APK itself installs without complaint; the trouble starts only once the first request is sent. I need someone to dive in, locate the root cause on the server side, and implement a clean fix so the app can connect reliably every time. Access to the server, source code, and crash logs is ready for you as soon as we agree to move forward. Please bring experience with common Android back-end stacks (Node, PHP, Java, or similar) and a methodical debugging approach. Once resolved, I’ll confirm the build installs and runs error-free on multiple ...

    €7 Average bid
    €7 Μέση Προσφορά
    13 προσφορές

    I have two software initiatives that need to move from concept to release: an intuitive video-editing application and a companion tool for building modern, responsive websites. For the video editor, I want users to be able to import clips, trim, rearrange and export with ease. Once the core workflow is rock-solid we can layer in more advanced functions—think multi-track timelines, chroma-key, voice-over or anything else you can justify from a performance and UX standpoint. Suggest the framework you feel best balances speed, portability and long-term maintainability; I’m open to native iOS/Android, Flutter, React Native or even a desktop build if that proves wiser. The web-development app should let non-technical users assemble clean, standards-compliant pages through a drag...

    €775 Average bid
    €775 Μέση Προσφορά
    39 προσφορές

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