Σχεδιασμός Βάσεων Δεδομένων Jobs

Our product team is expanding rapidly—twenty-seven developers came on board last week—and I’m adding a small group of senior voices who can guide the architectural direction of our codebase. If you are a native English speaker with at least two years of professional, hands-on experience in software architecture, I’d like you working alongside our engineers to keep designs scalable, maintainable, and well-documented. You will meet with project leads to discuss requirements, shape high-level component diagrams, review pull requests for architectural soundness, and create concise documentation that the entire team can follow. Clear written and spoken communication is essential; you’ll often be the bridge between product ideas and implementation details. This is...

I need a clean, responsive website dedicated to healthy eating. The core of the build is a searchable, filter-friendly recipe database where visitors can quickly find dishes by ingredient, dietary preference, or prep time. Alongside the recipes, I want an easy-to-update blog section for articles, tips, and success stories. A CMS such as WordPress, Ghost, or a similarly straightforward platform is fine as long as I can add new recipes and posts without touching code. Please structure the database so each recipe has its own page, categories, tags, nutrition facts, and a printable view. The blog should share the same design language and SEO setup. Key deliverables • Fully responsive website (desktop, tablet, mobile) • Recipe database with advanced search/filter and nutrition f...

Je cherche un(e) spécialiste capable de prendre en main un environnement Trino + Apache Iceberg déjà en production et de l’amener à un niveau de performance supérieur. Nous traitons actuellement plus de 10 téraoctets de données et notre priorité absolue est l’optimisation des performances, en particulier : • Réduction significative des temps de requête • Meilleure utilisation des ressources CPU, mémoire et réseau Ce que j’attends : 1. Audit rapide de la configuration existante (catalogues, moteurs de stockage, paramètres Trino, format Iceberg). 2. Recommandations concrètes et hiérarchisées : partitioning, zoning, sizing, tuning JVM, cache index,...

I need our database layer re-designed so that records load faster and more reliably through the web application. The focus is squarely on improving data accessibility: queries must return results quickly, and common user actions should no longer be blocked by heavy reads or locking issues. Work begins with an audit of the current schema, index usage, and query patterns. From there, produce an optimized structure, add or adjust indexing, and recommend any caching or sharding techniques that match the projected growth of our data set. Wherever possible, keep the solution portable across standard relational engines (PostgreSQL or MySQL are most relevant right now) and cloud hosting environments. Acceptance criteria • Revised schema and index scripts in executable SQL. • A concis...

I need a complete e-commerce presence built from the ground up—a responsive marketing website paired with a fully-featured web application. The platform must be custom-built rather than Shopify or WooCommerce so that I can keep full control over the tech stack, integrate bespoke business logic, and scale without template constraints. Core features to implement: a browsable product catalog with fast, intuitive search; a secure shopping cart that flows smoothly into checkout; and a section where customers can leave ratings and reviews that surface intelligently on product pages. I will supply brand guidelines, product data, and preferred payment gateway credentials as soon as we start. Please architect the back-end and front-end, handle database design, and deliver clean, well-commen...

# SAFReC Management Dashboard — Developer Brief ## 1. Objective Build a secure, low-cost management system integrated with SAFReC’s website for members, reports, training, tasks, events and documents. Support branch-to-national reporting. Assess the website and Survey123 before choosing the architecture. ## 2. Roles and access Support Chaplain, Candidate, Volunteer, Mentor, Branch/Area Commander, Provincial/National Management and System Administrator. Access is restricted by role and assigned branch/area/province. Members manage their own relevant records, reports, tasks and training; mentors see assigned candidates; Commanders oversee authorised areas; Head Office has approved national oversight; administrators manage technical settings. Head Office approves final permissio...

I already run a fingerprint-based biometric system and now need it to work side-by-side with a cloud face-recognition service, tied together through their REST APIs and surfaced in one place. Your first step will be to pull enrollment and verification events out of the existing fingerprint SDK. On the face-recognition side I am flexible—AWS Rekognition, Azure Face API, or Google Cloud Vision are all options—so you may choose whichever platform best meets accuracy, latency, and cost targets. The heart of the project is a unified web interface that stores and displays real-time activity logs from both modalities. Every time someone scans a finger or their face is captured, a single entry should appear with timestamp, user ID, device and confidence score. Deliverables •...

# ZQN Focus — Working Prototype Challenge ### Build the Prototype. Get Considered for a Paid Project & CTO Role. **Company:** ZQNFOX BE PRIVATE LIMITED **Product:** ZQN Focus **Project Type:** Android Application, AWS Backend & Product Development **Opportunity:** Prototype Challenge → Paid Development Project → Potential CTO Appointment ## About the Company ZQNFOX BE PRIVATE LIMITED is an early-stage technology company building **ZQN Focus**, a student productivity and digital-distraction management solution designed to help students improve concentration and develop better study habits. We are looking for a capable and committed developer who can turn our product concept into a functional working prototype and potentially join us for the next stage of de...

**Title: Seeking a Senior Full-Stack Engineer to Review and Secure Our Claude-Built CRM & Websites** We're looking for an experienced full-stack engineer to review, test, and improve an existing CRM and multiple websites developed with Claude Code. The code is largely prepared, and we want an experienced engineer to help us identify issues, validate the architecture, and ensure the applications are reliable and secure before production deployment. **Scope of work:** - Review the existing codebase, architecture, and database design. - Identify bugs, security vulnerabilities, and architectural weaknesses. - Audit authentication and role-based access controls. - Validate privacy and data isolation between owners, admins, agents, callers, and sub-agents. - Review API endpoints, dat...

# BlindForward SaaS Blueprint & Proof of Concept (PoC) I am building BlindForward, a consent-based email-forwarding SaaS for Chartered Accountancy (CA) firms. I am looking for an experienced full-stack developer to establish a secure technical foundation before production development begins. ## Project Objective The initial engagement will deliver comprehensive technical documentation and a working Google-based Proof of Concept (PoC). The goal is to validate the proposed architecture, email forwarding workflow, security approach, and database integration before committing to full-scale development. ## Proposed Technology Stack - Google Apps Script - Gmail API and Google OAuth - Supabase PostgreSQL - HTML, CSS and JavaScript for dashboard planning and future development ## Require...

Freelance Project Brief Airtable Product Development & Catalogue Management System Client: Woodstock Laundry & Granadilla Swim Project overview We are a South African apparel business operating two brands, Woodstock Laundry and Granadilla Swim. We design, manufacture and sell clothing and swimwear through wholesale, retail and e-commerce channels. We are looking for an experienced Airtable developer to build a centralised product development and catalogue management system. Currently, our team manually creates and maintains PDF catalogues containing product photographs, CAD drawings, descriptions, colourways, fabric specifications, trims and other product information. We want to replace this manual process with a user-friendly, form-based system that allows our team to captu...

Developed a Pharmacy Management System using SQL to design and build a relational database for managing essential pharmacy operations and data. The project includes tables for Suppliers, Drug Categories, Medicines, Pharmacists, Invoices, and Invoice Details, with properly defined Primary Keys, Foreign Keys, and relationships between tables. Implemented data insertion, retrieval, filtering, sorting, and modification using SQL queries, including Aggregate Functions, GROUP BY, JOINs, and Subqueries, as well as INSERT, UPDATE, and DELETE operations. Technologies: SQL Server, Database Design, Relational Databases, SQL Queries.

I need a specialist who can wire several production-level databases together so that information flows in real time, is captured accurately, and remains easy to trace long after it lands in storage. The job starts with building the live integration layer: connections, transforms, and routing must update immediately as changes occur in the source databases (no batch or nightly jobs). Once the stream is flowing, I want a solid verification routine to run alongside it. Data consistency checks should flag mismatches, duplicates, or missing fields the moment they appear, then write clear exception logs I can review. This audit trail will be the backbone of weekly compliance reviews. All incoming files—whether produced by the integration or uploaded manually—should sit in an organi...

I’m building an “online rental boyfriend” service and need a mobile app developed from the ground up for both iOS and Android. The first release focuses on a polished profile-creation flow—think seamless sign-up, photo/video uploads, engaging bios, availability tags and quick edits. Once users submit a profile it should sit in an admin queue where I can approve, reject or edit before it goes live. You may use Flutter, React Native, native Swift/Kotlin or another performant stack; what matters most is clean architecture, readable code and smooth store approval. I will supply brand assets and rough wireframes, but I’m counting on you for intuitive UI/UX, back-end setup, database design and deployment to the App Store and Google Play. Deliverables • Univer...

1. Technical Features & Functional Scope • Core Architecture: Built using WordPress, WooCommerce, and Dokan Multi-Vendor / Webkul B2B ecosystem for optimized out-of-the-box marketplace management. • Supplier (Udyami) Onboarding: Smooth mobile OTP-based registration and a personalized vendor dashboard to upload factory details, images, and contact information. • Product Cataloging: Comprehensive display supporting bulk pricing tiers (tiered pricing), variants, custom category attributes, and a dedicated 'Price on Request' toggle. • Lead Generation (RFQ Module): Optimized 'Get Best Price' form embedded on every listing to capture absolute buyer parameters (quantity, location, budget, delivery timeline). • Low-Cost Communication: Masked visibil...

I’m building a compact registration system and need a skilled backend developer to complete the core infrastructure. The application must store registration data in a MySQL database, generate admit cards and registration slips in PDF format, and allow administrators to create manual entries that are saved just like online submissions. Key elements I want you to handle: • Database layer – design the schema and write the queries/ORM code to capture every registration field, plus logs for audit and troubleshooting. • Payment flow – integrate Razorpay so the user can pay, receive an on-screen confirmation, and trigger creation of the PDF registration slip only after a successful callback. • Admit card generation – automatically compile the stored...

I maintain several live databases that generate a steady stream of purely numerical records—transaction totals, sensor readings, and performance metrics. The raw pulls already sit in secure tables; what I need now is a sharp pair of eyes (and ideally a few smart scripts) to make sure every figure is trustworthy before it feeds our reporting pipeline. Your focus will be end-to-end validation rather than manual typing. You’ll connect to the databases remotely, run consistency checks, flag outliers, trace discrepancies back to source tables, and document any corrections you make. If you prefer working in SQL, Python (pandas), or even a robust Excel environment linked through ODBC, that is perfect; the key is delivering a clean, fully audited dataset that reconciles against the or...

My application suddenly stopped reaching its underlying database and any direct connection attempt times out or throws generic “unable to access database” errors. Credentials have not changed and the server process appears to be running, so I suspect something deeper—possibly configuration, permission conflicts, or corruption—but I need fresh eyes to pinpoint and resolve it quickly. You will start by investigating the connection path end-to-end, identify the exact obstacle, then apply the safest fix to restore full read/write access without data loss. Please document the steps you take and any changes you make so I can keep the system stable going forward. To jump in, let me know which diagnostic checks you would run first and any information you need from me (log...