Codeigniter login and registration with sessionεργασίες

I'm in need of an experienced CodeIgniter developer to help with a variety of tasks. Key Responsibilities: - Front-end Development: You'll be responsible for designing and implementing the user interface of our web application. A strong grasp of HTML/CSS, and Bootstrap will be crucial here. - Back-end Development: You'll also be involved in developing the server-side logic, and ensuring high performance and responsiveness to requests from the front-end. Proficiency in PHP is a must. - Database Integration: You'll be tasked with ensuring a seamless connection between the front-end and back-end systems, using CodeIgniter's database functions. I'm also open to discussing any specific features or functiona...

I need a new website for my snack food b...customers to make purchases as guests, without the need for user registration. This is to streamline the buying process and make it as quick as possible. - For payment, I'm currently looking to integrate bank transfer as the primary and only payment method. Ideal Skills and Experience: - Prior experience in designing and developing e-commerce websites - Proficiency in integrating payment gateways - Understanding of user experience design and the ability to create a seamless checkout process - Knowledge of e-commerce best practices, particularly regarding guest checkout and bank transfer payment integration. I'm open to suggestions and would appreciate insights on improving the we...

I'm seeking an expert in Windows Server licensing to clarify some key points. - I have a single Windows Server, sp...single Windows Server, specifically Windows Server 2019 or 2022. - 5000 user accounts will need to access this server concurrently and they will use web application on Blazor Server. - I need advice on the appropriate licensing model to accommodate this level of usage. Ideal candidates for this project are professionals with: - Profound knowledge of Windows Server licensing, preferably Windows Server 2019 or 2022 - Experience with large-scale user access scenarios and concurrent usage. - Ability to explain complex licensing models in simple, user-friendly terms. What is cheapest model for me to utilize. People will connect to app using C...

...develop a system with an admin panel and personal user accounts. We need to keep statistics on how much traffic each user gives, how many downloads and how many installations. Ready to listen to your suggestions Key Requirements: - **Software Distribution**: The process should involve manual installation, ensuring that users are actively involved in the process. - **Analytics Tracking**: The network should be able to provide detailed insights into user behavior, software popularity, and other relevant metrics. - **User Account Management**: A centralized system for user registration, login, and profile management is essential for this project. Ideal Skills and Experience: - Proficiency in Windows software development and d...

I'd like to request a quote for "TIP for project codeigniter 4 completed with partner https://www.freelancer.com/projects/php/Codeigniter-design-template-Replacement/

...Official Partner of TikTok LIVE Turkey. We provide free support to the streamers working with us. This system will allow people who bring us publishers with their own referral links to earn commission on the earnings of the publishers. It is not a titan chain style system to be earned from what they bring. IMPORTANT NOTES This system is a completely legal system where members actually work for us and earn from us through the publishers they bring to us. You can think of it as a basic Affiliate system. It can be used through a script with a membership system, ready, useful and nice design. People who will work as a partner of our agency will be able to enter from a url such as and login or register. Since this page will be open to e...

I'm looking to hire website designers to create an enticing and user-friendly website for my consulting company. I'm in need of a professional who can merge the e-commerce elements with the consulting focus. Key Features Needed: - User Experience: This is the most important aspect. The design should reflect our professional image and help users navigate with ease. The site should be engaging and user-friendly. - E-commerce Features: We don't require a complex e-commerce system, but I do need a shopping cart and user registration and login capabilities to be present. The design should be clean and professional, but with an e-commerce edge. - Mobile Responsiveness: A significant chunk of our audien...

I'm looking for a custom add-on for Perfex CRM. The add...CRM. The add-on shall generate a graph that can be filtered by personnel and date. Key requirements include: - Display data: The graph should show the number of opportunities. - Chart style: The preferred style is a line chart. - Filtering: The graph should be filtered based on selected personnel and date ranges. Ideal skills for this project include familiarity with Perfex CRM, strong PHP and MySQL experience, as well as an understanding of charting libraries for graph representation. A professional who can work efficiently and deliver a user-friendly, visually appealing solution will be highly appreciated. There is a ready-made page similar to our needs in Perfex CRM. I just want it to be ...

...single webinar at a time, with Audio/Video interaction enabled. Key Responsibilities: - Manage the live interactions during the webinar - Facilitate smooth Audio/Video discussions - Ensure no technical glitches during the session - Maintain a high level of professionalism and customer service throughout Ideal Candidate: - Proven experience in managing webinars with Audio/Video interaction - Excellent communication and customer service skills - Ability to multitask and manage a dynamic online event - Strong technical skills to troubleshoot minor technical issues - Comfortable handling all responsibilities in a solo capacity Your role will be crucial in ensuring a seamless webinar experience for participants. A commitment to maintaining a ...

I'm seeking an individual with the Azure Virtual Desktop Speciality (AZ-140) certification to help me register in the AI Cloud Partner Program. Key Requirements: - Possession of Azure Virtual Desktop Speciality (AZ-140) certification is a must - Experience with Microsoft Partner programs, particularly the AI Cloud Partner Program, is highly advantageous Your primary task will be assisting me in registering for the AI Cloud Partner program. This involves navigating through the registration process and ensuring all necessary steps are completed accurately. If you're proficient in Azure Virtual Desktop and understand the intricacies of Microsoft Partner programs, especially AI Cloud Partner Program, I'd love to hear from you.

I need a good developer who know JS, PHP to fix my wordpress custom plugin login form made, im facing issues that sometimes the form keeps loading and not processing any actions.

...requesting services. Agent must be able to respond with our rates and negotiate this with the customer - If we win the job the agent must then be able to login to various platforms (e.g. , or ) and post an ad to advertise the job. May need to also call local businesses to get information. - We will have many subcontractors apply for the jobs. Agent needs to communicate and negotiate with these individuals. - Agent will present best options for us to pick from. - Once we pick they will interact with our systems onboard the subcontractor and communicate with customer to confirm service start date and time. - We will also get emails requesting rescheduling/cancellation of services. Agent must be able to intera...

I am looking for an expert executive with experience in registering carbon credit projects in international registries. The ideal candidate will have knowledge and experience in the following areas: - Registration Process: You should be familiar with the registration process in various international registries. - Expertise in India: As my project is based in India, it's crucial that you have experience dealing with the specific regulations and requirements in that region. - Forest Conservation: Since my project focuses on forest conservation, experience in registering similar projects is a huge plus. - Carbon Sequestration: The primary goal of my project is carbon sequestration, so a strong understanding of this aspect is necessary. Y...

...application for iOS and Android. The main purpose of the app is information sharing, with our target audience being adults. Therefore, user authentication, push notifications, and in-app purchases are essential features that need to be implemented. Key Features: - User Authentication: A secure and reliable sign-up and login system is crucial to ensure the safety of user data. - Push Notifications: The app should be able to send real-time notifications to users to keep them engaged. - In-App Purchases: There will be a need for users to make purchases within the app, so a seamless and secure payment system is required. Ideal Skills and Experience: - Proficient in developing cross-platform apps for both iOS and Android. - Pri...

...for a talented UI designer to enhance the Login and Create Profile screens of my mobile app. The app is primarily used by business professionals, so the design needs to be clean, minimalistic and visually appealing. These are the two starting screens. If things go well, I will proceed with 10 more screens Current Designs: Key Requirements: - New Designs in Figma - Improve the usability of the Login and Create Profile screens: The current design is basic and lacks the sophistication and intuitiveness needed for a business app. - Modern and sleek design: The new UI should incorporate modern design principles, with a sleek and professional look that will appeal to our target

...training in a Teams remote session working on a real project. You will need to have excellent skills not work on your own and Google the solution as will be doing live with the customer. We have 1 small project to start then a larger project to help us with if we can build a relationship and display good skills. Key Responsibilities: - Customize form elements to meet my specific requirements - Training on Teams fixing real problems Ideal Skills and Experience: - Proficiency in Power Apps Model Driven (Not Canvas Apps) - Extensive experience in UI customization - Experience working with Dynamics 365 and Power Platform - Strong understanding of data management in Power Apps - Strong English Spoken Fluently Please note that this pr...

What I want, is for you to read this carefully before responding and wasting your time and mine. I want a notification website built. That will give me notification via a generated email when certain things happen during a trading session. This email notification must be in real time or within 30 seconds of data updates using web sockets. So using web scrapping or, I can buy an API. Do basically, I need a signal when the volume for a symbol goes up or down within a certain percentage that I will give you. Based on previous day open and closing and current day. Looking at or is the type of data that the scrapping will come from. Read over this, let me know your cost to develop, time frame and monthly maintenance if any.

...for both Android and iOS with a cartoon design style. This game will include levels of varying difficulties - easy, medium, and hard. Key Requirements: Develop a Sudoku game for Android and iOS using Unity. Implement intuitive touch controls and an attractive UI. Integrate features such as hints, difficulty levels, and score tracking. Ensure compatibility across various devices and screen sizes. Prepare the game for publishing on the Apple App Store and Google Play Store, meeting their respective guidelines and requirements. Deliver clean and well-organized code for easy maintenance and updates. Include social media sharing functionality for users to share their scores. Implement a system where players receiv...

...experienced developer who can create a web-based calendar with a unique feature to allow my users admin to book dates. If a date is unavailable, the application should clearly indicate it. Calendar app **1. User Registration:** - Admin creates a new user by providing a username and password. - Store the user's credentials securely in a database, with password hashing and salting for security. -Allow user to make remember me so they don’t have to login each time. **2. User Login:** - User enters their username and password on the login page. - The system checks the provided credentials against the database records. - If the credentials are valid, the user is granted access to their account. **3. User Home Pa...

I'm looking for an expert "Wix website" creator to SETUP Complete Wix Site with good design style ( i will provide the specification only). What I Need: - Web designer who has developed Websites on "Wix" Site, From Start to End and Sites that are complex. Which Includes Basic Site Setup ( Login, Registration, Membership area, Payment, Account maintenance, Subscriptions, Point maintenance ,Database, Python Program setup) and anything associated to the above. Image generation will not be part of this project (will be a separate project). Skills Required: - Proficiency in web Designing on Wix Site. - Strong background in simple Python and DB design and setup. - Ability to communicate regularly on project status.

I'm looking to replicate the features and design of a specific portfolio website, inspired by Youtube Video. The original website includes a functionality. Since the original is modeled after a YouTube video, I'm also looking to include all features showcased in the video. Key Requirements: - Create a website with a design and features similar to that video website - Implement user login and registration functionalities - Include e-commerce functionality - Build a blog section - All features demonstrated in the YouTube video should be replicated Ideal Skills and Experience: - Proficiency in website cloning - Strong understanding of user authentication systems - Experience in e-commerce website development - Blog development exper...

In need of an experienced freelance photographer with a keen eye for candid photography to capture one of the most precious moments of my life - when I propose to my girlfriend in Florence. Key Details: • Date of occasion: 22/05/2024 or 23/05/24You will need to be available in the afternoon for the shoot. • Setting: The session will take place amidst Florence's . Required Photographer Experience: • Background in candid photography • Local or familiar with the city of Florence and its enchanting streets would be a plus. • Reliability to be present at the right time • Ability to work discreetly to maintain the surprise element Your role will not only be just to document, but to capture the moment through your shots. If y...

I need someone to create a crypto currency buy and sell website for me. It should have the following functions - Secure transaction processing - User authentication and login - Real-time market prices display The site should support Bitcoin and Ethereum only. It is essential that the transactional aspect of the website is secure as this is the main function of the site. I am looking for a freelancer who has experience in developing similar websites and has a good understanding of crypto currency exchanges. A strong understanding of security protocols and procedures is also essential. The project should be completed within a month.

I'm in need of a Telegram Bot and corresponding Web application for the wellness industry. Key Features for the Telegram Bot: - **User Registration**: The ability for users to sign up and create their own accounts. - **Daily Health Tips**: A feature that provides users with helpful health tips on a daily basis. - **Fitness Tracking**: The bot should enable users to keep track of their fitness progress. Key Features for the Web Application: - **Wellness Resources**: A comprehensive library of wellness resources for users to access. - **Appointment Scheduling**: An integrated system for users to book wellness appointments. - **Community Forum**: A platform for users to share experiences, ask questions, and support one another. - **Fitness Challenge*...

Maximum Pay $30 ISSUE: I’m not able to log into my Outlook email account via Windows/Parallels The same Outlook email account works fine on my other devices. SOLUTION: Correct the login issue so that I can log into my Outlook email via Windows/Parallels. Microsoft 365 Email - Login Issue I have a new official Windows 10 license. I have Windows 10 set up via Parallels on my Mac.

...Tasks: - Implement a 'Forget Password' feature in the app - Connect this feature to our custom backend system, which uses Node.js and Mongodb for user authentication - Ensure the feature works seamlessly with the current email and password login methods Ideal Skills and Experience: - Proven experience working with React Native - Proficiency in integrating backend systems, particularly Node.js and Mongodb - Familiarity with user authentication systems - Strong understanding of mobile app security and best practices - Ability to write clean, maintainable code - Good communication skills to discuss and understand the requirements efficiently. If you have experience with similar projects or have the ex...

...a new food delivery app. The app should be compatible with both iOS and Android operating systems. Features: - User Registration & Login: An essential feature that allows users to create an account and sign in. - Menu Browsing & Ordering: A menu system that is easy to navigate and enables users to place orders efficiently. - Delivery Tracking: A feature that keeps customers informed about the status of their delivery in real time. Key Payment Options: - Credit/Debit Card: Secure and easy-to-use online payment method. - Cash on Delivery: A popular option where the customer pays upon receiving their order. Ideal candidates for this project should have: - Previous experience in developing food delivery apps. - Proficiency in both...

I'm in need of a skilled full stack developer to create an E-commerce API website. Here are some details: - Programming Language: JavaScript, Python, ReactJs, NodeJs - Primary Purpose: This API will be solely dedicated to E-commerce activities. Key Features Required: - Shopping cart - Product search - Points wallet - Orders History - Login - OTP - New user / existing user (only mobile number) - Register and referral code - My Profile I'm open to suggestions for other features that could enhance the user experience on my website. Please provide your relevant experience specific to E-commerce API development in your proposal.

I'm in need of a Full Stack Developer proficient in PHP and JavaScript to work on a project involving Nginx, Laravel 11, and Vue3. Key Deliverables: - User Registration and Login: The website should allow for user registration and login. - Real-time chat: Implement a functional real-time chat system for users. - Notifications: Set up a notification system for users to receive real-time updates from the website. Additional Details: As the project owner, I've already designed the layout of the website. Your primary focus will be to implement the functionality using the stated technologies. The ideal candidate for this project should have: - Proficiency in PHP, Laravel and JavaScript, Vue3 - Experience in working wi...

The registration page of our website is encountering issues, where after submission, unidentified errors arise. I am seeking a professional who can: - Investigate the root of these errors and find a resolution - Optimize the registration process, ensuring a smooth user experience post submission And Also add option to add balance to user Your expertise will be pivotal in ensuring our users can effectively register on our platform. Ideal skills for this project include: - CPANEL -PHP -MYSQL

I'm looking for an experienced Python and Flask and Mysql developer to construct a multitenant REST API project with three key components: an admin module, a customer module, and SMS integration using Twilio. The project will require the following: Admin Module: - CRUD Operations: I'll need a solid set of operations for creating, reading, updating, and deleting entries. - User Management: The admin module should have a user management system. - Reporting and Analytics: The ability to generate reports and analyze data will be critical. Customer Module: - Multiple roles under Customer - Registration and Login: The customer module should allow users to register and log in securely. - Account Management: ...

I'm seeking a proficient web developer to create an e-commerce website for selling products/services. Some important features are: - User Account Creation: Users shou...developer to create an e-commerce website for selling products/services. Some important features are: - User Account Creation: Users should have the ability to create accounts on the site for purchasing products. Previous experience in integrating user login systems is a must. Build inventory system in it. Easy chat through the website with connectivity to sales reps Your responsibility will include making the process of purchase easy for the customers while also ensuring a secure online shopping environment. Familiarity with e-commerce platforms and best practices will increase the cha...

I'm looking to add new features to our WordPress website. - Message center where correspondence between us and client are kept with the ability to send emails and reminders. - Login/signup (already set up. Need to review) - forget password (already set up. Need to review) - Change password (already set up. Need to review) - User dashboard (manage profile) - Document management (Upload/View/Download) - Subscription plan - Recurring payment (Auto-renewal subscription) - Payment gateway integration - Payment of additional fee via website - Admin Panel: User management with uploaded document by customer and having an option to upload a document - Subscription management

...other messages. I am looking for a skilled and professional frontend developer to convert Figma designs into responsive ReactJS FE pages (by components structured) for a professional healthcare institution. The website will be multilingual, supporting Dutch, Turkish, Arabic, Berber, and English. Note: The website can be made fully static, no need for API / BE. Pages Details: 1. Homepage 2. Care Services: Outpatient Care 3. Care Services: Personal Care 4. Care Services: Home Care 5. Care Services: Housekeeping Assistance (Cleaning) 6. Work and Learning 7. Costs and Reimbursements 8. About Us 9. Client Satisfaction and Ratings: Zorgkaart Nederland 10. Contact: Form (Thank You Page) 11. Registration: Form (Thank You Page) 12. T...

...for a photographer with experience in product photography. There are two aspects to this project - 1. educate me on the art of product photography using the equipment I have available to me and 2. photographing products. The applicant should be highly creative and able to suggest original ways to photograph products to be eye-catching and appealing to shoppers in a highly competitive market. Initially this will be a one or two-session project at my location however there is ample opportunity for future work taking photographs for me when I either 1. don't have time or 2. just don't want to do it. The option to take photos offsite is acceptable. This person should be able to capture the essence of a diverse range of products, including je...

...looking for a talented developer to work on my existing music website. Key Requirements: - **Security Enhancements**: I need to bolster the site's defenses against hacking and ensure that the user login and authentication systems are rock solid. Ideal Skills and Experience: - Proficiency in Core PHP is a must, as the site is built on this technology. - A strong background in web security, with experience in protecting sites against common vulnerabilities. See the attachment for details. Ask all of your questions in the discussion board so everyone knows the question and answer. Please do not submit a fake bid amount and completion time as that will disqualify you. We can discuss everything in the clarification board. We will ...

...talented artist. The search has begun for an illustrator to create 14 single-page illustrations and a double-page spread for a kid's book titled 'How Jimmy Page Led Zeppelin'. The work would start June/July 2024, although looking to source an illustrator and get costing for the project now. Written in rhyming verse it follows a young Jimmy Page as he finds and learns the guitar, joins his first band, Art School, Session Work, The Yardbirds, and finally onto forming and leading one of the most successful bands in history - Led Zeppelin. The book will be illustrated for kids aged 5 to 10 with an attention to detail that parents will love. Guitars, Amps, Drums, Costumes, Albums, Stadiums and more. The ideal illust...

...data points like average sale price, number of sales and days on market. Here is a example website: As you can see on that page, there are all the communities. You can click "abacoa" for example in Jupiter communities (you probably have to make a fake login to check it out) but here you can see the top active properties in Abacoa neighborhood but most importantly there is a market report tab. This tab showcases the sold homes history in that neighborhood that is dynamic so that URL updates daily. Websites that look nice and list active MLS properties are basic but I want this neighborhood search + market report tab. Can you make this I plan on doing this for multiple areas and different MLS all over the nation. Key Requirements:

...skilled React and React Native developer to prioritize on web application development. Web App (React & Ant Design): Login/Register Page: User authentication and registration. Landing Page: Welcome page post-login. Create Record Page: Form to create a new record. Read Details of the Record Page: Display details of a specific record. Mobile App (React Native): Login/Register Page: User authentication and registration. Landing Page: Welcome page post-login. Read Details Page: Display details of a specific record (No create record page required). Additional Details: Figma designs will be provided. Clean and maintainable code is a must. Adherence to best practices in both React and React Native development...

I am seeking a freelance developer to lend me a helping hand here to complete a personal web project, which is a L2J server for a very small community of fans. The core web structure, including the registration page and forum, is in place. The tasks required are: - Configure owned control panel in a Debian machine, with an API for user registration, including email confirmation and password reset DB is in a different Debian host. - Connect owned forum to an OVH database,

...Features: - User Registration and Login: Users should be able to create accounts and log in to play. - Casino Games: A variety of casino games will be integrated into the app to keep users engaged. - Payment Integration: The app should have secure payment gateways for in-app purchases and withdrawals. - Admin Control: I need a separate admin login with the capability to: - Adjust game rules: The admin should have the power to tweak rules to improve user experience. - Change game outcomes: Admin should be able to modify game outcomes to keep the experience fair and engaging. - Manage user accounts: The ability to oversee and moderate user accounts is crucial. Design Preferences: - The user interface must be clean,...

Overview We are in search of an exceptionally talented designer to craft an innovative and intuitive mockup for a web application focused on optimizing the recruitment process for various users. It is crucial that the submitted designs are entirely original. Submissions that utilize pre-existing templates or closely mimic designs from platforms like ThemeForest will be outright rejected and may receive a negative review. The design must adhere to the features specified in our project outline while showcasing a distinct and fresh aesthetic. Design Requirements 1. User Management -User Registration/Login: Separate workflows for candidates and companies. Each form should gather specific information as per the provided documentation. Design should cl...

I need a professional PHP developer to update my current PHP script. The script currently uses PHP mailer to send emails using normal login (Less Secure Apps) authentication. The new Gmail security measures will require the use of Oauth for authentication. The ideal candidate should have: - Strong PHP skills and experience with PHP 7 - Expertise in PHPMailer and setting up email services, specifically Gmail - Solid understanding of OAuth authentication - Experience with updating scripts to accommodate new security measures - Good problem-solving skills to ensure the script remains fully functional post-update

...can create a Windows-based kiosk application to facilitate student registrations, check-ins, and attendance tracking in a learning school. This will be a user-friendly, touchscreen-based solution, with no requirement for integration with existing systems or databases. Key Features: - Student Registration: The application should allow for the quick and easy registration of new students. - Student Check-In: A reliable and efficient check-in system for students. - Attendance Tracking: Real-time attendance monitoring and tracking. Key Requirements: - Proficiency in Windows-based application development. - Experience in creating user-friendly and touchscreen-compatible interfaces. - Prior experience with kiosk applicati...

I am seeking a professional WordPress developer who can addr...developer who can address the issue that has recently emerged on my site's admin login page, preventing me from accessing my dashboard. The issue started less than a week ago and I have not installed any new plugins or themes, so it seems like the problem lies within the site's core functionality. Ideal candidates should have: - Proficiency in WordPress, specifically with troubleshooting and fixing login-related issues - A good eye for detail and the ability to work independently - Strong communication skills to be able to discuss the changes made and provide a clear explanation for the issue. If you think you're the right freelancer for this job, please get ...

...simple, yet effective design for a new product targeted at service professionals. The main goal of this design is to enhance product usability. Key Tasks: - Develop a seamless login process, which also allows for password retrieval. - Design an easy-to-use configuration feature, enabling users to tailor the application to their specific needs. - Implement an intuitive account management system to enable users to monitor and adjust their account settings. Ideal candidates should have prior experience in creating user interfaces that prioritize ease of use and functionality. A strong understanding of the needs and preferences of service professions specifically would be a significant advantage, but not required. Your design should not only be visually appeal...

...for a proficient Python developer to create a Session Initiation Protocol (SIP) client for specific platforms. This client will cater to Windows and Linux operating systems. Key Requirements: * The core capability of the Python SIP client will be to facilitate audio calling. Therefore, the developer must focus primarily on this function. * For safety and security, a basic username and password system will suffice for user authentication. Ideal Skills & Experience: * Proficiency in Python language is mandatory. * Prior experience in developing communication applications, specifically in SIP, will be beneficial. * An in-depth understanding of user authentication using basic username and password systems is required. * Familiarity with Windo...

Create Blazor Fluent UI template sample pages with login and account profile page

...prediction application with additional features crucial to its success. This includes a user registration/login system, real-time data analytics, and payment gateway integration. The app will also require seamless integration with specific game APIs such as live casino, betting, and potentially others. Key Requirements: - Development of a web-based color prediction application - Implementation of user registration/login system - Integration of real-time data analytics - Seamless payment gateway integration - Integration with live casino and betting game APIs - Potential for additional API integrations Ideal Skills: - Web development expertise (React.js, Node.js, etc.) - Strong experience with real-time data ...

Preciso de um desenvolvedor fullstack angular + Java + Postgresql spring boot para criar um website de vagas de emprego. O sistema terá as seguintes funcionalidades: Segurança: Cadastro e Login com keycloak Administrador: cadastrar pacotes de acesso (depois será integrado com o meio de pagamento, não neste momento), gerenciar categorias de empregos, listar usuários e visualizar adesões de pacotes. Visão usuário: Aderir a um pacote de acesso, listar vagas existentes, cadastrar currículo usando formulário, um dos campos será o próprio currículo em PDF. Visão empresa: Cadastrar vagas de emprego, visualizar candidatos em uma determinada vaga