RESTful API stands for Representational State Transfer Application Programming Interface, a term coined by Roy Fielding in 2000. A RESTful API allows an application to communicate with other applications. It is based on the structure of a website, where the data and information are stored in the form of resources. RESTful APIs make use of these resources to provide a certain level of accessibility and data exchange between different systems. This makes web development more efficient, as resources can be accessed easily and quickly.

A RESTful API Developer is responsible for designing and developing APIs to facilitate communication between different applications. The Developer will use their existing skills in web development to create APIs that are secure and reliable, that can provide clients with the ability to access resources for different types of usage. The Developer will also ensure that the APIs are well documented so that any updates or changes to their backend programming environment don't cause any disruptions with existing communication workflows.

Here's some projects that our expert RESTful API Developer made real:

  • Creating browser extensions using Microsoft Graph API
  • Building webpages for flight searches & results
  • Developing applications for React Native in PHP
  • Retrieving data through various APIs, presenting it in a table format & sending email notifications
  • Developing & integrating simple authentication functions into Laravel apps
  • Integrating WordPress REST APIs into mobile apps via PHP
  • Building middleware systems to convert HTTP GET requests into REST calls
  • Developing programs in C# .NET using the WordPressPCL Package Library
  • Developing cloud services programs using Cloud Flare's API
  • Creating tools to trigger Customer orders with CSV file uploads

At Freelancer.com, our RESTful API Developers are highly experienced professionals dedicated to delivering innovative solutions that meet our clients' specific needs! Our Developers have successfully completed various projects for a wide range of clients, enabling quick and secure data exchange between applications. If you’re looking for an experienced developer to create an efficient, reliable and secure API system, then post your project now and hire the most suitable API developer here on Freelancer.com!

De 105,760 opiniones, los clientes califican nuestro RESTful API Developers 4.9 de un total de 5 estrellas.
Contratar a RESTful API Developers

RESTful API stands for Representational State Transfer Application Programming Interface, a term coined by Roy Fielding in 2000. A RESTful API allows an application to communicate with other applications. It is based on the structure of a website, where the data and information are stored in the form of resources. RESTful APIs make use of these resources to provide a certain level of accessibility and data exchange between different systems. This makes web development more efficient, as resources can be accessed easily and quickly.

A RESTful API Developer is responsible for designing and developing APIs to facilitate communication between different applications. The Developer will use their existing skills in web development to create APIs that are secure and reliable, that can provide clients with the ability to access resources for different types of usage. The Developer will also ensure that the APIs are well documented so that any updates or changes to their backend programming environment don't cause any disruptions with existing communication workflows.

Here's some projects that our expert RESTful API Developer made real:

  • Creating browser extensions using Microsoft Graph API
  • Building webpages for flight searches & results
  • Developing applications for React Native in PHP
  • Retrieving data through various APIs, presenting it in a table format & sending email notifications
  • Developing & integrating simple authentication functions into Laravel apps
  • Integrating WordPress REST APIs into mobile apps via PHP
  • Building middleware systems to convert HTTP GET requests into REST calls
  • Developing programs in C# .NET using the WordPressPCL Package Library
  • Developing cloud services programs using Cloud Flare's API
  • Creating tools to trigger Customer orders with CSV file uploads

At Freelancer.com, our RESTful API Developers are highly experienced professionals dedicated to delivering innovative solutions that meet our clients' specific needs! Our Developers have successfully completed various projects for a wide range of clients, enabling quick and secure data exchange between applications. If you’re looking for an experienced developer to create an efficient, reliable and secure API system, then post your project now and hire the most suitable API developer here on Freelancer.com!

De 105,760 opiniones, los clientes califican nuestro RESTful API Developers 4.9 de un total de 5 estrellas.
Contratar a RESTful API Developers

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    20 trabajos encontrados

    3. FRONTEND – ESPECIFICACIONES El frontend deberá desarrollarse en React (preferentemente ) e incluir un editor visual basado en canvas ( o ). El estilo de la plataforma web es similar a la Web Pixory Funcionalidades: - Editor de páginas con vista doble (spread) con tamaño de hoja formato A4 - Drag & drop de imágenes - Redimensionamiento, rotación y recorte - Inserción de texto y formas - Sistema de capas - Zoom y navegación - Indicadores visuales de sangrado, margen de seguridad y centro del libro - Soporte para imágenes que ocupen doble página - Validación de calidad de imagen (DPI en tiempo real) - Sistema de plantillas editables - Organización automática básica de fotos (por fecha EXI...

    $467 Average bid
    $467 Oferta promedio
    108 ofertas

    I’m rolling out a new feature that touches both ends of our stack. On the backend we run Java 21 with Spring Boot micro-services, alongside a small Node.js/Python layer that exchanges events through Kafka. The frontend is split between an older Angular module and a newer React interface. The job is to design and code the complete feature, wiring it cleanly into every affected service and UI surface. You will: • Extend (or create) the relevant Spring Boot endpoints, making sure they publish and consume the right Kafka topics. • Update the Angular dashboard and the React SPA so the user experience is seamless across both frameworks. • Keep code idiomatic, unit-tested, and pushed to our Git repo via pull requests. Acceptance criteria • All API tests pass in ...

    $13 / hr Average bid
    $13 / hr Oferta promedio
    83 ofertas

    We are building a web application where users can upload PDF files into folders and manage them. The project is mostly developed (frontend and backend are already in place), but it is currently not working end-to-end due to deployment and integration issues. The main requirement is to fix the existing system and make the complete flow work properly in production. This includes ensuring that the backend API is correctly deployed, all routes are active, and the file upload functionality works as expected. The expected working flow is: User uploads a file → file is stored on the server → file details are saved in the database → API returns a proper response → file appears in the frontend UI → file remains available after refresh. In addition to fixing the upload fl...

    $19 Average bid
    $19 Oferta promedio
    44 ofertas
    Laravel REST API
    5 días left

    I am a Laravel developer and I offer a complete REST API development service. I will build a fully functional Laravel API with CRUD operations and a secure authentication system for your application. This service is ideal if you need a ready-to-use backend that can be connected to any web or mobile application. What I offer: Complete Laravel REST API development Full CRUD operations (Create, Read, Update, Delete) Secure authentication system (Laravel Sanctum or JWT) User registration and login system Token-based protected routes Input validation and error handling Clean, structured and maintainable code Database migrations included Production-ready API This service is perfect for: Web applications Mobile apps (Flutter / React Native) Admin dashboards SaaS projects Price: $20 (Fixed Pric...

    $26 Average bid
    $26 Oferta promedio
    65 ofertas

    I dont have have my page layouts sketched in Figma; need to design figma and then I need the whole site taken from design to a live, fully-functioning business website. The stack is non-negotiable: MongoDB, Express, React and Node.js. You’ll translate the Figma files into a responsive React front end, wire it to a clean RESTful Express/Node back end and persist data in MongoDB. Once everything is tested, I want you to deploy it so the public URL is up and running, complete with SSL and basic monitoring. Along the way, please keep the repo on Git (each feature in its own branch) and push updates so I can follow progress. At hand-off I expect: • Source code with clear README • Environment variables documented • Deployed production link plus credentials for a...

    $288 Average bid
    $288 Oferta promedio
    60 ofertas

    我需要一位靠谱的全栈开发者,为我的餐饮连锁店完成一套基于 Web 的门店管理系统,并部署到云服务器。下面是核心范围: • 收银模块 —— 对接支付宝、微信等主流支付,并尽量实现自动分账; • 会员管理 —— 会员档案、储值、等级、优惠券; • 预约管理 —— 在线预订座位与包厢,实时更新状态; • 积分商城 ——   - 积分获取规则   - 积分兑换商品 • 数据看板 —— 日常营业额、客流、菜品排名等关键指标可视化; • 包厢管理 —— 包厢排期、状态、最低消费; • 小程序端 —— 为顾客提供下单、预约及积分查询入口。 我们已完成后台的部分前端页面,代码与设计稿可供参考;你需要对接接口或在现有框架上补全功能。请使用常见技术栈(如 Node.js / Java / Python + MySQL/PostgreSQL)并预留 RESTful API,以便后续扩展。 交付要求: 1. 代码托管在 Git(含规范的 README 与部署文档); 2. 基本单元测试与简单性能测试; 3. 云服务器部署脚本及环境说明; 4. 简短视频或文档演示主要操作流程。 项目时间并不非常紧,但质量必须可靠、结构清晰、易于维护。我倾向于分阶段验收:原型 → 核心功能 → 全量上线。请在提案中说明你过往的相关案例、拟用技术、预计周期以及任何对接所需的前置条件。

    $431 Average bid
    $431 Oferta promedio
    18 ofertas
    Custom CRM–MYOB Invoicing API
    5 días left
    Verificado

    I want to wire our in-house CRM directly into MYOB AccountRight so that users can press “Create invoice” and see the document appear instantly in MYOB, ready to email to the customer. The scope is deliberately lean: for this first milestone the API only has to create and send invoices with some reporting required. Environment & tech • Our CRM is custom built, so you will be working with a clean REST interface on our side. • Authentication into our stack is OAuth 2.0; the same flow should be used when talking to MYOB’s cloud endpoints. • MYOB AccountRight API documentation and sandbox credentials are ready for you. Deliverables • A documented REST endpoint in our CRM that accepts invoice data and pushes it to MYOB AccountRight. • All supporti...

    $12 / hr Average bid
    $12 / hr Oferta promedio
    107 ofertas

    I need a skilled Flutter developer to create a utility mobile app. The app should be compatible with both iOS and Android platforms. You must be located in Australia, and even better Victoria. Requirements: - Expertise in Flutter development - Proficiency in deploying on both iOS and Android - Strong problem-solving skills - Ability to deliver clean, maintainable code Ideal Skills: - Flutter framework - Dart programming language - Mobile app development lifecycle - Familiarity with RESTful APIs - Knowledge of app store submission processes Looking for someone who can look at the existing code from a previous company that has stepped away from software development. The project has some minor errors that need rectification. Succeed with this task and another new project is ready to start...

    $23 / hr Average bid
    $23 / hr Oferta promedio
    232 ofertas

    I need a custom WordPress plugin that connects my WooCommerce store to the ProgressionLIVE logistics platform through their public API. The goal is to keep both systems perfectly aligned and to let my customers see live delivery updates without any manual work from my team. Core requirements • Automatically push new WooCommerce orders (including customer details and all order information) to ProgressionLIVE as soon as they are placed. • Pull inventory changes from ProgressionLIVE back into WooCommerce so stock levels remain accurate. • Receive real-time status callbacks from ProgressionLIVE and update each WooCommerce order’s “Order notes” and status accordingly (processing, dispatched, in-transit, delivered, etc.). Technical pointers • Wor...

    $481 Average bid
    $481 Oferta promedio
    242 ofertas
    Java Text Parsing API
    4 días left
    Verificado

    I need a Java backend API that receives raw text, parses it according to configurable rules, and returns clean, structured JSON. The service acts purely as a data-processing engine inside a broader micro-services environment, so the focus is speed, accuracy, and a clean REST design. Scope of work • Set up a lightweight Spring Boot (or comparable) project with clear separation between controller, service, and parser layers. • Build the core parsing module: regex- or grammar-based, rule driven, and easily extendable without code rewrites. • Expose REST endpoints (e.g., POST /parse) that accept text payloads up to 5 KB and respond in under 200 ms on standard hardware. • Write unit and integration tests targeting edge cases and performance. • Produce an Open...

    $12 / hr Average bid
    $12 / hr Oferta promedio
    44 ofertas

    I need a hands-on Oracle Fusion technical consultant to create and deploy custom APIs inside the Supply Chain Management cloud module. The focus is API development for reliable data integration between Fusion SCM and two external systems we run in-house. Your job starts with reviewing our current data model, then designing secure REST (and, where required, SOAP) services that move sales orders, inventory updates, and shipment confirmations in real time. You should be fully comfortable with Oracle Integration Cloud, Fusion Web Services, FBDI, role-based security, and the usual JSON/XML payload handling. I will supply a dedicated test pod, data-mapping spreadsheets, and Git access. We will meet online twice a week to review progress, and code must be committed through our repo so our inter...

    $265 Average bid
    $265 Oferta promedio
    11 ofertas
    Mitel API Call Stats Integration
    3 días left
    Verificado

    I need a clean, well-documented connection to the Mitel API that pulls three metrics—call duration, number of calls, and caller ID information—on demand. My end goal is to feed these figures into a web dashboard, which I’ll be building in PHP, so please structure the output as easily consumable JSON or a lightweight REST endpoint I can drop straight into the interface. You just have to start the connection, I will then make all the scripts/pages to show the stats I need, you just help to get the train going, so to speak. I myself will do all the heavy lifting. I just need help to get started. Here’s the flow I’m picturing: • Your code authenticates with Mitel, respects any rate limits, and retrieves the chosen statistics in near-real time. • Resu...

    $140 Average bid
    $140 Oferta promedio
    185 ofertas

    I need an experienced developer to create a full-featured e-commerce web application that lets customers browse a catalog, add items to a cart, and complete a secure checkout. The stack is flexible—React or Vue on the front end and Node.js, Django, or a comparable framework on the back end—as long as it delivers a fast, responsive experience across desktop and mobile. The build should include user authentication, product and inventory management, payment-gateway integration (Stripe or PayPal), order tracking, and an admin dashboard. Clean, well-documented code, RESTful APIs, and deployment to a cloud platform such as AWS or Heroku are part of the brief. Deliverables: • Complete source code in a Git repository • Live, deployed application with SSL enabled • ...

    $538 Average bid
    $538 Oferta promedio
    249 ofertas
    Logistics Aggregator Platform
    2 días left
    Verificado

    I’m building a logistics aggregator whose core purpose is shipment tracking for individual consumers. The platform should let a user create a shipment record, watch its progress in real-time on a map, and receive automated notifications—email, SMS, or in-app—whenever the status changes. Each parcel must also maintain a detailed shipment history that customers can revisit at any time. The job spans front-end and back-end work: database design for parcels and events, carrier API integrations to pull live location data, and a responsive interface that feels effortless on mobile and desktop. I already have rough wireframes; your task is to turn them into a secure, production-ready application with a clean REST or GraphQL layer that future mobile apps can reuse. Deliverables...

    $20 / hr Average bid
    $20 / hr Oferta promedio
    81 ofertas

    TITLE: Full-Stack Developer Needed — Enterprise QR-Based Room Dining & Ordering Platform for Hospitality --- OVERVIEW We are building an enterprise-grade, QR code-driven room dining and ordering platform for deployment across luxury hotel properties in India. This is not a one-off project — it is the foundation of a scalable hospitality SaaS product that will grow in scope and capability over time. We are looking for a serious, experienced full-stack developer who can build this to production standards from the ground up. The immediate use case: guests in a hotel room scan a QR code, which opens a web application showing the property's restaurant menu. They browse, select items, manage their cart, and place an order. The order is then dispatched to the hotel's...

    $316 Average bid
    $316 Oferta promedio
    87 ofertas
    Full-Stack Web App Development
    1 día left
    Verificado

    I’m ready to kick-off a brand-new web application and need a seasoned full-stack developer who can take it from concept to launch. The core goal is to build a completely new application, not just patch or extend an existing codebase. I’ll share the high-level product vision, user flows, and design references; you’ll translate them into a stable, scalable solution. Key expectations • Architect the back-end (language and framework are open—let me know your strongest stack) and set up a clean, modular front-end. • Handle all API integration needs, whether that’s third-party services or custom REST/GraphQL endpoints. • Write concise, well-documented code and maintain a Git workflow that lets us track progress easily. • Communicate clea...

    $52 / hr Average bid
    $52 / hr Oferta promedio
    157 ofertas
    Legacy MVC to .NET Core API -- 2
    1 día left
    Verificado

    I need to migrate several legacy .NET MVC controller classes into a clean, versioned RESTful API built on .NET Core. The goal is to keep every existing feature running exactly as it does today while modernising the stack and adopting current design standards and best practices. Scope The original controllers encapsulate business logic, data access and some inline validation. Your job is to refactor this code into a layered .NET Core Web API project that follows REST conventions, uses dependency injection, async/await throughout and separates concerns (controllers, services, repositories, DTOs). Authentication must be switched to stateless JWT tokens generated and validated inside the new API. start your proposal with the word ' My Tasks' I will provide the full legacy project...

    $122 Average bid
    $122 Oferta promedio
    85 ofertas

    I’ve built a web app with Claude and the interface is complete. What’s left is the server-side polish: wiring up the remaining API endpoints and adding a secure user-authentication layer. All data is held in an in-memory database, so the hooks you create need to read from and write to that store seamlessly. You’ll get full access to the current Claude-generated backend stubs, the finished front-end, and a staging environment on my existing site. Your task is to complete the missing API development work, implement robust login/session management, and push the code to the production branch so I can launch. Deliverables • Fully functional API endpoints connected to the front-end • Secure sign-up, login, token refresh, and logout flows • Clean integration...

    $1062 Average bid
    $1062 Oferta promedio
    305 ofertas

    A new payroll-style web application is about to enter active development and I’m building a pool of freelance talent who can step in on an hourly basis as the project evolves. I need mid-level engineers (roughly two to five years of hands-on experience) across three stacks—PHP, Python and Node.js—to handle feature sprints, API work and general maintenance as requirements come up. For the PHP side you’ll need confidence in both Laravel and CodeIgniter as well as solid MySQL know-how. Python contributors should be comfortable in Django or Flask and have a track record of clean RESTful API design. If you favour JavaScript, expertise and experience crafting secure, well-documented REST endpoints is essential. Real-world exposure to payroll or HR systems is a plus beca...

    $10 / hr Average bid
    $10 / hr Oferta promedio
    91 ofertas

    I’m building a lightweight website that lets a visitor pick a departure and arrival station from simple drop-down menus, calls the National Rail Enquiries API in the background, and instantly shows the live train schedule for that route. With one click, the displayed timetable should be converted to a neatly formatted PDF the user can download or print. Core flow • Visitor chooses “From” and “To” stations (no free-text typing, the stations must load as selectable values). • The site queries National Rail Enquiries in real time, retrieving trains between the chosen stations along with departure, arrival, platform and intermediate stop times. • Results appear on page and a “Save as PDF” button renders exactly what’s shown in...

    $11 Average bid
    $11 Oferta promedio
    22 ofertas

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