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!

From 108,895 reviews, clients rate our RESTful API Developers 4.9 out of 5 stars.
Hire 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!

From 108,895 reviews, clients rate our RESTful API Developers 4.9 out of 5 stars.
Hire RESTful API Developers

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    I need an end-to-end web platform that lets travellers seamlessly reserve the services below in one place: • Hotels • Car rentals • Spa packages • Local tours The system must recognise three user roles—Guests, Service providers, and Admin—each with its own dashboard and permissions. Core flows include real-time availability search, price and inventory management for providers, secure checkout, and a clean admin console for oversight and reporting. I’m flexible on the tech stack, but modern, well-documented frameworks (think React or Vue on the front end, Node.js, Laravel, or similar on the back end) and RESTful or GraphQL APIs are preferred so the platform can scale. Payment gateway integration (Stripe, PayPal, or your recommended option) and ...

    $637 Average bid
    $637 Avg Bid
    261 bids

    Full-Stack Developer for MVP Website Monitoring and Audit Suite We are seeking a skilled Full-Stack Developer to create a Minimum Viable Product (MVP) for a website monitoring and audit suite. The ideal candidate will have experience with both front-end and back-end technologies to build a user-friendly and efficient platform. You will be responsible for designing, developing, and implementing features that allow users to monitor website performance and conduct audits effectively. Strong problem-solving skills and attention to detail are essential. If you are passionate about building innovative solutions, we would love to hear from you! Key Responsibilities: Scanner Engine: Build a resilient microservice using Puppeteer and the Lighthouse Engine capable of mobile-first emulation and hardw...

    $647 Average bid
    $647 Avg Bid
    30 bids

    I want to launch a lean, working MVP that lets users log their bills, receive due-date reminders, and see clear expense summaries. The product must be available both as a responsive web app and as a native Android app, with one shared back-end and database. Scope • Design – I do not have wireframes, so I will rely on you for a clean, intuitive UI/UX that feels consistent across web and Android. • Core build – Implement user sign-up/login, bill entry and editing, automated reminder scheduling (push / email), and a dashboard that aggregates expenses by category, date, and total. • Tech choice – I’m open to any modern stack you are comfortable with. Feel free to propose React, Angular, Vue, Flutter, Kotlin, or something else, as long as the final ...

    $130 Average bid
    $130 Avg Bid
    41 bids

    I need a small, self-contained Python backend that ingests local MP3 files and automatically extracts musical information. For every track the service must detect • BPM and time signature • Overall tempo as well as integrated loudness (LUFS or a comparable metric) • Phrase boundaries and sections of complete silence Once a file is processed the results have to be written to a single CSV file—one row per track, neatly formatted with column headers for each metric. No database or JSON output is required. A minimal REST or command-line interface that lets me submit a path to an MP3 and returns the processing status is enough; the core value is the signal-processing code itself. Please rely on well-known Python libraries such as librosa, Essentia, pydub or simil...

    $30 / hr Average bid
    $30 / hr Avg Bid
    145 bids

    I'm looking for an experienced Android app developer to create a simple yet functional app for ISON EYEWEAR. The app will be used by retailers to place orders, track order status, and manage their account details. An admin panel is required to manage products, stock, and view orders. Key Features: - Retailer Login: Secure authentication via email and password. - Order Placement: Intuitive interface for placing orders. - Order Tracking: Ability to track order status. - Product Information: Access to product images, descriptions, and stock availability. - Admin Management: Manage products and stock, view and process orders. Ideal Skills and Experience: - Proven experience in Android app development. - Strong UI/UX design skills for a simple, user-friendly interface. - Familiarity with...

    $314 Average bid
    $314 Avg Bid
    51 bids

    I need a seasoned backend developer to take full ownership of the server-side engine for a new ecommerce platform and stay on for ongoing maintenance as we scale. The scope begins with architecting a clean, well-documented API layer that powers the entire buyer journey—from browsing the catalogue and filling a cart, through checkout, payment, and post-purchase flows such as returns. In parallel, you’ll build out the seller pathway: onboarding, KYC verification, inventory sync, and order management. Key requirements • Robust cart, checkout, and return logic that can handle discounts, promotions, and edge-case calculations without breaking state. • Seamless Razorpay integration (cards, wallets, net-banking—all via Razorpay’s SDK and REST endpoints) with...

    $283 Average bid
    $283 Avg Bid
    97 bids

    The FIGMA for my credit-card-offers app is complete; now I need the server-side engine that will make the screens come alive. The scope is an MVP-ready backend built from scratch, including both the API layer and a brand-new database. The will work in sync with a browser extension being developed separately. I haven’t committed to a tech stack yet, so feel free to suggest Node.js, Python, Java, or another modern choice you’re comfortable maintaining. Whichever stack you choose, I expect. Need to develop both Android and iOS.

    $1115 Average bid
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    266 bids

    I have an existing e-commerce platform built with React.js and I’m ready to tighten things up so the shopping experience feels faster, cleaner, and more conversion-friendly. The core architecture is in place: React on the front end, a RESTful API feeding product data, and a payment gateway that already processes live orders. What’s missing is the polish that makes customers stay, browse, and check out without friction. Here’s what I need from you: review the current codebase, identify bottlenecks, and implement pragmatic improvements. That may include refactoring components for better state management, trimming bundle size, introducing code-splitting or lazy loading where it matters, and revisiting key screens—home, product detail, cart, and checkout—for a mo...

    $19 / hr Average bid
    $19 / hr Avg Bid
    299 bids

    Title: Senior Android Developer: Hybrid Computer Vision Pipeline (Local ML + Gemini API) Project Description: We are seeking a Senior Android Engineer to develop a modular, high-performance infrastructure for real-time video capture and analysis. The core of the project is a "Hybrid AI Routing Engine" that intelligently switches between on-device local processing and high-depth cloud analysis. This application is an R&D prototype that must be Play Store Ready, with a heavy focus on background stability, thermal management, and seamless connectivity transitions. Technical Specifications: 1. Camera Pipeline & Intelligent Routing: Implement CameraX to ensure maximum compatibility across various Android OEMs (Samsung, Pixel, Xiaomi, etc.). Develop a Routing Engine to in...

    $374 Average bid
    $374 Avg Bid
    81 bids

    I need a clean, well-documented Node.js solution that fetches JSON data from a specified API endpoint and turns it into a professionally formatted PDF made up exclusively of tables. The flow is straightforward: call the API, parse the JSON payload, map the fields to table columns, then render each table so it paginates gracefully and, when necessary, repeats headers across pages. Key points • Source data arrives solely from an API in JSON format—no manual entry or secondary feeds. • The PDF contains tables only; no images or free-form text blocks beyond table headers or footers you may add for clarity. • Any solid, maintained library is fine—pdfkit, Puppeteer, jsPDF, or a comparable Node.js toolset—as long as it supports custom styling (borders, alte...

    $52 Average bid
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    40 bids

    Project Overview: We are looking for an experienced iOS Engineer to build the core architecture of a Real-Time Computer Vision Application. The app requires a high-performance video pipeline that captures frames, runs local inference (CoreML), and selectively sends data to a Cloud LLM API. This is a pure engineering challenge. We need clean, modular code that handles concurrency, thermal management, and hardware switching without draining the battery instantly. Phase 1 Scope (MVP): You will build a functional "Skeleton App" focusing on performance and stability using the internal camera. Key Technical Requirements: Advanced Camera & Audio Pipeline (AVFoundation): Implement a robust AVCaptureSession to handle video buffers (CMSampleBuffer). CRITICAL: The architecture mus...

    $171 Average bid
    $171 Avg Bid
    61 bids

    I’m building an internal business tool and need an experienced .NET Core developer who can work during the India night shift (roughly 9 PM–5 AM IST). The project centers on a browser-based web application, so you’ll spend most of your time inside ASP.NET Core, Entity Framework, and SQL Server, wiring up clean MVC or Razor Pages, setting up dependency injection, and testing endpoints with Postman or Swagger. You’ll collaborate directly with me over Teams for quick stand-ups and code reviews, pushing updates to a Git repository each night. I already have wireframes, a partial domain model, and an Azure DevOps board with user stories ready for you; your first tasks will involve refining the data layer, implementing responsive views, and tightening up API endpoints. D...

    $19 / hr Average bid
    $19 / hr Avg Bid
    56 bids

    I’m refreshing my GitHub profile for upcoming university applications and I need a concise, well-architected Django backend that illustrates how I approach data modelling, API design and clean code. Tech stack is fixed: Python 3.x with Django (latest LTS). Because this is a portfolio piece, clarity, documentation and sensible project structure matter more than production-grade scaling or DevOps extras. Scope of the system The app should let authenticated users track items in and out of stock and generate simple reports. I expect models for items, categories and basic stock movements, JWT or session-based authentication, and a small reporting module summarising current inventory levels and movement history. Deliverables • Django project and apps organised with reusable, ...

    $26 Average bid
    $26 Avg Bid
    20 bids

    I need an end-to-end web application written in pure Go, backed by a MySQL database. The core focus is clean, idiomatic code that can be compiled and deployed on a standard Linux server without fuss. You’re free to structure the project with popular Go web frameworks such as Gin, Echo, or Fiber, as long as the final build remains lightweight and easy to maintain. I will supply server access and a blank MySQL instance; you take it from there—designing the schema, wiring up the handlers, and exposing routes that follow REST principles. Code quality, straightforward error handling, and secure interaction with the database are priorities. If you prefer containerisation, feel welcome to include a Dockerfile so the whole stack can spin up locally with a single command. Deliverables...

    $466 Average bid
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    166 bids

    I’m building a new mobile application and I need a robust Java Spring Boot backend to power it. The core services you’ll create must cover: • User authentication and management with full multi-factor authentication (MFA) and support for future multi-party authentication flows. • A streamlined customer-onboarding journey that begins with registration and ends with a verified, fully profiled user record. • Reliable data storage and retrieval using a relational engine—MySQL or PostgreSQL, whichever you are most comfortable optimising. RESTful APIs should be documented with Swagger/OpenAPI, secured with JWT or a similarly strong token strategy, and thoroughly unit- and integration-tested. I’ll provide the mobile team’s contract-first API s...

    $7 / hr Average bid
    $7 / hr Avg Bid
    31 bids

    ## 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 * ...

    $21 / hr Average bid
    $21 / hr Avg Bid
    192 bids

    I’m looking for an experienced full-stack partner to build a web-based ecosystem that covers both our public-facing site and an internal workflow hub. The solution should include: • Public website connected to a searchable university database. • Student portal for application tracking and secure document upload/management. • Staff CRM featuring a student-management dashboard, task management, document control, and automated email/SMS notifications. Laravel or Django on the back end and React or Vue on the front end suit us best, with PostgreSQL or MySQL beneath. Clean RESTful APIs for third-party email/SMS services are essential. Show me links to CRM or portal projects you have delivered, outline the stack you’d use, and provide a realistic schedule and ...

    $626 Average bid
    $626 Avg Bid
    164 bids
    AI-Powered React Laravel CMS
    14 hours left
    Verified

    I’m looking to get a small-scale CMS online fast. The front end must be built with React while the back end runs on Laravel. I’m comfortable if you lean on AI coding assistants to accelerate the build; the priority is clean, well-structured code that I can maintain later. Core expectations • A standard CRUD workflow for pages and posts, served through a straightforward React interface. • RESTful APIs (Laravel Sanctum or Passport is fine) with token-based auth so the front end stays decoupled. • Basic role and user management baked in from the start. • Solid, developer-readable documentation that explains local setup, environment variables, and deployment steps. Once everything is pushed, I’ll run the project locally and on a staging server;...

    $197 Average bid
    $197 Avg Bid
    60 bids

    We are building a recruitment website using Base44 (no-code/low-code platform) and need to integrate it bidirectionally with JobAdder CRM via their REST tasks: Set up OAuth2 Authorisation Code flow authentication (mandatory – JobAdder API requires this; developers must have proven experience). Pull active job listings from JobAdder (GET /jobs endpoints) and display them dynamically on the website (e.g., searchable job board). Handle candidate application submissions from website forms: Create candidates (POST /candidates), attach resumes, and link applications (POST /jobapplications). Use Base44's workspace integrations (prefer OpenAPI spec import if possible) or backend functions for API calls. Ensure clean, secure implementation with error handling, token refresh,...

    $112 Average bid
    $112 Avg Bid
    69 bids

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