Expert REST API Developer for Scalable Backend Integrations

We are looking for an experienced REST API Developer to design and build a secure, scalable and well structured backend API system that powers our web and mobile applications. The ideal developer must understand real world API architecture, performance optimization, authentication workflows, database modeling and error handling.

You will work closely with our frontend and mobile teams to create clean and consistent API endpoints that support dynamic user experiences. The project includes designing resource structures, building CRUD services, implementing access control, creating background processes, optimizing database queries and ensuring every endpoint is documented clearly.

This role requires an understanding of how real production environments behave. You must be comfortable handling large datasets, avoiding bottlenecks, securing sensitive data, structuring code for long term maintenance and ensuring the backend serves fast responses even under load. Experience with Node, Laravel or similar backend frameworks will be valuable.

If you can turn business requirements into powerful backend logic and build APIs that are stable, predictable and well documented, this project will be a great fit for you.

✅ KEY RESPONSIBILITIES

Build secure REST API endpoints for web and mobile use

Design logical resource structures and routing

Integrate MySQL, PostgreSQL or MongoDB

Implement authentication using JWT or token based access

Create CRUD operations with validation and error handling

Build services for filtering, pagination and sorting

Implement rate limiting and request throttling

Optimize database queries for performance

Integrate external APIs such as payment or messaging services

Log backend events and errors with clear structure

Write API documentation for frontend teams

Handle versioning and backwards compatibility

Deploy backend to server or cloud environment

Work with frontend teams to ensure smooth data flow

Deliver milestone based updates with reliable communication

✅ REQUIRED SKILLS

Strong understanding of REST API architecture

Expertise in Node or Laravel or similar backend frameworks

Proficiency in JavaScript or PHP

Experience with MySQL, PostgreSQL or MongoDB

Comfortable with authentication using JWT or OAuth

Strong knowledge of data modeling and validation

Ability to optimize APIs for low response times

Experience integrating external third party services

Understanding of error handling and logging

Familiarity with Git version control

Experience with Postman or Insomnia for testing

Knowledge of security best practices

Ability to design clean code architecture

Strong debugging and problem solving skills

Portfolio of past API based projects

✅ TOOLS AND TECHNOLOGIES

Node or Laravel backend

Express or Nest or Laravel routing

MySQL, PostgreSQL or MongoDB

Postman or Insomnia

JSON response standards

JWT authentication

Redis for caching

GitHub or GitLab

Docker optional

Nginx for deployments

✅ DETAILED TECHNICAL BREAKDOWN

Core Competencies

The API must follow a clean routing pattern, use consistent JSON responses, avoid repeating logic and follow an organized folder structure for controllers, services and models.

Technical Workflow

Plan entity relationships and resource endpoints

Create secure authentication and authorization layers

Build versioned APIs for future changes

Implement caching for frequently accessed data

Apply validation before processing any request

Add detailed logs for errors and warnings

Test each endpoint thoroughly with realistic payloads

Best Practices

Use consistent naming for routes

Separate business logic from route handlers

Use environment variables for sensitive data

Minimize heavy database operations

Ensure predictable response structures for frontend integration

Simple Code Example

const loadOrders = async userId => {

  try {

    const orders = await OrderModel.find({ userId: userId })

    return orders

  } catch (error) {

    console.log("Order fetch error", error)

    return []

  }

}

✅ SERVICE TYPES AND SPECIALIZATIONS

Full REST API development from scratch

API integration with frontend and mobile apps

Database design and optimization

Payment gateway integration

Authentication and access control

Microservices and modular architecture

Cloud deployment and monitoring

Long term backend maintenance

✅ DELIVERABLES

Fully functional REST API backend

Database schema and optimized queries

Documentation for all endpoints

Authentication and role based access

Logging and monitoring setup

API versioning system

Deployment ready package

Two revision cycles

Support for two to four weeks after launch

✅ BUDGET OPTIONS

Hourly rate: 30 to 85 dollars

Project based price: 3000 to 18000 dollars

Monthly retainer: 2000 to 7000 dollars

✅ TIMELINE

Requirement planning: 3 to 5 days

API development: 1 to 3 weeks

Database and performance optimization: 4 to 7 days

Testing and documentation: 1 week

Deployment and launch: 2 to 4 days

Timeline varies based on feature count and integration complexity.

✅ SUCCESS METRICS AND KPIs

Fast API response time under two hundred milliseconds

Clean and consistent response structures

Zero major production errors

Secure authentication with no vulnerabilities

High uptime and stable performance

Positive feedback from frontend and mobile teams

Smooth integration across platforms

✅ CALL TO ACTION

If you are an experienced REST API Developer who builds secure, fast and scalable backend systems, we invite you to submit your proposal.

Include examples of past API projects, your development approach, expected timeline and pricing.

We respond to detailed proposals within twenty four hours.