Custom API Development

Oluwaloseyi Adeleye

Starting at

$

30

/hr

About this service

Summary

I design and develop secure, scalable backend systems and APIs for web, mobile, and blockchain apps. I deliver high-performance solutions that are reliable, well-documented, and built for growth, helping businesses turn complex ideas into working technology.

What's included

  • Fully Functional Backend API

    RESTful or GraphQL API endpoints, Proper input validation & error handling as required

  • Database Design & Setup

    Optimized schema handling (SQL or NoSQL), Migrations & seed data (if required)

  • Business Logic Implementation

    Core features tailored to project requirements, Custom workflows and automation rules as discussed

  • Authentication & Authorization

    Secure login/registration system, Role-based access control (RBAC) or token-based auth (JWT/OAuth2)

  • Documentation

    API reference (Swagger / Postman Collection) Setup & deployment guide (README)

Skills and tools

Backend Engineer

Software Engineer

Fullstack Engineer

ExpressJS

ExpressJS

FastAPI

FastAPI

GraphQL

GraphQL

Node.js

Node.js

TypeScript

TypeScript