Services API Development & Integration
Software Development

API DEVELOPMENT & INTEGRATION

APIs that do what they should: reliable, well-documented, properly tested.

Day rate
£900/day
Category
Software Development
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Overview
A poorly designed API creates problems that compound over time: inconsistent responses, missing error handling, documentation that does not match the implementation. I have built and integrated APIs across e-commerce platforms, marketing tools, payment systems, and SaaS products. Good API design is not complicated. It requires consistency, clear contracts, proper versioning, and honest documentation. I bring that discipline whether I am building a new API from scratch or integrating your systems with a third-party service.
My approach
I design the API contract before implementation: the endpoints, request and response shapes, error codes, and authentication approach. For integrations I start with the third-party documentation and then test against the actual service, because the documentation is often incomplete or out of date. I write integration tests that give you confidence the connection keeps working after changes on either side.
What you get
  • → API architecture design
  • → RESTful/GraphQL API development
  • → API documentation (OpenAPI/Swagger)
  • → Authentication and security
  • → Rate limiting and monitoring
  • → Third-party integrations
  • → Testing
  • → Deployment
Deliverables
  • → Deployed API
  • → API documentation
  • → Integration guides
  • → Testing suite
  • → Monitoring setup
Ideal for
  • → Businesses needing system integration
  • → Mobile app backends
  • → SaaS platforms
  • → Companies building ecosystems
  • → Organizations modernizing systems
Tools & tech

Django REST Framework, FastAPI, PostgreSQL, Redis, Docker, AWS

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