API Development & Integration Services
APIs are how software talks to software. I design and build REST APIs that are secure, predictable and well-documented — and connect your product to the outside world: payments, email, AI services and anything else with an interface.
API development
- REST API design — consistent resources, predictable responses, sensible status codes and versioning
- Authentication — JWT-based auth flows, token refresh and role-based access, done securely
- Documentation — endpoint references your future developers (and future you) can work from
- Rate limiting and validation — protecting endpoints from abuse and bad data
For a real example, Lafzloom is built around a Django REST API with JWT auth, and LAHAN Hub coordinates many applications through shared API patterns.
Integrations
- Payment gateways — adding online payments and webhooks reliably
- Email and messaging — transactional email, notifications and verification flows
- AI and LLM services — chatbots, content features and AI-powered workflows (see my Python development work)
- Third-party data — consuming external APIs with proper error handling and retry logic
Integration hygiene
Most integration pain is self-inflicted: secrets committed to repos, no error handling when the other service is down, webhooks that assume success. I treat external services as unreliable by default and build accordingly, so a payment gateway outage doesn't corrupt your data.
Where I work
API work is fully remote-friendly; I've delivered it for products in Nepal and for teams abroad. Clear written documentation matters most when your developer isn't in the next room — so that's the standard.
Frequently asked questions
Can you integrate an API we already use?
Yes, if it has public documentation. I've integrated payment, email, AI and data services. If the tool has no API at all, I'll tell you before charging anything.
Do you document the APIs you build?
Yes — every endpoint, with request/response examples. Documentation is part of the deliverable, not an optional extra.
How do you handle API security?
Authentication on every non-public endpoint, validation of all input, secrets kept out of the codebase, rate limiting where appropriate, and least-privilege access rules.
Can you review or fix our existing API?
Yes — audits of existing APIs (security, structure, performance) are a good starting engagement if you're not ready for a rebuild.
Need APIs that don't break?
Tell me what needs to connect to what. You'll get a clear plan for endpoints, auth and documentation.