REST API design
Resource-oriented endpoints, validation, errors, pagination and clear request/response formats.
APIs and integrations that connect the parts of your product.
I build and integrate APIs for web products, automation and internal workflows. That can mean a new REST API, connecting a third-party service, handling webhooks or creating the backend layer between a frontend and your data.
When it fits
Useful when a product needs stable contracts between systems instead of one-off scripts or manual data movement.
Typical stack
Go · Gin · Python · FastAPI · PostgreSQL · Redis · REST · JSON · JWT · OAuth · Webhooks · Docker
What I can deliver
Practical scope, clear implementation.
The exact combination depends on the project. These are the areas I can cover directly.
Third-party integrations
External APIs for payments, email, identity, analytics or business systems.
Webhooks
Secure webhook receivers, verification, idempotency and retry-aware processing.
Authentication
JWT, OAuth and scoped access patterns appropriate to the service.
Data workflows
Import, export, transformations and background processing for larger jobs.
Documentation
Readable endpoint documentation and implementation notes for future integration work.
Process
From scope to working delivery.
1
Map the flow
We identify the systems, data, trigger points and failure cases.
2
Build the contract
I define and implement the endpoints or integration boundary.
3
Test the edges
I cover validation, retries, duplicate delivery and common external-service failures.
Pricing
Request an estimate ↗Get a clear quote before development starts.
Small focused tasks can start from $150. Websites, features and integrations typically start from $400. Larger MVP and custom backend work starts from around $1,200, depending on scope.
FAQ
Common questions
Can you integrate a payment provider?+
Yes, where the provider is available for your business and region. I can implement server-side API calls, webhook processing and subscription-related backend flows.
Can you consume an existing API?+
Yes. I can build the integration layer, normalize data and handle authentication, errors and retries.
Do you document the API?+
Yes. The exact format depends on the project, but endpoint contracts and integration expectations are documented.
Can the API be used by a future mobile app?+
Yes. If that is a likely direction, the API can be structured independently from the current web frontend.
Related services
Other ways I can help
Have a project in mind?
Start a project ↗