API Development & Integrations

APIs that feel like part of your product — not an obstacle

An API is a contract — a promise that if you send this request, you'll get that response, reliably, every time. When that contract is well-designed, everything built on top of it just works. When it's not, every team consuming it wastes time working around its quirks.

We design and build APIs that are predictable, consistent and a pleasure to integrate with: clear endpoints, stable response shapes, meaningful errors, and documentation that lets developers get productive fast — and then mostly stay out of the docs because everything behaves the way you'd expect.

What we build

• Backend-for-frontend (BFF) services — tailored APIs that give each frontend exactly the data it needs in exactly the shape it needs — no over-fetching, no under-fetching, no leaking domain complexity.
• Third-party integrations — robust connectors between your systems and payment providers, CRMs, ERPs, shipping platforms, analytics tools or any external service that needs to talk to your application.
• Public and partner APIs — platform-ready APIs for external developers, with proper versioning, rate limiting, authentication and developer-friendly documentation and onboarding flows.
• Microservices — well-bounded, independently deployable services that communicate via clear, well-defined APIs — whether you're decomposing a monolith or extending an existing architecture.

Getting the fundamentals right

The framework matters less than the engineering principles behind it. Every API we build ships with:

• Authentication & authorization — secure, standards-based auth (OAuth2, JWT, sessions) with clear permission models.
• Rate limiting & throttling — to protect your infrastructure and ensure fair usage across clients.
• Versioning strategy — so you can evolve your API without breaking existing consumers.
• Monitoring & observability — metrics, logging and tracing so you see issues before your users do.

Details that separate a good API from a frustrating one

• Request validation with clear error messages
• Correct HTTP status codes that reflect what actually happened
• Pagination that still works at very large data volumes
• Idempotency so retries are safe and don't create duplicates or inconsistent state
• Structured error responses that clearly say what went wrong and how to fix it

Funding your project with LIAA co-financing

Many of these projects can qualify for LIAA co-financing of up to 50% under the "Support for business process digitalization" programme. BITBOX is an implementation partner — we build the solution, you apply for the grant, and we help prepare the application end to end. Approval and the final amount are decided by LIAA.