API Development & Integrations
We design and build APIs that are predictable, secure and a pleasure to integrate with. Connect systems — CRM, ERP, payments, shipping, analytics — so data flows where it's needed.
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
Frequently Asked Questions
How much does API development cost?
A simple internal API with 5–10 endpoints — €3,000–6,000. A mid-complexity integration with an existing system (e.g. Horizon or SAP) — €6,000–15,000. A public platform API with documentation, versioning and a developer portal — from €15,000. We always start with a technical audit and give a concrete quote.
REST or GraphQL?
REST is simpler and familiar to every team. GraphQL shines when the frontend needs flexible field selection across multiple resources in one request. The right choice comes from understanding your use case, not following trends.
Can you integrate our system with [specific service]?
Usually yes. We work with Stripe, PayPal, Swedbank Gateway, Omniva, DPD, Venipak, Horizon, Jumis, 1C, Microsoft Dynamics, HubSpot, Pipedrive, Salesforce, Google Ads, Facebook Ads and other popular services. For anything outside that list — tell us which service and we'll check its integration options.
