API Development: Systems That Talk to Each Other Reliably
REST, GraphQL and third-party integrations, each with documentation.
When third-party systems are poorly connected, you get errors, duplicate work and follow-up questions in support. We build APIs and integrations that keep running even when one of the systems changes.
Bad interfaces cost time, money and patience
Undocumented APIs, fragile integrations and missing versioning all lead to the same result: every change in one system breaks another. We build interfaces with a fixed contract, documentation and versions. We have run the LANXESS procurement catalog system, with more than 5 million items, since 2014. That would not work without stable interfaces.
- ERP
- CRM
- APIfixed contract, documentation, versions
- Online store
- Third-party software
API services
REST APIs
We build REST APIs with consistent endpoints and documentation that other teams can work with.
GraphQL
With GraphQL, the client requests exactly the data it needs. That saves requests and load time.
System integration
We connect existing systems and third-party software, for example ERP, CRM or your online store.
API features
Security and performance
- OAuth 2.0 and JWT authentication
- Rate limiting and caching
- HTTPS/TLS encryption
- API gateway integration
Developer experience
- OpenAPI/Swagger documentation
- API versioning
- SDK generation
- Postman collections
Technology stack
All technologiesBackend
- Node.js / Express
- NestJS
- FastAPI
Databases
- PostgreSQL
- MongoDB
- Redis
Security
- OAuth 2.0
- JWT
- API Gateway
API testing and monitoring
Testing
- Unit and integration tests
- Load testing
- Security testing
- Contract testing
Monitoring
- Performance monitoring
- Error tracking
- Usage analytics
- Uptime monitoring
Interfaces that don't slow your team down
In a free 30-minute intro call, we look at your systems and interfaces together. Afterward, you know where the biggest bottleneck is and where we would start. We work in English and German.
Jens Bohl Founder and Managing Director