API development and integrations.
We design and build APIs and system integrations with Node.js. We write the contract first, so the front end, your partners and the tests all work from the same description.
> tell us the problem, the users and the deadline.
Who it is for
Products that depend on a backend they can trust.
- Web and mobile apps that need a backend built.
- Systems that must talk to payments, a CRM, an ERP or partner services.
- APIs that grew without a contract and now break the people who call them.
- Products that need real-time updates on top of an API.
What we build
The parts of an API that decide whether it lasts.
Contract-first design
The API described in OpenAPI before the code, so it can be reviewed, mocked, documented and tested.
Authentication and authorization
Who is calling, and what they may touch, checked on every object, with tests for the "user A reads user B" case.
One error shape and a change policy
Consistent errors, and a written idea of what counts as a breaking change and how much notice is given.
Third-party integrations
Timeouts, retries with backoff, idempotency, and webhook handling that survives duplicates and late events.
Real-time features
WebSocket messaging and WebRTC signaling alongside the API, where the product needs live updates or calls.
Documentation and tests
Reference generated from the contract, contract and integration tests, and logs and metrics you can act on.
How we work
Agree the contract, then build against it.
- 01
Callers and contract
Who calls the API, how stable it must be for each of them, and a written contract you approve.
- 02
Build against it
A mock from the contract lets the front end start while the backend is built. Working demos at each milestone.
- 03
Test what matters
Contract and integration tests, authorization tests, and load tests for the busiest endpoints.
- 04
Run it
Structured logs with request IDs, metrics for latency and errors, and documentation your callers can use.
Stack
Node.js, with the pieces around it.
Backend
- Node.js APIs
- REST and OpenAPI
- MongoDB
Integrations
- Payments and third-party services
- Webhooks
- Existing systems
Real-time
- WebSocket messaging
- WebRTC signaling
- LiveKit, mediasoup or Janus
Delivery
- Cloud deployment
- Monitoring and logging
Worth knowing
How to get a useful estimate.
Send us the brief below
The callers, the resources, the integrations, the authentication model and the non-functional needs. We describe what a good brief contains in full.
Push back is a feature
We will point out gaps in the contract before we price it. It is cheaper for both of us than finding them in production.
Where we are, honestly
Time zones and working hours.
US-registered company; engineering team based in Pakistan. We work Mon – Fri, 9:00 AM – 6:00 PM PKT (UTC+5). That day ends about when a New York morning begins, so live overlap with US Eastern is short and with the UK and Europe is much longer. We can shift our hours by agreement to overlap more with your team. Ask us for a concrete schedule before you commit, and ask every other vendor the same.
FAQ
Questions people ask first.
- Do we need an API specification for a small project?
- Even a one-page description of the resources, the errors and the authentication saves rework. Use the full format when other teams or partners will call the API. See what to specify.
- REST, GraphQL or gRPC?
- REST with a good OpenAPI description is our default, because it is well understood and works everywhere. GraphQL suits many clients that shape their own queries, and gRPC suits internal service-to-service calls.
- Can you integrate with our existing systems?
- Yes. We ask for the documentation and a test environment early, since integrations usually set the schedule more than features do.
- Can you fix an API that already exists?
- Often. We would start by writing down the contract it actually has, then decide what to fix first and how to change it without breaking the people who call it.
- Can you add real-time features?
- Yes: WebSocket messaging for chat, presence and live updates, and WebRTC for calls and live video.
Start here
Tell us the problem, the users and the deadline.
We will reply with the questions we would ask before writing any code.