API development & integration · EonTech
Interfaces other systems can trust.
We design and build APIs as products in their own right. Clear contracts, real security, calm versioning, and observability that shows you exactly what is happening in production.
GET /v1/orders/8842
Authorization: Bearer •••
200 OK
{
"id": "8842",
"status": "shipped",
"trace": "a91f…"
}What we build
The right protocol for each consumer
We are not dogmatic about transport. We choose per use case and let them coexist behind a coherent gateway, so each consumer gets the interface that suits it.
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REST
Resource-oriented HTTP APIs with sane status codes, pagination, and idempotency. The default that every client already understands.
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GraphQL
One typed schema, precise queries, no over-fetching. We add depth limits and persisted queries so flexibility never becomes a liability.
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gRPC
Low-latency, strongly typed service-to-service calls over HTTP/2. Streaming and contract-first schemas for high-throughput internal traffic.
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Webhooks & events
Signed, retried, replayable event delivery. Consumers stay in sync without polling, and you keep an audit of every dispatch.
How we govern
Four disciplines that keep an API healthy
- 01
Contract first
We agree the schema before code. OpenAPI or protobuf becomes the single source of truth that clients and servers both generate from.
- 02
Security baked in
OAuth 2.0, scoped tokens, rate limits, and input validation at the edge. Authorisation is enforced per resource, not per route by accident.
- 03
Versioning without breakage
Additive change by default, deprecation windows when needed. Consumers get warning headers long before anything is removed.
- 04
Observable by default
Structured logs, traces, and per-endpoint metrics from day one. You see latency and error budgets before a customer reports them.
Integration
Connect anything, depend on nothing brittle
Third-party services change without warning. Rate limits move, fields get renamed, an endpoint goes dark. When that leaks into your product code, every outage becomes your outage.
We wrap each integration behind a stable internal contract with retries, circuit breakers, and replayable events. Your product talks to one steady interface, whatever happens upstream.
See how we run it in productionEngineering questions
What teams ask the architects
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REST, GraphQL, or gRPC for our case?
It depends on the consumers. Public and partner APIs usually favour REST or GraphQL. High-volume internal traffic favours gRPC. We pick per use case, and they coexist happily.
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Can you integrate with our existing systems?
Yes. We connect to payment providers, CRMs, ERPs, and legacy databases behind a clean façade, so your product code never depends on a third party's quirks.
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How do you keep an API from breaking clients?
Contract tests run in CI against the published schema. Changes are additive by default, and any deprecation ships with headers and a window so consumers migrate calmly.
Treat your API as a product
Bring us the systems you need to connect or the platform you want to open up. We will design the contract and ship an interface your integrators actually enjoy using.