API Development and Integration Services

Integration debt is the most expensive kind of technical debt because it compounds across teams. Every point-to-point connection someone wires up in a hurry becomes a dependency nobody owns, breaks silently when an upstream field changes, and makes the next integration harder. The organisations that move fastest are not the ones with the most APIs — they are the ones whose APIs are designed, versioned, documented and monitored as products in their own right.

We treat API work in two halves. Building APIs: contract-first design where the OpenAPI or GraphQL schema is agreed before implementation, with consistent resource naming, sane pagination, cursor stability, idempotency keys on writes, structured error envelopes, and a versioning policy that lets you evolve without breaking consumers. Integrating systems: connecting ERPs, CRMs, payment processors, carriers, identity providers and data warehouses behind an anti-corruption layer, so a vendor's schema change becomes a contained fix rather than a cross-team incident.

Reliability is where most integrations quietly fail. We build in exponential backoff with jitter, circuit breakers around every third-party dependency, dead-letter queues for poison messages, replayable event logs, and idempotent consumers so an at-least-once delivery guarantee does not translate into duplicate charges. Every integration ships with synthetic monitoring that exercises the real path on a schedule, so you find out from an alert rather than from a customer.

Deliverables include the running service, generated and hosted documentation, a Postman or Bruno collection, contract tests in CI, and a runbook covering the specific failure modes of each dependency. Whoever inherits it can operate it.