Cresslink Solutions
Backend & API Engineering
The part of the system users never see and the business cannot operate without. Backends engineered to be correct under load, recoverable after failure and comprehensible to the next engineer.
What We Build
Systems in this area
- REST and GraphQL APIs with versioning and documentation
- Database design, migration and optimisation
- Authentication and authorisation systems
- Background processing, queues and scheduled work
- Third-party integrations and webhook infrastructure
Good Fit When
You should talk to us if
- You have an interface but no dependable system behind it
- You need to expose your data or capabilities to partners
- Your current backend fails in ways nobody can explain
Engineering Focus
What we get right in this area.
The decisions that separate a system that holds up from one that merely launches.
Data integrity
Constraints and transactions enforced in the database, not assumed in application code.
Idempotency
Payment, webhook and retry paths engineered so repeated delivery cannot double-charge or duplicate work.
Observability
Structured logging, metrics and tracing so production questions have answers.
Failure handling
Timeouts, retries and backoff on every external call.
Applied In