Backend and API Development

Backend and API development covers the data model, business rules, background jobs and documented endpoints that screens, mobile apps and integrations all read from. Every front end then follows the same rules.

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When it is scoped on its own

Several front ends

A web app, a mobile app and a dealer portal need the same rules and the same data. The backend is built once.

An app over an old system

The database exists, but there is no safe way to expose it to a new app. An API layer is added in front of it.

Growth that slows reports

Reports that were quick at ten thousand rows take long at ten million. Indexes and queries are reviewed.

What the build contains

The data model

Tables and relationships fit your business, with constraints that keep bad data out. A weak model spreads into every screen built on it, and is costly to correct later.

Rules in one place

A discount limit is written once. Every screen and app applies it.

Background jobs

Reminders, exports and nightly totals run outside the user’s request, so nobody waits at a screen while they finish.

What makes the API easy to build against

Matching documentation

Documents are generated from the code, so they cannot drift from the behaviour of the endpoints they describe. Examples are tested too.

Predictable errors

Errors come in the same shape every time, with a message a developer can act on.

Versioning

An old app still in the field keeps working while the new one moves ahead.

FAQ

Frequently asked questions

Can backend work start before the screens are designed?

Yes, and often it should, when several front ends share the same rules. The data model and endpoints are settled first, and screens are built against them.

Do you work with our existing database?

Usually. The schema is read, anything unsafe to change is noted, and the API is built over it. Where the model blocks the work, a staged change is proposed first.

How does it stay fast as records grow?

Through indexes, query plans and pagination from the start, followed by load tests on realistic volumes. A report over a decade of invoices is tested with that many invoices.

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