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G-AxiosSoftware
Service

API Development

Well-documented APIs and integration layers that connect internal systems, partners and mobile clients through stable, versioned and observable contracts.

Deliverables
4
Typical stack
Node.js · GraphQL · REST
Outcome
Connect systems and partners through interfaces that stay stable as you grow.
Scope this service
Scope

What this covers

The capabilities we bring together for a typical engagement. Each one is delivered by the same team that scoped the work.

API design
Authentication
Versioning strategy
Third-party integration
Webhooks
Developer documentation
Deliverables

What you receive

Each engagement ends with artefacts you own and can operate without us. Nothing important is left only in our heads.

01

API specification

A written document reviewed with your team and signed off before implementation is committed.

02

Implemented services

The production software itself, deployed to the agreed environments with configuration under version control.

03

Developer portal

Operational and developer guidance, maintained alongside the code rather than written once at the end.

04

Integration test suite

Documented interfaces and automated release configuration that your team retains and can operate.

Technology

The stack we would start from

Tools with long support horizons and broad hiring pools. We will work inside an existing stack where that is the right call.

Node.jsGraphQLRESTOpenAPIPostgreSQLRedis
Reference architecture

Typical architecture

A layered view of how a system like this is usually assembled. The exact shape is decided during architecture, not assumed at the start.

Edge

Traffic terminates at the edge. Static assets and cacheable responses are served close to the user rather than from origin.

  • Web client
  • Mobile client
  • Partner systems
Gateway

One authenticated entry point applies policy, quotas and schema validation before any internal service is called.

  • API gateway
  • Authentication
  • Rate limiting
  • Request validation
Application

Business rules live in domain services that can be deployed, scaled and replaced independently of one another.

  • Domain services
  • Background workers
  • Integrations
  • AI services
Data

State is versioned, encrypted and backed up, with read replicas carrying reporting and analytics load away from the primary.

  • Primary database
  • Read replicas
  • Object storage
  • Analytics warehouse
Delivery

How we deliver it

The same six stages run on every engagement. They are compressed or extended to fit the scope, but none is skipped.

  1. 01

    Discover

    We meet the people who will use the system, map the current process, and agree on what success looks like in measurable terms before any code is written.

    1-2 weeks
  2. 02

    Architect

    We turn requirements into a technical plan: system boundaries, data model, integration points and the trade-offs we are consciously accepting.

    2-3 weeks
  3. 03

    Design

    Flows become screens. We design the interface, the states and the edge cases, then validate the important paths with the people who will rely on them.

    2-4 weeks
  4. 04

    Engineer

    We build in short, reviewable increments with automated tests and continuous integration, so progress stays visible and the system is deployable throughout.

    6-16 weeks
  5. 05

    Test

    Beyond unit tests, we verify performance, accessibility, security and failure behaviour, including what happens when a dependency is slow or unavailable.

    2-3 weeks
  6. 06

    Launch

    We deploy to production, watch the metrics closely through the first days, and hand over documentation and training so your team can operate the system confidently.

    1-2 weeks
Related work

Systems we have built near this

Selected case studies where the same disciplines were applied. All project content on this site is demo data.

Demo case studiesAll work
desk.ai/assistant

Reconcile last week’s supplier invoices.

ai desk

Matched 148 invoices, flagged 6 variance exceptions for approval, and posted the remainder to the ledger.

4 approvals1.8s94% confident
Ask anything about this workflow…
AI2025

AI Desk

AI Business Automation Platform

AI Desk is a demo AI automation platform that routes documents and requests through guardrailed workflows, escalating to a person whenever human approval is required.

  • Next.js
  • TypeScript
  • Node.js
  • PostgreSQL
Documents processed
140k
Documents processed
Automated decisions
61%
Automated decisions
Case study
wms.epico.app/inventory

SKUs

26,041

99.4% accurate

Picking

-33%

Backorders

12

Steel bearing 6204412
Hydraulic seal kit86
Drive belt V-221,204
Sensor module X258
ERP2023

EPICO Warehouse

Warehouse Management System

EPICO Warehouse is a demo warehouse management system that tracks every unit from goods-in to dispatch, pairing barcode workflows with a single stock ledger and purchasing tools.

  • Next.js
  • TypeScript
  • PostgreSQL
  • Redis
SKUs managed
26,000
SKUs managed
Stock accuracy
99.4%
Stock accuracy
Case study
Questions

Common questions

The questions we are asked most often before an engagement starts.

If your question is not answered here, ask it directly. We would rather spend twenty minutes clarifying than produce a proposal built on assumptions.

Ask a different question

The work is built from the capabilities below. We agree which of them are in scope during discovery and record anything deliberately left out, so the boundary is explicit.

  • API design
  • Authentication
  • Versioning strategy
  • Third-party integration
  • Webhooks
  • Developer documentation

Related solutions

Other things we build

Offering catalogues rarely stand alone. These are the services most often combined with this one.

Next step

Ready to scope this?

A short conversation is usually enough to tell whether the work is well defined. If it is, we will propose a fixed-scope discovery with a clear end point.

Start a ProjectSee our work
Reply within one business day
Scoped proposal, fixed discovery
NDA and security review welcome