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Aixo LabAixo Lab

REST API Development

We design and build enterprise REST APIs — resource modeling, authentication, versioning, and rate limiting architected as long-term contracts, not endpoints assembled to make one client work.

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  • REST
  • OAuth 2.0
  • Rate Limiting
  • OpenAPI Docs
  • Versioned APIs
Overview

Our approach

We design and build enterprise REST APIs — resource modeling, authentication, versioning, and rate limiting architected as long-term contracts, not endpoints assembled to make one client work.

  • The Contract Between Systems

    An API is the interface every other system depends on — designed deliberately, not whatever shape the first client happened to need.

  • Built for Longevity

    Versioning decided up front so new capabilities ship without breaking every client already integrated.

  • Secure by Design

    Authentication and authorization built on audited patterns, not a token check added wherever it seemed necessary.

  • Predictable at Scale

    Rate limiting and pagination designed for the traffic the API will actually see, not just the traffic it sees in a demo.

  • Documented, Not Guessed

    OpenAPI specifications that stay accurate, so integrating with the API doesn't require reading the source code.

  • Observable in Production

    Visibility into what the API is actually doing — latency, error rates, and usage patterns — not just whether it's up.

What's Included

Everything under one roof

Everything included in this engagement, from architecture to long-term support — one team, one system.

Public APIs

APIs exposed to external developers, designed for a client you don't control and can't assume behaves well.

Private APIs

Internal-only APIs for services within your own systems, with lighter authentication overhead where it's genuinely safe.

Partner APIs

APIs for a defined set of business partners, with access control and rate limits scoped per partner.

Mobile Backend APIs

APIs designed around mobile constraints — payload size, offline sync, and connection reliability.

Marketplace APIs

APIs handling listings, transactions, and search for two-sided marketplace platforms.

AI APIs

APIs that expose AI features — streaming responses, tool calls — through a stable, versioned contract.

Payment APIs

APIs handling payment and subscription flows with the auditability and idempotency real money requires.

Authentication APIs

Dedicated identity and authentication services that other APIs and applications depend on.

Webhook Systems

Outbound event delivery with retries and signature verification, so consumers can trust what they receive.

Microservices APIs

APIs at service boundaries designed for internal consumption, with contracts as disciplined as any public API.
Why Aixo Lab

Why companies choose Aixo Lab

  1. We Design Resources, Not Just Endpoints

    Every API is modeled around the actual domain resources and their relationships, not routes bolted on as features get requested.

  2. We Treat API Contracts as Long-Term Commitments

    Versioning and backward compatibility are architecture decisions made up front, because breaking a client that isn't yours to fix is expensive.

  3. We Build Security and Rate Limiting In From Day One

    Authentication, authorization, and rate limiting are part of the initial design, not a hardening pass before launch.

  4. We Document APIs as Part of the Build

    OpenAPI specs are generated and verified alongside the code, so documentation never drifts from what the API actually does.

  5. We Hand Off Code Your Team Can Own

    Clear architecture and documentation mean your own engineers — or ours, later — can extend this API without archaeology.

Our Capabilities

Our REST API Capabilities

The specific technical capabilities behind every API engagement — not a generic feature list, the actual engineering surface we work in daily.

REST API Design

Resource-oriented endpoints with consistent naming and behavior, designed around the domain rather than the database schema.

API-first Architecture

The API designed and agreed on before client code is written, so frontend and backend teams can build in parallel.

Authentication

Identity verification built on audited patterns, chosen based on who's actually calling the API.

OAuth 2.0

Delegated authorization for third-party access, implemented against the actual flow the client needs — not every flow at once.

JWT

Stateless token-based authentication for APIs that need to scale without a shared session store.

Versioning

A versioning strategy decided before the first breaking change is needed, not improvised under pressure.

Pagination

Consistent pagination patterns that stay performant as result sets grow past what a single response can hold.

Filtering

Query parameters designed for the actual ways clients need to narrow results, not every field exposed by default.

Rate Limiting

Limits that protect the system under real load, with clear client-facing signals rather than silent failures.

Validation

Input validation at the API boundary, so bad data is rejected clearly instead of causing failures deeper in the system.

Error Handling

Consistent, structured error responses that tell a client what went wrong and what to do about it.

API Documentation

OpenAPI specifications generated from the code and kept accurate, not written once and left to drift.

Webhooks

Reliable outbound event delivery with retries, signing, and delivery guarantees clients can depend on.

Scalability

An architecture that holds up as request volume, data size, and client count all grow together.

Monitoring

Visibility into latency, error rates, and usage patterns — the difference between debugging and guessing.
Process

How we work

The same disciplined process behind every engagement, from the first architecture decision to launch.

  1. 01
    Discovery

    Understand the business problem and its real constraints.

    Output:
    Scope and goals document
    Your involvement:
    Initial workshop
  2. 02
    Product definition

    Translate the problem into concrete product requirements.

    Output:
    Feature spec and priorities
    Your involvement:
    Requirements review
  3. 03
    UX/UI design

    Design user flows and interface before development starts.

    Output:
    Wireframes and design system
    Your involvement:
    Design feedback
  4. 04
    Technical architecture

    Define system structure, data flow, and technology stack.

    Output:
    Architecture document
    Your involvement:
    Technical review (optional)
  5. 05
    Iterative development

    Build in short cycles with visible, regular progress.

    Output:
    Regularly shipped working versions
    Your involvement:
    Sprint review participation
  6. 06
    Quality assurance

    Test functionality, performance, and security before release.

    Output:
    Test results and fixes
    Your involvement:
    Acceptance sign-off
  7. 07
    Launch

    Deploy to production with a rollback plan in place.

    Output:
    Product deployed to production
    Your involvement:
    Launch approval
  8. 08
    Continuous improvement

    Monitor, maintain, and evolve the product after launch.

    Output:
    Maintenance and improvement roadmap
    Your involvement:
    Regular check-in meetings
Technology Stack

Built on a modern, production-grade stack

Every technology here is a deliberate choice, not a default.

Node.js

A backend runtime well suited to high-concurrency APIs and streaming responses.

Laravel

An enterprise backend framework with strong conventions for resource-oriented API design.

Next.js

A full-stack framework for APIs that need to be paired directly with a React frontend.

React Native

The mobile client layer that consumes APIs designed around mobile constraints.

OpenAI

AI model access exposed through the same API design discipline as any other capability.

PostgreSQL

The relational database of choice for APIs that need strong data integrity guarantees.

Redis

Caching and rate-limit counters for APIs that need speed a database alone can't provide.

Docker

Containerized builds for consistent environments across development, staging, and production.

AWS

Cloud infrastructure for APIs that need more control than a managed platform alone provides.

Swagger/OpenAPI

The specification format used to document and validate every API we build.

JWT

Stateless token authentication for APIs that need to scale without a shared session store.

OAuth 2.0

The standard authorization framework for delegated, third-party API access.

REST

The architectural style underlying every API we design — resources, verbs, and stateless requests.

JSON

The data format every API we build uses for requests and responses.
API Engineering

API Engineering

The engineering decisions that determine whether an API stays reliable, secure, and maintainable as it grows, not just at launch.

API-first Design

The contract designed and agreed on before implementation begins, so client and server work can proceed in parallel.

Resource Modelling

Endpoints structured around real domain resources and their relationships, not a thin wrapper over database tables.

Versioning

A deliberate strategy for introducing breaking changes without stranding clients already integrated.

Security

Authentication, authorization, and input validation built to the same standard as the rest of the system.

Rate Limiting

Request limits sized to real capacity, with clear headers and responses so clients can adapt instead of guessing.

Caching

Response and data caching applied where it actually reduces load, with explicit invalidation rather than hoping it expires in time.

Idempotency

Safe retry behavior for operations that shouldn't execute twice, especially anywhere money or state changes are involved.

Observability

Structured logging, tracing, and metrics that make production behavior visible instead of inferred.

Testing

Contract and integration tests that catch breaking changes before a client does.

Documentation

Specifications generated from the code and verified against it, not written once and left to go stale.

Monitoring

Dashboards and alerts on the metrics that actually indicate a problem, not noise nobody looks at.
Representative Solutions

Where this technology fits

Reference architectures from our Representative Solutions collection that could plausibly be built on this stack.

Restaurant Management Platform
Representative Solution

Restaurant Management Platform

Hospitality Software
Property Management Cloud
Representative Solution

Property Management Cloud

Real Estate
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