API architecture
Resource modelling, predictable URLs, correct HTTP methods and status codes, and consistent naming.
Core Development
RESTful API Development
Secure, well-documented REST APIs that connect your frontends, mobile apps and partners. Designed as products, versioned with care and built to evolve without breaking the clients that depend on them.
HTTP/1.1 422 Unprocessable Content
Content-Type: application/problem+json
{
"type": "https://api.example.com/errors/validation",
"title": "Validation failed",
"status": 422,
"errors": [
{ "field": "email", "code": "invalid_format" }
]
}01 · Overview
APIs treated as products, not plumbing
An API is a contract. Once other teams, apps or partners depend on it, every inconsistency becomes expensive to fix. We design resources, URLs, status codes and error formats deliberately, write the specification first and review it with the people who will use it.
We build with Django REST Framework, FastAPI and Node.js, generate OpenAPI documentation from the code and test every endpoint automatically. Authentication, rate limiting, pagination and versioning are designed in from the start rather than bolted on later.
Focus areas
- Clean REST architecture
- JWT and OAuth 2.0 authentication
- Rate limiting and caching
- OpenAPI documentation
Technologies
- Django REST Framework
- FastAPI
- Node.js and Express
- PostgreSQL
- OpenAPI and Swagger UI
- Redis
02 · Capabilities
What we deliver
Every part of an API that developers rely on, designed and documented properly.
Authentication and authorisation
API keys, JWT and OAuth 2.0 flows, scopes and per-object permissions enforced on the server.
Validation and error handling
Strict request validation and a single documented error format based on problem details (RFC 9457).
Documentation
OpenAPI specifications with interactive docs, examples and changelogs, generated from code so they stay accurate.
Versioning and deprecation
Clear versioning, deprecation notices and migration guides so clients can upgrade on their own schedule.
Third-party integrations
Webhooks, partner APIs and payment providers integrated with signature checks, retries and audit trails.
03 · Approach
Specification first, then code
A test-driven approach that gives consumers a working, documented API early and keeps it stable as it grows.
-
01
Planning and specification
Resources, endpoints and authentication agreed in an OpenAPI draft.
- Resource modelling
- Endpoint design
- Auth strategy
- OpenAPI draft
-
02
Core development
Endpoints implemented with validation, caching and limits in place.
- Route implementation
- Validation and serialisers
- Caching
- Rate limiting
-
03
Testing and documentation
Automated tests and generated documentation that stay in sync.
- Unit and contract tests
- Load testing
- Generated docs
- Client examples
-
04
Deployment and monitoring
Automated releases with health checks and usage visibility.
- CI/CD pipeline
- Health checks
- Request logs and metrics
- Post-launch support
04 · Technical considerations
The details that decide success
Good APIs are defined as much by their edge cases as by their happy paths.
- Pagination and filtering
- Cursor-based pagination for large or fast-changing collections, with consistent filtering and sorting parameters.
- Idempotent writes
- Idempotency keys on requests such as payments and orders, so client retries never create duplicates.
- Caching
- ETags, Cache-Control headers and server-side caching reduce load without serving stale data.
- Rate limiting
- Per-client limits with clear 429 responses and Retry-After headers protect the service from abuse and accidents.
- Backward compatibility
- Additive changes by default, contract tests in CI and a documented policy for breaking changes.
- Security
- HTTPS only, deliberate CORS configuration, security headers and review against the OWASP API Security Top 10.
05 · Outcomes
What you can expect
- A consistent API that is easy to consume
- Accurate documentation developers trust
- Safe evolution without breaking clients
- Visibility into usage, errors and latency
Do you follow REST standards?
Yes. We use resource-oriented URLs, correct HTTP methods and status codes, content negotiation and a consistent error format. We add hypermedia links where they help clients, and can support formats such as JSON:API when required.
How long does API development take?
A core API with authentication and documentation typically takes two to four weeks. APIs with webhooks, complex filtering and substantial business logic usually take five to ten weeks. We ship a working first version early and iterate.
How do you handle versioning and backward compatibility?
We version through the URL or headers, prefer additive changes, and announce deprecations well in advance with migration notes. Older versions stay available for a transition period agreed with you.
How do you secure an API?
HTTPS everywhere, strong authentication, scoped permissions, input validation, rate limiting, careful CORS settings and security headers, reviewed against the OWASP API Security Top 10.
Do you provide API documentation?
Yes. Interactive OpenAPI documentation covering endpoints, parameters, examples, authentication and error codes, regenerated automatically with every release.
Related services
Often paired with
Backend Development
Application architecture, business logic, background jobs and integrations that hold up under load.
Mobile App Development
Native and cross-platform iOS and Android apps, from first release to ongoing maintenance.
Code Review & Refactoring
Independent code audits and safe, test-backed refactoring that pays down technical debt.
Connect your systems with a solid API
Tell us who will consume the API and what it needs to do. We will propose a design and a delivery plan.