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Anil MauryaSoftware · AI · Automation
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Backend & Cloud Engineering

REST API Development

Well-designed, documented APIs that other systems can rely on.

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Typical timeline
3-8 weeks depending on surface area
Category
Backend & Cloud Engineering
Engagement
Fixed-scope phases
You receive
Code, data & documentation

Overview

An API is a contract. Once another system depends on it, every change becomes a negotiation, which is why design and versioning discipline matter more here than almost anywhere else in a codebase. We build APIs intended to be integrated against for years.

The problem

Your API is undocumented and changes break your integrators

Endpoints grew organically with inconsistent naming, unclear error responses and no version strategy. Every integration partner asks the same questions, every change risks breaking someone's code, and nobody is quite sure who is calling what.

You will recognise this if

  • Integration partners repeatedly ask for clarification because there is no documentation
  • A change to the API breaks someone's working integration
  • Error responses are inconsistent and unhelpful
  • There is no way to see who is calling which endpoint, or how often

Enquire about rest api development

Tell us briefly what you need. We reply within one working day.

We reply within one working day. No spam, and we never share your details.

What you get out of it

The difference this makes

Integrations that take days, not weeks

Accurate generated documentation with examples and a test environment lets a partner integrate without a single meeting.

Changes without breakage

Versioning and deprecation policy mean you can evolve the API while existing consumers keep working.

Protected against abuse

Authentication, rate limits and request validation keep one misbehaving client from affecting everyone else.

Visibility into usage

Per-client metrics show who uses what, which informs both capacity planning and deprecation decisions.

What we build

  • Resource-oriented design with consistent naming and HTTP semantics
  • OpenAPI 3 specification with generated interactive documentation
  • Versioning strategy with a documented deprecation policy
  • Authentication options: API keys, JWT, OAuth 2.0 client credentials
  • Per-client rate limiting and quota enforcement
  • Consistent, machine-readable error responses with correlation IDs
  • Pagination, filtering, sorting and sparse field selection
  • Webhooks with signature verification and retry for outbound events
  • Idempotency key support for safe retries on write operations
  • Sandbox environment with test data for integrators

How it gets used

A product exposing an API to customers

A documented public API with key management, quotas and a sandbox, so customers can build integrations without support involvement.

A mobile and web front end on one backend

One API serving both clients, versioned so older app installations continue working after a release.

A B2B data exchange

Partner-facing endpoints with authentication, audit logging and webhooks for event notification.

Technology we typically use

You do not need to care about this list — but your next developer will.

  • FastAPI / Spring Boot
  • OpenAPI 3
  • PostgreSQL
  • Redis
  • JWT / OAuth 2.0
  • API gateway

Timeline: Typically 3-8 weeks depending on surface area

Questions

REST API Development — common questions

Something else on your mind? Ask us directly — it is usually faster than reading.

REST or GraphQL?
REST for most business APIs: simpler to cache, document, secure and reason about, and every integrator already understands it. GraphQL earns its complexity when clients need widely varying shapes of the same data — typically a mature product with several demanding front ends. We will recommend whichever genuinely fits.
How do you version an API?
A version in the URL path, which is the most transparent approach for integrators. Additive changes go into the current version; breaking changes create a new one, with the previous version supported for a published period.
Do you provide documentation we can give to clients?
Yes. Generated interactive documentation with request and response examples, authentication instructions and error reference, hosted on your own domain.

Related services

Businesses that need this often need one of these as well.

Python & FastAPI DevelopmentFast, well-tested backend services that hold up under real load.API Integration ServicesMake the systems you already pay for talk to each other.Database Architecture & DesignGet the data model right, because everything else depends on it.Cloud Deployment & HostingDeploy properly: monitored, backed up, and inexpensive to run.

Thinking about rest api development?

Tell us about your situation. We will tell you whether this is the right service, what it would involve, and roughly what it would cost.

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