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Connections other teams can trust

API & Backend Development

Every modern product is a conversation between systems: your app, your website, your partners, your payment provider. When the API behind it is slow, undocumented or changes without warning, everyone feels it.

We design APIs around a written contract, secure them properly, protect them with limits and watch them in production, so apps and partners can build on them with confidence.

We can build a new back end, tidy an existing one or connect the tools you already use.

A list of API endpoints with methods, access scopes, a rate limit gauge, response times, API docs and safe change checks
  • 11+Years of building business software
  • 50+Global long-term clients
  • 2,000+Projects delivered
  • 24 hrsResponse time on queries

What a good API needs

Six parts of a dependable API

Missing any one of them shows up later as support work.

  • Plug icon

    Design the contract

    Resources, errors and versions agreed in an OpenAPI description before code is written.

    Contract
  • Lock icon

    Secure access

    OAuth 2.0, API keys and scopes, so each caller sees only what it should.

    Access
  • Gauge icon

    Protect the service

    Rate limits, quotas and caching keep one noisy client from hurting the rest.

    Limits
  • File icon

    Document everything

    Interactive docs, examples and a changelog that developers actually use.

    Docs
  • Eye icon

    Watch it run

    Logs, metrics and alerts per endpoint and per client.

    Monitor
  • Swap icon

    Change safely

    Versioning, deprecation notices and contract tests so updates do not break callers.

    Evolve

Services

Our API & Backend Services

From a first endpoint to a platform of services.

  • Plug icon

    REST and GraphQL APIs

    Well-structured APIs for your web app, mobile app and partners.

  • Layers icon

    Backend for web and mobile

    One reliable service layer behind every screen, with authentication and roles.

  • Link icon

    Third-party integrations

    Payments, shipping, CRM, ERP and messaging tools connected cleanly, with retries and logging.

  • Branch icon

    Microservices and modular back ends

    Split a growing system into parts that can change and scale on their own, only where it pays off.

  • Repeat icon

    Webhooks and event streams

    Tell other systems the moment something happens, reliably and in order.

  • Spark icon

    AI-ready APIs

    Expose models and search to your products with limits, caching and cost tracking.

What we measure

An API is judged by its callers

We track these from launch day.

  • Latency

    Response time per endpoint, at the 95th percentile.

  • Availability

    Share of time the API answers correctly.

  • Breaking changes

    Number of releases that break an existing caller. The target is zero.

  • Developer onboarding

    Time for a new partner to make a first successful call.

How we work

From callers to a living API

Five steps that keep integrations calm.

  1. List the callers

    Find who will call the API, what they need and what must never be exposed.

    Discovery
  2. Write the contract

    Describe endpoints, data and errors in OpenAPI and review it with the callers.

    Design
  3. Build and test

    Implement against the contract with automated tests for success, failure and abuse.

    Build
  4. Publish and onboard

    Release docs, a sandbox and sample code, and help the first callers connect.

    Launch
  5. Run and evolve

    Monitor use, version changes and retire old versions with notice.

    Operate

Built to be trusted

What we verify before release

The details that decide whether partners stay.

  • Authentication and scopesEvery endpoint is protected, and permissions are tested.
  • Input validationBad or oversized requests are rejected cleanly with helpful errors.
  • Idempotent writesRetrying a payment or order request never creates a duplicate.
  • Consistent errorsPredictable status codes and messages across the whole API.
  • Contract testsChanges are checked against the published contract before release.
  • Audit logsYou can see who called what and when.

FAQs

API and backend questions, answered

An API is how one piece of software talks to another. API development means designing, building, securing and documenting those connections so web apps, mobile apps and partners can use your data and services reliably.

REST is simple, widely understood and works well for most cases. GraphQL helps when many different screens need different slices of the same data. We recommend based on your clients and team.

We use proven authentication such as OAuth 2.0, scoped permissions, input validation, rate limits and encrypted traffic, and we test for the common risks listed in the OWASP API Security guidance.

Yes. We can describe an existing API in OpenAPI, publish interactive documentation and add examples, which often cuts support questions from partners.

We version the API, write contract tests, announce deprecations early and keep old versions running for an agreed period.

Yes. We integrate payments, shipping, CRM, ERP, marketing and messaging tools, with retries, queues and logging so a failure in one place does not stop the rest.

Not always. A well-organised single service is simpler and cheaper for many products. We recommend splitting only when teams, scale or release speed clearly need it.

Yes. We expose search, summaries or predictions through an API with caching, usage limits and cost tracking, so teams can build on them safely.

A focused API often takes four to eight weeks for a first release. Larger platforms with many integrations are delivered in phases.

Yes. We monitor traffic and errors, handle security updates, support partners and plan new versions under a support plan.

Ready for an API people can build on?

Tell us who will call it and what they need. We will propose a contract, a security approach and a plan, with an honest estimate.

Free initial consultation • No obligation • NDA available
Chat with us

Choose who you'd like to talk to

Avik Mallick
Avik MallickCo-Founder & Partner
Sudipta Lahiri
Sudipta LahiriCo-Founder & Partner