API development and integration
The interfaces that let your systems talk to each other, and let partners build on top of what you have.
Kolkata and West Bengal
You own the source code
Support after launch
An API is a contract. Once another system depends on it, changing it carelessly breaks something you cannot see. That is why versioning, validation and documentation are not extras on an API project — they are most of what separates an API that lasts from one that becomes a liability.
We build new APIs, document existing ones properly, and handle the integration work of connecting to payment gateways, logistics providers, accounting packages and government portals.
Problems this solves
Undocumented endpoints
APIs that only the original developer understands become impossible to extend and dangerous to change.
Breaking changes with no warning
Modifying a response shape without versioning silently breaks every consumer that depended on it.
No rate limiting
A single misbehaving client, or a scraper, can exhaust capacity meant for everyone else.
Integrations that fail silently
Without retries, dead-letter handling and alerting, a failed webhook is simply lost data nobody notices until reconciliation.
What the work covers
API design
Resource modelling, consistent conventions and a versioning strategy.
REST and GraphQL
Whichever suits the consumers, rather than whichever is fashionable.
Authentication
API keys, OAuth 2.0 and JWT, with scopes that limit what a token can do.
Third-party integration
Payments, shipping, accounting, SMS, and government portals.
Reliability
Idempotency, retries with backoff, dead-letter queues and replay.
Documentation
OpenAPI specifications and worked examples a new developer can follow.
What happens to a single API call
Every request passes through the same sequence. Authentication and validation sit ahead of business logic so invalid or unauthorised calls are rejected before they can touch data.
Client
Application, mobile app or partner system.
API gateway
Routing, rate limiting and request logging.
Authentication
Token verification and scope checks.
Business logic
Validation, rules and orchestration.
Database
Reads and transactional writes.
Response
Consistent shape, status codes and errors.
What you end up with
A documented contract other teams can build against
Versioning so changes do not break consumers
Rate limiting and abuse protection
Integrations that retry rather than lose data
Consistent, debuggable error responses
Logging detailed enough to trace a single request
Technologies we commonly use for this
The stack is chosen per project — from your requirements, your existing systems and who will maintain it afterwards. This list is what we reach for most often, not a fixed answer.
Ways to work together
Model A
Fixed scope, fixed price
The scope is written down in detail before work starts, and the price is fixed against it. Changes are quoted separately as they come up.
Best for: Well-understood projects — a website, a defined module, a rebuild.
Model B
Monthly retained team
An agreed number of developer days each month, directed by your priorities. Scope can move without renegotiating a contract.
Best for: Products that will keep evolving after the first release.
Model C
Phased delivery
The system is split into phases that each ship something usable. Every phase is quoted before it begins.
Best for: Large ERP, SaaS and platform builds where the full scope is big.
Model D
Support and maintenance
Ongoing care for a system that already exists — ours or someone else’s — covering fixes, updates and small enhancements.
Best for: Live systems that need a reliable pair of hands.
Sectors we apply this in
Frequently asked questions
REST is simpler to cache, easier to debug and well understood by every consumer. GraphQL earns its complexity when clients need very different shapes of the same data, particularly mobile apps trying to minimise round trips. Many systems sensibly use both.
Usually. It takes longer, because behaviour has to be established empirically against a sandbox, but it is common work and rarely a blocker.
Transport encryption, token-based authentication with limited scopes, strict input validation, rate limiting per client, and logging of authentication failures so abuse is visible.
Yes — an OpenAPI specification plus worked examples. An API without documentation is only half delivered.
Topics people search for
Related services
Web Application Development
Applications that run in the browser, handle real workloads and hold up when several departments depend on them at once.
Cloud Solutions
Hosting designed around what your application actually needs, with the monitoring and backups that make it safe to rely on.
SaaS Development
Building a software product means building a business system around it too — tenancy, billing, onboarding and support tooling.
Custom Software Development
Software shaped around the way your business already works, instead of a packaged product you have to reorganise around.
Talk through your project with a developer
You will speak to someone who writes the software, not a salesperson working from a script. Bring your requirements, or just the problem.