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APIs, Backends & Integrations

API Development & Integration Company in India

Disconnected systems create double entry, errors and delays. As an API development and system integration company, we build clean, documented APIs and integrations that let your ERP, CRM, e-commerce, accounting, mobile apps and partners exchange data automatically and reliably.

  • NDA before discovery
  • 100% source code & IP ownership
  • Security-tested before go-live

What this covers

  • Custom API Development
  • Software Integration
  • Mobile App Backend/API

Typical timeline

Scoped in the discovery call; most engagements start within two weeks.

Who it is for

Who our Custom API Development service is for

Every API we build has versioning, authentication, rate limiting, validation, logging and an OpenAPI specification. Integrations include retries, idempotency and reconciliation, because in business systems a silently dropped record is worse than a visible error.

Discuss your requirement
  • 01

    Companies re-entering the same data in several systems

  • 02

    Mobile app teams needing a secure, scalable backend

  • 03

    Businesses offering APIs to partners, dealers or customers

  • 04

    Enterprises connecting SaaS tools to legacy systems

Capabilities

What is included in Custom API Development

REST & GraphQL API development

Well-designed, versioned APIs with OpenAPI documentation and consistent conventions.

Mobile app backends

Authentication, push notifications, file storage and real-time features for Android and iOS apps.

System integration

ERP, CRM, HRMS, e-commerce, Tally, Zoho, SAP and marketplace integrations with two-way sync.

Partner & public APIs

Developer portals, API keys, usage plans and sandbox environments for your partners.

Event-driven integration

Webhooks, queues and event streams for near real-time data flow between systems.

API security & monitoring

OAuth 2.0, rate limiting, input validation, audit logs and uptime monitoring.

Also covers Custom API DevelopmentSoftware IntegrationMobile App Backend/API

How we work

A clear, step-by-step delivery process

You always know what happens next, who is responsible and what you will receive at each stage.

Typical timeline

Scoped in the discovery call; most engagements start within two weeks.

  1. 01

    Discovery

    Goals, users, workflows, integrations and success metrics are mapped in a workshop.

  2. 02

    Solution design

    Architecture, data model, security design and a milestone plan are signed off.

  3. 03

    Build sprints

    Two-week sprints with a working preview you can test at every step.

  4. 04

    Testing & launch

    Functional QA, performance checks, VAPT and user acceptance before go-live.

  5. 05

    Support & growth

    SLA-backed support, monitoring and a roadmap for the next phase.

Deliverables

What you receive

  • Production APIs or integrations
  • OpenAPI documentation and Postman collections
  • Authentication and rate-limiting setup
  • Monitoring and alerting
  • Integration reconciliation reports
  • Handover and developer guide

Technology & standards

Tools we work with

Node.jsLaravelPython (FastAPI)GoGraphQLOpenAPI / SwaggerPostgreSQLRedisRabbitMQKong / AWS API Gateway

We recommend tools based on your scale, budget and existing systems, not on what is fashionable. Every choice is explained in the proposal.

Engagement models

Choose how we work together

Fixed-scope project

A discovery workshop produces a written scope, architecture and milestone plan with a fixed price before any build commitment.

Most chosen

Dedicated product team

A cross-functional squad (PM, engineers, QA, DevOps) working in two-week sprints on your roadmap, billed monthly.

Support & evolution retainer

SLA-backed maintenance, security patching and a monthly allocation of enhancement hours after go-live.

How pricing works: Every project is priced after a free discovery call: you receive a written scope with milestones and a fixed quote, so there are no surprises mid-way.

Get a quote

FAQs

Custom API Development: frequently asked questions

Can you connect our website or app with Tally?

Yes. We sync masters, invoices, receipts and stock between Tally and your systems, with duplicate checks and error logs so your accounts stay accurate.

Do you build backends for mobile apps built by others?

Yes. We can build or take over the backend and APIs for an existing app, document them and make them secure and scalable.

How do you secure APIs?

With OAuth 2.0 or signed tokens, per-client keys, rate limiting, strict input validation, encryption in transit and audit logs. APIs are security-tested before they go live.

What if a third-party system changes its API?

We isolate each integration behind an adapter, monitor for failures and version our own APIs, so changes are contained. Maintenance plans cover updates when providers change their APIs.

Keep exploring

Related services

All Software Engineering services

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Share a few details. A senior specialist reviews them and schedules a call to discuss scope, timeline and cost, with no obligation.

  • Written scope and fixed quote
  • NDA signed before you share sensitive details
  • Direct access to the people doing the work

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