API Development Company — REST APIs, GraphQL and Third-Party Integrations. Fixed Price.
We build custom REST APIs, GraphQL APIs, and third-party integrations powering Flutter mobile apps and enterprise systems — payment gateways, WhatsApp Business API, OpenAI and Gemini AI APIs, CRM integrations, and high-performance backend APIs. Node.js, Python, FastAPI. Fixed price. Direct engineer access. DPDP compliant.
API Development and Integration Services We Deliver
End-to-end API development and integration services — custom REST APIs, GraphQL APIs, third-party integrations, payment gateway APIs, WhatsApp Business API, OpenAI and Gemini AI API integration, and Flutter mobile app backend connectivity. Node.js, Python, FastAPI, and AWS API Gateway. Every API delivered at a fixed price with direct engineer access and full source code ownership.
Not sure which service fits your project?
Discuss Your ProjectEnd-to-end mobile app development company in India — native Android and iOS apps, cross-platform Flutter and React Native solutions, built for startups and enterprises across India, USA, UK, and Canada. Fixed price. Direct engineers. Full source code ownership.
Enterprise mobile app development company in India — scalable, secure, and integration-ready apps for large teams, complex workflows, and multi-platform deployment. Fixed price. Direct engineers.
One codebase, two platforms — Flutter and React Native cross-platform apps that run natively on iOS and Android. Reduce development cost by 30–40% without sacrificing performance, quality, or user experience.
AI-powered mobile app development company in India — intelligent Android and iOS apps built with machine learning, NLP, and computer vision. Smart features that learn from your users and drive measurable business outcomes.
Why Poor API Architecture Breaks Mobile Apps and Business Systems Real Solutions.
The three most common API development failures that cost businesses revenue, users, and compliance standing — and exactly how we solve each one.
Why Businesses Choose AZRIVA for API Development
From fixed-price delivery to production-grade AI API middleware — here is exactly what makes our API development different from every other backend team in India.
Our Development Process
A structured 6-step API development process from discovery and architecture through to deployment, documentation handover, and DPDP compliance sign-off.
API Discovery and Architecture Design
Data flows, integration requirements, mobile app connectivity needs, and third-party API dependencies mapped. REST or GraphQL architecture selected. Authentication strategy, rate limiting, versioning, and documentation standards agreed. Fixed-price scope produced before development begins.
Tech Stack and Infrastructure Selection
Right backend selected — Node.js with Express or Fastify for high-throughput APIs, Python with FastAPI for ML-integrated endpoints, AWS API Gateway for serverless. Database layer and caching strategy designed before any code is written.
API Development and Endpoint Build
RESTful or GraphQL endpoints built with consistent naming, proper HTTP methods, standardised error responses, comprehensive input validation, and full OpenAPI or GraphQL schema documentation generated automatically from sprint one.
Third-Party Integration Development
Payment gateways, WhatsApp Business API, OpenAI and Gemini AI APIs, CRM webhooks, shipping APIs, and all required third-party integrations built with retry logic, circuit breakers, webhook verification, and fallback handling as standard.
Security Testing and DPDP Compliance
JWT and OAuth 2.0 authentication, rate limiting, industry-standard API security best practices, input sanitisation, and penetration testing completed. DPDP Act compliance for all personal data processed through API endpoints verified before production deployment.
Deployment and Documentation Handover
Live deployment to AWS, Google Cloud, or your preferred infrastructure with API monitoring, error logging, usage analytics, and automated alerts. Full OpenAPI documentation, Postman collections, environment credentials, and source code handed over in full.
App Development Technologies We Work On
We use the right technology for each project — battle-tested stacks chosen for performance, scalability, and long-term maintainability.
Mobile App Development
We build high-performance native and cross-platform mobile apps for Android and iOS that deliver seamless user experiences across all devices and screen sizes.
Our Recent Work
From our portfolio of 100+ delivered projects — real APIs, mobile apps, and platforms built for clients across India, UK, USA, Canada and internationally. Every project delivered at a fixed price with full source code ownership.
What Clients Say About Our Mobile App Development in India
Real feedback from businesses we have built APIs, mobile apps, and platforms for — across India, USA, UK, Canada and internationally.
The Android app with DRM-protected content streaming was exactly what we needed. Widevine integration worked perfectly from day one. The team understood our requirements completely and delivered without compromise.
The Flutter app delivered for our field team works flawlessly even in low-connectivity areas. Offline sync was exactly what we needed. Post-launch support has been excellent.
Why Clients Trust AZRIVA as Their API Development Company in India
Businesses across USA, UK, Canada, Germany, Australia and India choose AZRIVA for API development because we combine mobile-first API architecture, production-grade third-party integrations, and industry-standard API security practices with transparent fixed pricing and direct engineer access. Unlike larger API development companies in India that route communication through account managers, every AZRIVA client works directly with the backend engineers building their APIs. Our custom API development process — from discovery and architecture design through endpoint development, security testing, DPDP compliance verification, and full documentation handover — is designed to deliver production-ready APIs on time, within budget, and built specifically for your Flutter mobile app or enterprise system integration requirements.
API Development & Integration Insights
Practical guides from AZRIVA's engineering team — written for CTOs and product teams planning API-first architectures and third-party integrations.
API Development and Integration — Common Questions
Honest answers from our API development team in India — covering REST APIs, GraphQL, third-party integrations, costs, timelines, DPDP compliance and more.