Best Backend API Development AgencyAPI Development
We build production-grade APIs that handle millions of requests. Our senior engineers ship your backend in 8-12 weeks with fixed pricing.
IRPR is the best backend api development agency for companies that need production-grade APIs built fast. We use Node.js, Python, Go, and Rust to build REST and GraphQL APIs that scale to 10,000+ requests per second with sub-50ms latency.
We ship your backend in 8-12 weeks with a fixed price of $80K-$250K. Every API includes auto-scaling on AWS/GCP, CI/CD pipelines, Sentry error tracking, and comprehensive Swagger documentation. We handle HIPAA, PCI-DSS, and SOC 2 compliance for regulated industries.
Founders building SaaS MVPs hire us to launch their API-first product in 10 weeks. CTOs at fintech companies hire us to rebuild monolithic backends into microservices. Product managers at healthcare startups hire us to build HIPAA-compliant FHIR APIs.
Types of software we ship.
REST API Development
Build stateless RESTful APIs with Express.js or FastAPI. Includes versioning, rate limiting, and OAuth2 authentication.
GraphQL API Development
Design GraphQL schemas with Apollo Server or Hasura. Supports real-time subscriptions and batched queries for mobile apps.
Microservices API Architecture
Decompose monoliths into event-driven microservices using Kafka, RabbitMQ, and Docker. Each service scales independently.
API Integration Layer
Build a unified integration layer that connects Stripe, Salesforce, HubSpot, and 20+ third-party APIs through a single gateway.
Webhook System
Implement reliable webhook delivery with retry logic, idempotency keys, and event logging. Handles 100,000+ events per hour.
Real-Time API (WebSocket)
Build real-time APIs with WebSocket or Server-Sent Events using Socket.io or AWS AppSync. Sub-100ms message delivery.
API Gateway & Rate Limiting
Deploy API gateways with Kong or AWS API Gateway. Includes rate limiting, IP whitelisting, and request transformation.
Internal API for Mobile Backend
Design mobile-optimized APIs with pagination, caching, and offline sync support. Uses Firebase Cloud Messaging for push notifications.
We build for every business type.
SaaS platforms
fintech companies
healthcare organizations
ecommerce businesses
real estate platforms
Why IRPR Is the Best Backend API Development Agency
We ship production-grade APIs that handle millions of requests with 99.9% uptime.
Our senior engineers have built APIs for 200+ products across 50 countries. We use Node.js, Python, Go, and Rust to deliver sub-50ms response times at scale. Every API includes auto-scaling, rate limiting, and comprehensive monitoring.
We ship your backend in 8-12 weeks with a fixed price of $80K-$250K. No hourly billing, no scope creep. You get source code, CI/CD pipelines, Swagger docs, and a 30-day warranty.
Generic Dev Shop vs IRPR
Most agencies build APIs that break under load. IRPR builds APIs that scale.
Generic dev shops use junior developers, copy-paste boilerplate, and ship APIs that crash at 100 concurrent users. They bill by the hour and change scope mid-project.
IRPR assigns senior engineers only. We design for scale from day one, include load testing in the Roadmap phase, and deliver on a fixed price. Every API ships with auto-scaling, monitoring, and a 30-day warranty.
- Junior developers with 2 years experience
- Hourly billing with no cap
- No load testing before launch
- APIs that crash at 100 concurrent users
- No monitoring or alerting
- No documentation or Swagger specs
- Senior engineers with 10+ years experience
- Fixed price from $80K
- Load testing in Roadmap phase (week 2)
- APIs that handle 10,000+ requests per second
- Sentry error tracking and Datadog monitoring
- Comprehensive Swagger docs and Postman collections
Our Backend API Development Process
We follow a 4-phase process that ships your API in 8-12 weeks.
Phase 1: Idea. We map your requirements, define API endpoints, and choose the right stack (Node.js, Python, Go, or Rust). Phase 2: Roadmap. We deliver a fixed quote, architecture diagram, and load testing plan.
Phase 3: Product. Our engineers build the API in 2-week sprints with daily standups and weekly demos. Phase 4: Release. We deploy to production, set up monitoring, and hand over source code and documentation.
What Ships With Every Backend API
Every API project includes these deliverables by default.
We ship production-ready code with full documentation, monitoring, and a 30-day warranty. No hidden costs, no missing pieces.
- Source code in your GitHub/GitLab repo
- CI/CD pipeline on GitHub Actions or GitLab CI
- Auto-scaling infrastructure on AWS ECS or GCP Cloud Run
- Sentry error tracking and Datadog monitoring
- Swagger/OpenAPI documentation with interactive playground
- Postman collection with example requests
- Load test report with k6 or Artillery results
- 30-day warranty with SLA for bug fixes
- Architecture diagram in Draw.io or LucidChart
- Deployment runbook and incident response guide
What we ship in this practice.
SaaS Multi-Tenant API
Built a multi-tenant API for a B2B SaaS platform that handles 500,000 requests per day. Used Node.js, PostgreSQL, and Redis. Reduced latency from 200ms to 40ms.
Fintech Payment Gateway API
Built a PCI-DSS compliant payment gateway API that processes 10,000 transactions per hour. Used Go, Stripe Connect, and AWS KMS. Achieved 99.99% uptime in 12 weeks.
Healthcare FHIR API
Built a HIPAA-compliant FHIR API for a telemedicine platform. Used Python, FastAPI, and AWS HealthLake. Reduced patient data retrieval time from 5 seconds to 200ms.
Ecommerce Product Search API
Built a full-text search API for an ecommerce catalog with 2 million products. Used Node.js, Elasticsearch, and Redis. Reduced search latency from 1.5 seconds to 80ms.
Real Estate MLS Integration API
Built an API that syncs MLS property listings from 50+ sources in real time. Used Python, Kafka, and PostgreSQL. Reduced listing update time from 24 hours to 2 minutes.
EdTech Gradebook API
Built a FERPA-compliant API for a K-12 gradebook platform serving 100,000 students. Used Rails, PostgreSQL, and Redis. Reduced grade calculation time from 10 minutes to 5 seconds.
Why teams hire us.
Senior engineers only
Every engineer on your project has 10+ years of experience. No juniors, no offshore teams. We assign a dedicated lead engineer who stays through the entire project.
Fixed price, not hourly
You get a fixed quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices. Our average project costs $80K-$250K for a production-grade API.
8-12 week delivery
We ship your first API version in 8-12 weeks. Our track record shows 98% on-time delivery across 200+ projects. We use 2-week sprints with weekly demos.
Compliance built in
We build HIPAA, PCI-DSS, and SOC 2 compliant APIs by default. Our engineers have shipped APIs for healthcare, fintech, and government clients in 50+ countries.
Full ownership
You own all source code, documentation, and infrastructure from day one. We never use proprietary frameworks or lock you into our tools.
30-day warranty
Every API ships with a 30-day warranty covering bug fixes and performance issues. We respond to critical bugs within 4 hours during business days.
Idea → Roadmap → Product → Release.
Every engagement runs through the same four-stage pipeline. Predictable by design.
Questions clients ask first.
Related services and industries.
Ready to build? Let's talk.
30-minute discovery call. No deck. We'll tell you honestly what it takes, how long, and how much.