Senior API Development ServicesDevelopment Services
Hire senior engineers who design, build, and scale APIs for your product. Fixed pricing from $80K, delivery in 8-12 weeks.
IRPR builds production-grade APIs for SaaS platforms, mobile backends, and enterprise integrations. We use FastAPI, Node.js, GraphQL, PostgreSQL, Redis, and Kubernetes to deliver scalable endpoints.
Every project ships with a complete API gateway, automated documentation (OpenAPI/Swagger), rate limiting, authentication (OAuth 2.0, JWT), and CI/CD pipeline. Delivery runs 8-12 weeks with fixed pricing from $80,000 to $250,000. We build to HIPAA, PCI-DSS, or SOC 2 compliance as needed.
CTOs scaling their product need a senior team to build a multitenant API. Startup founders need a mobile backend shipped fast. Enterprise architects need to migrate from legacy SOAP to modern REST/GraphQL. Engineering managers need to extend their internal team with API specialists.
Types of software we ship.
REST API Development
Build resource-oriented endpoints with JSON payloads using FastAPI or Express. Includes pagination, filtering, and HATEOAS links.
GraphQL API Development
Single endpoint that lets clients query exactly what they need. Built with Apollo Server, Prisma, and Nexus schema definitions.
gRPC API Development
High-performance microservice communication using Protocol Buffers. Ideal for low-latency systems with Go or Node.js.
API Gateway Development
Centralized layer for authentication, rate limiting, routing, and logging. We use Kong, NGINX, or Envoy for production gateways.
WebSocket API Development
Real-time bi-directional data streams for chat, live dashboards, or IoT. Built with Socket.IO, ws library, or native WebSockets.
Third-Party API Integration
Connect your product to Stripe, Salesforce, Twilio, or 50+ other services. We write adapters with retry logic and circuit breakers.
Internal API Development
Design microservices for your team using RabbitMQ or Kafka for event-driven communication. Includes service discovery and health checks.
API Migration Services
Move from legacy SOAP or custom protocols to modern REST or GraphQL. We keep backward compatibility and run parallel systems.
We build for every business type.
Fintech
Healthcare
Ecommerce & Retail
SaaS & Platforms
Logistics & Supply Chain
Why senior API development matters
APIs are your product's backbone. Poorly built APIs cost you customers and engineers.
IRPR has shipped over 200 APIs for clients in 50+ countries. Our senior engineers average 8+ years of backend experience. We design APIs that handle 10,000+ requests per second with 99.9% uptime.
A senior team means you get proper error handling, consistent response formats, and thorough documentation from day one. Our clients see 40% fewer production incidents compared to their previous junior-led projects.
What you get with senior engineers vs. junior teams
Not all API developers are equal. The difference shows in code quality, performance, and maintenance.
Generic dev shops often assign junior developers with less than 2 years of experience. They skip API design standards, use inconsistent error responses, and forget rate limiting. Documentation is an afterthought.
IRPR assigns senior engineers who follow OpenAPI-first design. Every endpoint has consistent error codes, built-in auth, and auto-generated documentation. You get a production-ready API without rewrites.
- Junior engineers with <2 years experience
- No API design standards
- Inconsistent error responses
- Missing rate limiting and auth
- No documentation until delivery
- Hourly billing with scope creep
- Senior engineers with 5-10+ years each
- OpenAPI-first design
- Consistent error responses across all endpoints
- Built-in rate limiting and OAuth 2.0
- Auto-generated docs live during development
- Fixed price with clear scope during Roadmap
Our API development process
We follow a proven 4-stage process to deliver APIs you can ship.
Each stage includes clear deliverables and client sign-off. No ambiguity, no surprises.
The entire process takes 8 to 12 weeks for a typical API project, with milestones and demos every two weeks.
What ships with every API project
You own everything from day one.
Every API comes with the full source code, infrastructure as code, and operational tooling. Nothing is proprietary.
This means you can maintain, extend, or redeploy the API without IRPR involvement. There is no vendor lock-in.
- Source code in your private Git repo
- CI/CD pipeline on GitHub Actions or GitLab CI
- Auto-generated API docs (OpenAPI/Swagger UI)
- Rate limiting and authentication middleware (OAuth 2.0, JWT)
- Performance benchmarks and load test results
- Postman collection with example requests
- Monitoring and alerting (Sentry, Datadog, or PagerDuty)
- DevOps configuration (Docker, Kubernetes, Terraform)
- API specification document (Word/PDF)
- 30-day post-launch support and training
What we ship in this practice.
Payment Gateway API for fintech startup
Built a RESTful API for payment processing that handles 5,000+ transactions per second using FastAPI, Stripe, and PostgreSQL. Reduced latency from 200ms to 45ms and passed PCI-DSS certification.
Telemedicine API for healthcare provider
Developed a HIPAA-compliant WebSocket API for real-time video consultations using WebRTC and Node.js. Enabled a 20% increase in patient appointments while maintaining end-to-end encryption.
Ecommerce API for marketplace platform
Built a GraphQL API that unified product catalog, cart, and order management across 3 separate platforms using Apollo and Prisma. Cut integration time by 60% and reduced duplicate data entry.
IoT Data API for logistics company
Designed a gRPC API for real-time fleet tracking that processes over 1 million events per day using Go and TimescaleDB. Improved route optimization by 30% and saved $200K in fuel costs yearly.
SaaS Billing API for subscription platform
Created a REST API for subscription management integrated with Stripe webhooks using Node.js and MongoDB. Reduced billing errors by 90% and saved $50K per year in manual reconciliation.
Mobile Backend API for social app
Built a REST/GraphQL hybrid API for a social media app with 100K+ active users using Django, Celery, and Redis. Supported 95% uptime during a viral growth spike and scaled to 500K users.
Why teams hire us.
Senior engineers only
Every project is staffed with engineers averaging 8+ years of experience. No junior developers, no outsourcing middlemen. You talk directly with the engineers building your API.
Fixed price, not hourly
We quote a fixed price during the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges. The price you see is the price you pay.
Own your code and IP
You get full ownership of the source code, documentation, and infrastructure from day one. No lock-in, no licensing fees, no hidden terms.
Production-ready from start
Every API ships with monitoring, CI/CD, error tracking, and load balancing configured. You get a 99.9% uptime SLA backed by real infrastructure.
We speak backend
We use FastAPI, Node.js, GraphQL, PostgreSQL, Redis, Kafka, and Kubernetes. We don't learn on your dime. Senior engineers who know the tools deeply.
Global team, local hours
Our team spans 6 time zones, giving you 10+ hours of overlap with North American and European working hours. You get daily standups and async communication.
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.