Best Custom API Development StudioAPI Development
Build fast, reliable APIs for your business. Ship in 12 weeks with fixed pricing and senior engineers.
IRPR builds custom APIs for web and mobile apps using Node.js, Python, Go, and AWS Lambda. We design REST and GraphQL endpoints that handle millions of requests per day.
Each API project ships in 12-14 weeks with a fixed price from $80K-$250K. We handle compliance for HIPAA, PCI-DSS, and SOC 2 out of the box.
We work with CTOs building SaaS platforms, product managers launching mobile apps with backend APIs, and founders scaling their MVP to production. They need APIs that scale without rewrites.
Types of software we ship.
REST API development
Stateless, cacheable APIs that work with any client. We use Express.js, FastAPI, or Go net/http.
GraphQL API development
Flexible queries for complex UIs. Built with Apollo Server and schema stitching.
Microservices API development
Decoupled services that communicate via gRPC or message queues. Deployed on Docker and Kubernetes.
Third-party API integration
Connect your app to Stripe, Salesforce, Twilio, and 100+ APIs with proper error handling and caching.
API gateway & management
Rate limiting, authentication, and logging at the edge using AWS API Gateway or Kong.
Real-time API (WebSocket)
Low-latency bidirectional communication for chat, live dashboards, and IoT. Built with Socket.IO or WebSocket.
Payment API development
Unified payment processing via Stripe, Braintree, and PayPal with PCI-DSS compliance built in.
Internal API for enterprise systems
Secure internal APIs that connect legacy systems with modern apps using JWT and service meshes.
We build for every business type.
SaaS platforms
Ecommerce
Fintech
Healthcare
IoT and Mobile
Why custom API development matters
APIs are the backbone of modern software. Your app lives and dies by its API performance.
We have built 200+ APIs for startups and enterprises. Each one is designed for reliability and speed from day one.
Most pre-built APIs cap at 10,000 requests per second. With our custom design, you can scale to 100,000+ without rewriting. Our team of senior engineers ensures 99.9% uptime.
Generic dev shops vs IRPR
Most agencies build APIs that break under load. Here's why we are different.
Generic firms start coding without a clear architecture. They use the same template for every client.
IRPR designs your API from the ground up with your data model, traffic patterns, and compliance needs. We ship with tests and documentation.
- Uses outdated tools like SOAP
- No load testing until launch
- OpenAPI docs are an afterthought
- Breaks when traffic spikes
- No security audit
- Slow response times (500ms+)
- REST or GraphQL from the start
- Load test at 10x expected traffic
- OpenAPI 3.0 docs auto-generated
- Auto-scaling with AWS/GCP
- OWASP top 10 + penetration test
- Sub-50ms response times
How we build your custom API
A proven 4-step process that de-risks your project.
We start with a 2-week Roadmap phase where we define endpoints, data models, and security requirements. No coding until you sign off.
Then we build your API in 8-10 weeks with weekly demos. You see progress every Friday.
What you get when we ship your API
Every custom API project includes these deliverables.
No black boxes. You own every line of code. We also provide monitoring and documentation.
Your team can take over after launch or we can do ongoing maintenance.
- Source code in your private GitHub/GitLab repo
- OpenAPI 3.0 specification (YAML/JSON)
- Postman collection with examples
- CI/CD pipeline on GitHub Actions or CircleCI
- Deployment scripts for AWS ECS/Lambda or GCP Cloud Run
- Load test results report (k6 or Locust)
- Security audit report (OWASP ZAP, Burp Suite)
- Logging and monitoring setup (Datadog, Sentry, CloudWatch)
- Admin dashboard or API playground (Swagger UI)
- 1 hour of post-launch support per week for 1 month
What we ship in this practice.
Real-time financial data API for a trading platform
Built a WebSocket-based API delivering stock prices in under 10ms. Processed 50M messages per day. Tech: Node.js, Redis, AWS ECS, Socket.IO.
RESTful API for a health records system
Designed a HIPAA-compliant API for a telemedicine app. Reduced patient data retrieval time by 60%. Tech: Python FastAPI, PostgreSQL, AWS Lambda.
GraphQL API for an ecommerce product catalog
Built a GraphQL API serving 200K products with faceted search. Cut page load time from 3s to 400ms. Tech: Apollo Server, MongoDB, Redis, CloudFront.
Payment gateway integration API for a subscription platform
Integrated Stripe and PayPal via a unified API. Handled 10K payments per day with zero downtime. Tech: Go, Stripe SDK, PostgreSQL, AWS Fargate.
Internal API for a logistics company's route optimization
Created a microservice API that computes optimal delivery routes. Saved 15% on fuel costs. Tech: Python, Google Maps API, PostgreSQL, Docker.
Real-time IoT sensor data ingestion API
Built an API that ingests 100K sensor readings per second from 10K devices. Tech: Node.js, Kafka, InfluxDB, AWS Kinesis.
Why teams hire us.
Fixed price, not hourly
Every API project gets a fixed quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges.
Senior engineers only
Our team averages 10+ years of experience. We do not hire juniors or outsource. Every line of code is written by a senior developer.
Built for scale from day one
We design each API to handle 100x your projected traffic. Using horizontal scaling with AWS or GCP, your API won't break when you hit 1M users.
Compliance ready
We have built APIs for HIPAA, PCI-DSS, SOC 2, and FERPA. We include compliance requirements in the Roadmap phase at no extra cost.
You own everything
After 12 weeks, you own all source code, infrastructure scripts, and documentation. No licenses, no royalties, no long-term contracts.
Proven delivery track record
We have shipped 200+ products across 50 countries, with a 98% on-time delivery rate. Each API project follows the same disciplined process.
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.