Professional Custom API Development VendorAPI Development
We build production-ready APIs for your product. 200+ shipped in 12 weeks with fixed pricing.
IRPR is a professional custom API development vendor. We build REST and GraphQL APIs using Node.js, Python, Go, and serverless on AWS Lambda.
We ship production APIs in 8-12 weeks with fixed pricing from $80K-$250K. All APIs pass PCI-DSS or HIPAA compliance checks.
CTOs scaling a SaaS product hire us for API-first architecture. Startup founders need a custom backend to launch MVP. Enterprise architects need secure API gateways for microservices.
Types of software we ship.
REST API Development
Build standard RESTful APIs with OpenAPI 3.0 docs. Supports JSON, XML, OAuth2, and rate limiting. Integrates with Stripe, Salesforce, HubSpot.
GraphQL API Development
GraphQL APIs with Apollo Server and Prisma. Auto-generate schema from PostgreSQL or MySQL. Ideal for front-end teams needing flexible queries.
Microservices API Architecture
Design and implement decoupled microservices with gRPC and message queues (Redis, RabbitMQ). Deploy to Kubernetes clusters.
API Integration Middleware
Custom middleware to connect legacy systems with modern APIs. Use MuleSoft, Apache Camel, or custom Node.js adapters.
API Gateway Setup
Configure API gateways via AWS API Gateway, Kong, or NGINX. Add auth, throttling, caching, and logging per route.
Webhook and Event-Driven API
Realtime webhooks and event-driven endpoints using AWS EventBridge, Kafka, or Pub/Sub. Reliable delivery with retry and dedup.
Real-time API (WebSockets)
WebSocket APIs for chat, live dashboards, gaming. Use Socket.io, AWS WebSocket API, or custom WS with heartbeat and reconnection.
Internal API for B2B
Secure internal APIs for partners and B2B customers. API keys, audit logs, usage plans. Document with Swagger UI.
We build for every business type.
SaaS platforms
Fintech
Healthcare
Enterprise Integrations
E-commerce & Retail
Why choose a professional custom API development vendor?
We have the track record and process to deliver APIs you can trust.
Our APIs power 200+ products across 50+ countries. We maintain 99.9% uptime and ship in 8-12 weeks with fixed pricing.
Every API we build includes automated CI/CD via GitHub Actions, Sentry error monitoring, and Postman collections for testing.
How IRPR differs from generic API shops
Most agencies treat API development as an afterthought. We treat it as the product.
Generic dev shops deliver undocumented, unscalable APIs that break after first load test. They charge hourly with no timeline guarantee.
IRPR delivers production-ready APIs with OpenAPI docs, load-tested scaling, and fixed price. You own the code and the repo from day one.
- No API documentation
- Hourly billing with no cap
- No CI/CD pipeline
- Single developer bottleneck
- Vendor lock-in (no code ownership)
- No post-launch monitoring
- OpenAPI 3.0 docs shipped with code
- Fixed price from Roadmap phase
- GitHub Actions CI/CD by default
- Dedicated senior engineer team
- Full source code ownership
- Sentry + Datadog monitoring included
Our API development process
From idea to release in 8-12 weeks with a clear fixed price.
We follow a four-phase framework: Idea, Roadmap, Product, Release. Each phase has specific deliverables and go/no-go gates.
Our senior engineers work async-first with overlapping US time zones. You get daily updates and a weekly demo.
What ships with your custom API
Every API project includes these deliverables.
Our standard delivery includes everything needed for your team to maintain and scale the API after launch.
We also provide a 30-day post-launch support window for bug fixes and minor adjustments.
- Source code in your GitHub/GitLab repo
- OpenAPI 3.0 specification (YAML/JSON)
- CI/CD pipeline on GitHub Actions or GitLab CI
- Sentry error tracking and Datadog metrics
- Postman collection with example requests
- Deployment scripts for AWS/GCP/Azure
- Architecture diagram and README docs
- Load test results (artillery or k6) showing 10K+ req/sec
- Security scan report (OWASP Top 10)
- 30-day post-launch support
What we ship in this practice.
Real-time payment processing API for fintech startup
Built a PCI-DSS compliant REST API handling 50K transactions/day with Stripe integration. Reduced payment failure rate by 15% and cut average response time to 40ms. Stack: Node.js, Express, PostgreSQL, Stripe, Redis.
GraphQL API for e-commerce product catalog
Designed a GraphQL API for an online retailer with 200K products. Reduced front-end load time by 60% with batched queries and Apollo caching. Stack: Apollo Server, Prisma, PostgreSQL, Redis, AWS Lambda.
Microservices API for telehealth platform
Built 12 microservices for a HIPAA-compliant telehealth app. Enabled video scheduling, patient records, and billing via separate APIs. Achieved 99.99% uptime and supported 500 concurrent users. Stack: Go, gRPC, PostgreSQL, RabbitMQ, Docker, Kubernetes.
API gateway for SaaS multi-tenant platform
Configured AWS API Gateway with custom authorizer and rate limiting for a SaaS with 500 tenants. Eliminated 80% of integration issues with partner APIs. Stack: AWS API Gateway, Lambda, DynamoDB, Cognito.
Webhook API for CRM integration
Developed event-driven webhook API to sync contacts and deals between HubSpot and custom CRM. Reduced manual data entry by 8 hours/week. Stack: Node.js, AWS EventBridge, PostgreSQL, HubSpot API.
Internal B2B API for logistics company
Built a REST API for third-party carriers to submit shipment data. Handled 1M+ requests daily with 99.9% uptime. Replaced legacy FTP with real-time HTTP endpoints. Stack: Python, FastAPI, PostgreSQL, NGINX, Docker.
Why teams hire us.
Fixed price, not hourly
Every project gets a fixed quote in the Roadmap phase (week 2). No surprise invoices or scope creep charges.
Senior engineers only, no juniors
Our team averages 12+ years of experience. Every API is built by senior-level developers, not outsourced to junior contractors.
Full code ownership from day one
You own the source code, specification, and all deliverables. No vendor lock-in. We deploy to your cloud account.
Built for compliance from the start
APIs for fintech pass PCI-DSS Level 1, healthcare HIPAA audits, and SaaS SOC 2 Type II. We bake in audit logs and encryption.
Load-tested to 10K+ requests/second
Every API undergoes artillery load tests before release. We guarantee performance under your expected traffic.
30-day post-launch support included
After release, we provide 30 days of bug fixes and minor adjustments. You get direct access to the engineering team via Slack.
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.