Expert Custom API Development ConsultantsAPI Development
Build APIs that scale. We design and code REST, GraphQL, and gRPC APIs in 8-12 weeks with fixed pricing.
IRPR builds custom APIs for startups and enterprises. Our expert custom API development consultants design and code REST, GraphQL, and gRPC endpoints using Node.js, Python, Go, and C#. We handle authentication, rate limiting, and database integration from day one.
Every project ships a production-ready API within 8 to 12 weeks. Pricing is fixed between $80,000 and $250,000 depending on endpoints and complexity. We follow HIPAA, PCI-DSS, and SOC 2 compliance where needed.
Founders hire us when their current APIs can't handle scale. CTOs bring us in to replace tangled legacy integrations. Product managers choose us when they need a secure public API for their SaaS. Compliance officers trust us with regulated data workflows.
Types of software we ship.
REST API Development
Design resource-oriented endpoints with OpenAPI specs. Integrate with Stripe, Salesforce, and AWS Lambda.
GraphQL API Design
Build strongly typed schemas with Apollo Server. Clients query exactly the data they need, nothing more.
gRPC Microservices API
Implement high-performance RPC with Protocol Buffers. Use for internal service-to-service communication at scale.
Third Party API Integration
Connect your platform to Slack, HubSpot, Shopify, or QuickBooks. Two-way sync with error handling and retries.
Public API Portal
Ship developer portals with authentication keys, rate limits, and usage analytics. Monetize endpoints via Stripe billing.
API Proxy & Gateway
Route, throttle, and log API traffic using Kong or AWS API Gateway. Add caching and IP whitelisting.
Event-Driven Webhooks API
Send real-time payloads via HTTP callbacks. Track delivery with queues and dead-letter mechanisms.
Legacy API Modernization
Extract monolithic endpoints into microservices. Keep existing clients working while you rewrite in Node.js or Go.
We build for every business type.
SaaS Platforms
Fintech & Payments
Healthcare
Ecommerce & Retail
Logistics & Supply Chain
API Development by the Numbers
Here is what our expert custom API development consultants have delivered for clients worldwide.
We have shipped APIs for 200+ products across 50 countries. Every API meets SLA targets of 99.9% uptime at launch. Our average project timeline is 12 weeks from contract to production release.
Clients see measurable improvements: 40% lower latency after migrating from REST to GraphQL, 60% reduction in development time using our pre-built auth and logging modules, and zero compliance findings on HIPAA or SOC 2 audits.
Why Generic Dev Shops Fail at API Projects
Most agencies treat APIs as an afterthought. Our expert custom API development consultants treat them as a product.
Generic dev shops often skip API contracts, versioning, and rate limiting. They deliver undocumented endpoints that break when you add new fields. Their code has no monitoring, no retry logic, and no security hardening.
IRPR writes OpenAPI specs before writing code. We enforce schema validation, add idempotency keys, and include structured logging with Elasticsearch. Every API ships with a Postman collection and automated integration tests.
- No API contract upfront
- No versioning strategy
- No rate limiting or auth
- No monitoring or alerts
- No documentation or tests
- No compliance review
- OpenAPI spec before code
- Semantic versioning built in
- JWT + OAuth2 + API keys
- Prometheus + Grafana dashboards
- Postman collection + integration tests
- HIPAA/PCI/SOC2 compliance built in
How We Build Your API in 12 Weeks
Our expert custom API development consultants follow a repeatable four-phase process.
We start with an Idea phase where we map out endpoints, data models, and third-party integrations. In the Roadmap phase you get a fixed price and timeline. The Product phase is where we code the API, adding auth, caching, and error handling. The Release phase includes load testing, documentation, and deployment.
Each phase takes about three weeks. You review progress every two weeks. At the end you own the source code, the CI/CD pipeline, and the monitoring stack.
What Ships When You Hire an Expert Custom API Development Consultant
Every engagement includes these essential deliverables, not just code.
You get everything needed to run, monitor, and extend your API without relying on us. The code is yours from day one. We set up your CI/CD, error tracking, and logging infrastructure so your team can maintain the API independently.
- Source code in your GitHub/GitLab repo
- OpenAPI 3.0 specification document
- Postman collection with example requests
- CI/CD pipeline (GitHub Actions or GitLab CI)
- Sentry error tracking + performance monitoring
- Prometheus metrics + Grafana dashboard
- Rate limiting and API key management
- Automated unit and integration tests
- Deployment scripts for AWS/GCP/Azure
- One hour of post-launch training for your team
What we ship in this practice.
SaaS Public API
Reduced partner onboarding from 4 weeks to 2 days. Built with Node.js, PostgreSQL, and Redis. Stripe billing integration for API monetization.
Healthcare Data Exchange API
Migrated 3 legacy SOAP services to a single FHIR REST API. Cut data retrieval time by 80%. Achieved HIPAA compliance on first audit.
Fintech Payment Gateway API
Unified three payment processors under one GraphQL endpoint. Reduced transaction failures by 15%. PCI-DSS Level 1 certified at launch.
Ecommerce Inventory Sync API
Synced inventory across Shopify, Amazon, and 3PL warehouse in real time. Eliminated overselling. Built with Python, FastAPI, and Celery.
Logistics Tracking API
Provided accurate ETAs for 10,000+ shipments daily. Used gRPC between microservices. Achieved 99.95% uptime over 12 months.
EdTech LTI Integration API
Enabled single sign-on and grade passback for 50+ school districts. FERPA compliant. React frontend with a Django REST backend.
Why teams hire us.
Fixed price, not hourly
Every API project gets a fixed quote during the Roadmap phase (week 3). No hourly billing, no surprise invoices, no scope creep charges.
Senior engineers only
Every expert custom API development consultant at IRPR has 8+ years of production experience. No junior developers. You talk directly to the people coding your API.
Compliance built in
We handle HIPAA, PCI-DSS, SOC 2, and FERPA from day one. Our checklist includes audit logging, encryption at rest, and access controls.
Full ownership
You own the source code, the design docs, and the deployment scripts. No lock-in. No license fees. Your team can take over anytime.
Start in 2 weeks
We can kick off your project within 14 days of signing. Our team has capacity for 3 to 4 new API engagements per month.
Post-launch support
Every project includes 30 days of warranty support. After that we offer monthly retainer packages for optimization and new endpoints.
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.
─── share this page ───
