Custom API Development VendorAPI Vendor
IRPR is a custom API development vendor for B2B SaaS companies. We ship production-ready APIs in 8-12 weeks with fixed pricing.
IRPR is a custom API development vendor that builds production-grade APIs for B2B SaaS, fintech, and healthcare companies. Our engineers specialize in REST, GraphQL, and WebSocket protocols using Node.js, Python, Go, and FastAPI.
We ship your first API version in 8-12 weeks. Pricing is fixed and starts at $80K (simple integrations) up to $250K (complex multi-service APIs). We comply with SOC 2, HIPAA, and PCI-DSS standards.
Hire us if you are a CTO at a Series B startup needing a scalable billing API, a VP of Engineering at an enterprise integrating with legacy systems, a Product Manager at a mid-market SaaS wanting a partner portal API, or a Head of Platform at a fintech requiring real-time transaction APIs.
Types of software we ship.
REST API Development
Build resource-oriented RESTful APIs with Node.js or Python. We use Express, FastAPI, and OpenAPI 3.0 for clear documentation.
GraphQL API Development
Create flexible GraphQL gateways with Apollo or Yoga. Reduce frontend data fetching overhead by 50% with a single endpoint.
Microservices APIs
Design event-driven microservices with Kafka or RabbitMQ. Each service has its own database and CI/CD pipeline.
Third-Party API Integration
Connect your platform to Salesforce, Stripe, HubSpot, or Slack. We handle rate limits, error handling, and data sync.
API Gateway Development
Implement API gateways with Kong or AWS API Gateway. Centralize authentication, throttling, and logging for all your services.
Real-Time API (WebSocket)
Push live data with WebSocket or SSE using Socket.IO or Phoenix Channels. Achieve sub-100ms latency for chat or live dashboards.
B2B API Portal
Create a developer portal with onboarding, api keys, and documentation. Use Stoplight or Redoc for automatic docs generation.
Backend-for-Frontend (BFF) API
Optimize APIs per client type (web, mobile, iot). Reduce payload size by 70% using GraphQL or custom REST endpoints.
We build for every business type.
SaaS platforms
Fintech
Healthcare
E-commerce
Logistics & Transportation
Custom API development vendor success metrics
IRPR delivers measurable results for every API project.
We have built more than 200 APIs for clients across 50 countries. Our average delivery time is 12 weeks from kickoff to production release.
98% of our API projects go live on time. Post-launch, we maintain 99.9% uptime with 24/7 monitoring and alerting via PagerDuty and Grafana.
Why choose a custom API development vendor like IRPR
Most dev shops treat APIs as an afterthought. IRPR builds them as products.
Generic agencies bill by the hour and deliver undocumented, fragile endpoints. Security audits often reveal OWASP Top 10 vulnerabilities like SQL injection or broken authentication.
IRPR treats every API as a product. We ship OpenAPI docs, integration tests, rate limiting, and monitoring dashboards automatically. Our code has passed SOC 2 and HIPAA audits without exceptions.
- Hourly billing with no price cap
- No written API contract or SLA
- Incomplete or missing documentation
- No security hardening (SQLi, XSS)
- No monitoring or alerting
- Code ownership not guaranteed
- Fixed price per project, no surprises
- 8-12 week timeline with weekly demos
- Auto-generated OpenAPI spec and Postman collection
- OWASP Top 10 + HIPAA/PCI compliance
- Grafana + Sentry monitoring included
- Full code ownership from day one
How we deliver as a custom API development vendor
Our process guarantees clarity, speed, and quality.
We start with a 2-week Roadmap phase to define endpoints, data models, and performance targets. You get a fixed price and timeline before any code is written.
During development we ship every two weeks. The final phase includes load testing, security review, and deployment with CI/CD pipelines on GitHub Actions.
What ships with every custom API project
You receive everything needed to run and scale your API independently.
Every project includes production code, infrastructure as code, and monitoring tooling. No black boxes, no hidden dependencies.
- Source code in your private GitHub/GitLab repo
- OpenAPI 3.0 or GraphQL schema documentation
- Postman collection with example requests
- Automated integration tests (80%+ coverage)
- CI/CD pipeline on GitHub Actions or CircleCI
- Dockerized development environment
- Kubernetes deployment files (staging + production)
- Grafana + Prometheus monitoring dashboards
- PagerDuty alerts for error thresholds
- Sentry error tracking with performance traces
What we ship in this practice.
Payment Processing API for Fintech
Built a PCI-DSS compliant payment API that handles 10,000 transactions per minute. Reduced transaction failure rate by 35% using idempotency keys and retry logic. Tech stack: Node.js, PostgreSQL, Stripe, Redis.
Patient Data API for Healthcare
Developed a HIPAA-compliant FHIR API for a telemedicine platform. Integrated with 12 EHR systems reducing data entry time by 8 hours per provider per week. Tech stack: Python, FastAPI, PostgreSQL, AWS HealthLake.
Inventory API for E-commerce
Created a real-time inventory API serving 500+ warehouses. Cut stock discrepancy reports from 4 hours to under 10 seconds using WebSocket push updates. Tech stack: Go, Redis, Kafka, PostgreSQL.
Partner API for B2B SaaS
Designed a B2B partner API with rate limiting, API keys, and usage analytics. Onboarded 50+ partners in 3 months, generating $1.2M in new revenue. Tech stack: Ruby on Rails, GraphQL, Apollo, MongoDB.
Tracking API for Logistics
Built a multi-carrier shipment tracking API that aggregates data from FedEx, UPS, and DHL. Reduced customer support tickets by 60% by providing real-time ETAs to end users. Tech stack: Python, FastAPI, PostgreSQL, Celery.
Content Delivery API for Media
Created a GraphQL API for a media streaming platform serving 5 million monthly users. Reduced video start time by 40% through CDN-aware image and video endpoints. Tech stack: Node.js, GraphQL, AWS CloudFront, S3.
Why teams hire us.
Fixed price from day one
We give you a fixed quote after the 2-week Roadmap phase. No hourly billing, no surprise overruns. Across 200+ projects, we have never changed a price mid-build.
Senior engineers only
Every project is staffed with engineers who have 10+ years of experience. We do not outsource to junior devs or use offshored teams.
Security compliance built-in
All APIs follow OWASP Top 10 guidelines. We have passed SOC 2 Type II, HIPAA, and PCI-DSS audits. Security scanning with Snyk and Checkmarx runs on every build.
Full code ownership
You own every line of code we write. There are no lock-in, no IP disputes, no ongoing license fees. The source code is in your repo from sprint one.
Production ready in 8-12 weeks
Our average build time is 10 weeks for a full production API. We handle deployment, monitoring, and documentation so you can focus on your product.
True partnership, not a vendor handoff
We assign a dedicated project manager and a senior tech lead. We use weekly demos and shared Slack channels so you are never in the dark.
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.