Top Custom API Development DevelopersAPI Development
Hire the top custom API development developers to build secure, scalable APIs. We ship production-ready APIs in 8-12 weeks.
IRPR builds custom APIs for companies that need secure, high-performance integrations. We use Node.js, Python, Go, and cloud-native architectures with PostgreSQL, Redis, and AWS Lambda.
Every custom API ships within 8-12 weeks at a fixed price between $80K and $250K. We cover HIPAA, PCI-DSS, and SOC 2 compliance from day one.
Our buyers are CTOs requiring scalable backend integrations, founders building SaaS MVPs with third-party APIs, healthcare companies needing HIPAA-compliant data exchange, and fintech firms requiring PCI-DSS payment APIs.
Types of software we ship.
RESTful API
Standard REST APIs with JSON payloads, built on Node.js or Python. Integrates with OAuth, JWT, and AWS API Gateway.
GraphQL API
Efficient GraphQL endpoints using Apollo Server and Prisma. Reduces over-fetching for mobile and web clients.
WebSocket API
Real-time bidirectional APIs for live chat, notifications, and streaming data. Powered by Socket.io and Redis Pub/Sub.
Microservice API Gateway
Centralized gateway for multiple microservices with rate limiting, auth, and caching. Uses Kong or AWS API Gateway.
Third-Party Integration API
Custom connectors for Stripe, Salesforce, HubSpot, Slack, and more. Handles webhooks, OAuth, and retry logic.
Streaming Data API
High-throughput APIs for event streams using Kafka or AWS Kinesis. Ideal for IoT, analytics, and real-time dashboards.
Internal API for Legacy Systems
Wrapper APIs that modernize legacy databases and mainframes. Exposes REST endpoints using Python or Go and PostgreSQL.
Public Developer Platform API
Fully documented external APIs for third-party developers. Includes API keys, rate limiting, and developer portals with Swagger/OpenAPI.
We build for every business type.
Healthcare
Fintech
Ecommerce
SaaS
Logistics
Why Custom API Development Matters
A custom API connects your systems and data with speed, security, and control.
Off-the-shelf integrations rarely fit your exact workflows. Custom APIs give you exactly the endpoints, data formats, and authentication you need. We build them to handle millions of requests per day.
Every custom API we ship includes monitoring, error logging, and automated scaling. IRPR uses AWS CloudWatch, Sentry, and auto-scaling groups to maintain 99.9% uptime.
The Difference Between Ordinary API Developers and IRPR
Most agencies deliver an API that works today but breaks tomorrow. IRPR delivers APIs built for production from day one.
Generic shops often skip security hardening, load testing, and documentation. They use hourly billing that rewards slow work. Their junior developers learn on your project.
IRPR assigns only senior engineers with 10+ years experience. We deliver a fixed-price quote during the Roadmap phase (week 2). Every API includes CI/CD pipelines, automated tests, and OpenAPI documentation.
- Hourly billing with surprise overruns
- Junior developers building your API
- No load testing before production
- Minimal documentation
- No compliance as a default
- Handoff with no ongoing support
- Fixed price after 2-week Roadmap
- Senior engineers only (10+ yr avg)
- Load testing to 10x expected traffic
- Full OpenAPI 3.0 documentation
- HIPAA/PCI/SOC 2 built in
- 30-day post-launch support included
Our API Development Process
We follow a proven four-phase process to eliminate guesswork and deliver on time.
Phase 1: Roadmap – We spend 2 weeks defining endpoints, data models, and compliance requirements. You get a fixed price and delivery date.
Phase 2: Build – Our engineers code the API using Node.js, Python, or Go. We run automated tests and deploy to staging every 2 days.
What Ships With Every API
Every custom API comes with everything needed to run in production from day one.
You get the source code, infrastructure code, and documentation. No dependencies on IRPR after launch.
We include automated backups, scaling policies, and error tracking. Your team can take over immediately.
- Full source code in your private GitHub repo
- CI/CD pipeline using GitHub Actions or GitLab CI
- Automated unit and integration tests (Jest, PyTest)
- OpenAPI 3.0 / Swagger documentation
- Infrastructure as Code (Terraform or CloudFormation)
- Monitoring and alerting (CloudWatch, Sentry)
- Secrets management (AWS Secrets Manager or HashiCorp Vault)
- Rate limiting and API key authentication
- Load testing results for 10x expected traffic
- 30-day post-launch support and bug fixes
What we ship in this practice.
Payment Processing API for Fintech Startup
Built a PCI-DSS compliant payment API using Node.js, Express, and Stripe. Reduced transaction failure rates by 40% and cut Payout latency from 24 hours to real time.
Real-Time Inventory API for Ecommerce
Developed a WebSocket-based inventory API with Python, FastAPI, and Redis. Cut stock sync delays from 30 seconds to under 2 seconds across 5000+ products.
HIPAA-Compliant Patient Data API for Telehealth
Created a FHIR-based API in Go with Firebase Auth and HIPAA-compliant logging. Reduced patient data access latency by 60% for 200+ clinics.
CRM Integration API for SaaS Platform
Designed a GraphQL API using Apollo Server and Prisma to sync leads between Salesforce and a custom CRM. Automated data entry saved sales teams 10 hours per week.
Shipping Rate API for Logistics Company
Built a RESTful rate calculation API with AWS Lambda and DynamoDB. Fetches live quotes from 50+ carriers and returns rates in under 500ms.
Social Media Analytics API for Marketing Agency
Developed a streaming API using Python, Kafka, and Elasticsearch. Processes 1 million posts per day and surfaces sentiment trends in real time.
Why teams hire us.
Fixed Price, Not Hourly
Every API project gets a fixed price after the 2-week Roadmap phase. No hourly billing, no surprise invoices, no scope creep.
200+ APIs Delivered
We have built over 200 custom APIs for clients in 50 countries. Our portfolio includes healthcare, fintech, logistics, and ecommerce.
98% On-Time Delivery
Our structured process ensures 98% of projects deliver on schedule. Average API delivery takes 12 weeks from kickoff.
Full Code Ownership
You own 100% of the source code, documentation, and infrastructure. No lock-in, no licensing fees, no hidden charges.
Compliance From Day One
HIPAA, PCI-DSS, SOC 2, and GDPR are built into the architecture, not bolted on later. We have delivered compliant APIs for 20+ healthcare and 15+ fintech clients.
Senior Engineers Only
Every project is staffed with senior engineers averaging 10+ years of experience. No junior developers, no outsourcing, no shortcuts.
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.