Best Custom API Development TeamAPI Development
We build production-grade APIs in 12 weeks. Fixed price, full ownership, no surprises.
IRPR is the best custom API development team for founders and CTOs who need a secure, scalable API built fast. We use Node.js, Go, Python, and Postgres to deliver REST, GraphQL, and gRPC endpoints that handle millions of requests per day.
Every project ships in 8 to 12 weeks with a fixed price between $80,000 and $250,000. We handle compliance for HIPAA, PCI-DSS, SOC 2, and FERPA out of the box. You get full source code, CI/CD pipelines, and 99.9% uptime SLAs.
Our buyers are B2B SaaS founders who need a multi-tenant API, healthcare CTOs building HIPAA-compliant FHIR endpoints, fintech product managers requiring PCI-DSS payment gateways, and ecommerce directors integrating custom inventory APIs.
Types of software we ship.
RESTful API Development
Stateless JSON endpoints for CRUD operations. Integrates with Stripe, Twilio, and AWS Lambda. Ideal for web and mobile backends.
GraphQL API Development
Single endpoint with declarative data fetching. Built with Apollo Server and Prisma. Reduces over-fetching by 40% on average.
gRPC API Development
High-performance binary protocol for microservices. Uses Protocol Buffers and HTTP/2. Handles 10x more requests than REST in benchmarks.
Third-Party API Integration
Connect your app to Salesforce, HubSpot, Shopify, or QuickBooks. Includes OAuth 2.0 flows, retry logic, and rate-limit handling.
Internal API Development
Private APIs for communication between internal microservices. Uses service mesh with Istio and gRPC for low-latency calls.
API Gateway & Management
Centralized gateway using Kong or AWS API Gateway. Adds authentication, rate limiting, caching, and logging in one layer.
Real-Time API (WebSocket)
Bidirectional streaming for chat, live dashboards, and collaborative tools. Built with Socket.IO or WebSocket on AWS Elastic Beanstalk.
Data API & ETL Pipelines
APIs that expose aggregated data from multiple sources. Uses Apache Kafka and Airflow for streaming and batch processing.
We build for every business type.
SaaS & B2B
Healthcare
Fintech
Ecommerce
Logistics & Travel
Why You Need the Best Custom API Development Team
A poorly designed API costs you time, money, and customers. Here is what IRPR delivers with every API project.
We have shipped over 200 products across 50 countries. Every API we build starts with a design-first approach using OpenAPI 3.0 or GraphQL SDL. We write automated tests for every endpoint using Jest and Supertest, achieving 95% code coverage on average.
Our team of senior engineers has built APIs that handle 10,000 requests per second for fintech clients and 99.99% uptime for healthcare platforms. You get a production-ready API in 12 weeks, not 12 months.
What Sets IRPR Apart from Other API Agencies
Most agencies bill hourly and deliver late. IRPR works differently.
We give you a fixed price after a 2-week Roadmap phase. That price does not change. You get full source code, CI/CD, and monitoring included. No surprise invoices, no scope creep.
Our engineers are senior only - no juniors, no offshore teams. You talk directly to the developers building your API. We use async communication but have daily overlap with US time zones.
- Hourly billing with no cap
- Junior developers on your project
- No API documentation included
- No CI/CD or monitoring setup
- Code ownership is unclear
- Delays are passed to you as extra cost
- Fixed price from week 2 onward
- Senior engineers only (10+ years)
- OpenAPI 3.0 docs auto-generated
- GitHub Actions CI/CD + Sentry monitoring
- Full source code ownership
- On-time delivery with 98% track record
Our Process for Building the Best Custom API
We follow a 4-phase process that de-risks your investment from day one.
Phase 1 is the Roadmap. In 2 weeks we define the API contract, data model, and security requirements. You get a fixed price and a detailed project plan.
Phase 2 is the Build. We develop the API in 2-week sprints with daily builds and weekly demos. You see working endpoints every Friday.
What Ships with Every API Project
You get more than just code. Every deliverable is production-ready.
We do not hand over a zip file. You get a fully operational system with monitoring, documentation, and deployment pipelines. Everything is in your own GitHub repository from day one.
Our checklist ensures nothing is forgotten. Every API ships with rate limiting, error handling, logging, and security scanning.
- Full source code in your GitHub repo
- CI/CD pipeline with GitHub Actions
- Sentry error tracking and alerts
- OpenAPI 3.0 / Swagger documentation
- Postman collection for all endpoints
- Load test results from k6
- Docker Compose for local development
- Rate limiting and request validation
- Authentication (JWT, OAuth 2.0, or API keys)
- Production deployment on AWS or GCP
What we ship in this practice.
Multi-Tenant SaaS API
Built a GraphQL API for a B2B SaaS startup that handles 500 tenants. Used Apollo Server, PostgreSQL, and Redis. Reduced tenant onboarding time from 2 weeks to 2 days.
HIPAA-Compliant FHIR API
Developed a FHIR R4 API for a telemedicine platform. Used HAPI FHIR, AWS HealthLake, and Okta for authentication. Passed HIPAA audit on first submission.
PCI-DSS Payment Gateway API
Created a custom payment gateway API for a fintech company. Used Stripe Connect, Go, and AWS KMS for tokenization. Processed $10M in transactions in the first month.
Real-Time Inventory API
Built a WebSocket API for a retail chain to sync inventory across 200 stores. Used Socket.IO, Node.js, and MongoDB. Reduced stock discrepancies by 80%.
MLS Data Aggregation API
Developed a REST API that aggregates data from 50+ MLS sources into one endpoint. Used Python, FastAPI, and PostgreSQL. Reduced data retrieval time from 30 seconds to 2 seconds.
Student Information System API
Built a FERPA-compliant API for an EdTech platform serving 100,000 students. Used GraphQL, Prisma, and Azure AD. Integrated with Canvas and Blackboard.
Why teams hire us.
Fixed Price, Not Hourly
Every project gets a fixed quote after the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges. You know the cost before we write a line of code.
Senior Engineers Only
Our team averages 12 years of experience. No juniors, no interns. Every engineer has shipped at least 5 production APIs and can explain the tradeoffs between REST and GraphQL.
Full Code Ownership
You own all source code from day one. We put everything in your GitHub repository. No IP disputes, no licensing fees, no vendor lock-in.
Production-Ready from Day One
Every API ships with CI/CD, monitoring (Sentry, Datadog), automated tests, and documentation. You get a system that works in production, not a prototype.
Compliance Built In
We build HIPAA, PCI-DSS, SOC 2, and FERPA compliance into the architecture from week 1. No bolt-on security. Our fintech APIs pass PCI audits on the first try.
12-Week Delivery Guarantee
We have a 98% on-time delivery record across 200+ projects. If we are late, we tell you by week 4 and adjust scope for free. No excuses.
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.