Best Node.js API Development AgencyAPI Development
We build REST and GraphQL APIs that handle millions of requests per day. Fixed price, 8-12 week delivery, senior engineers only.
IRPR builds high-performance Node.js APIs for startups and enterprises. We use Express.js, Fastify, or NestJS with PostgreSQL or MongoDB, all containerized with Docker and deployed on AWS or GCP. Every API includes automated testing, Swagger documentation, and rate limiting from day one.
We deliver a production-ready API in 8-12 weeks with a fixed price starting at $80K-$250K. Each API is built by senior engineers with compliance support for HIPAA, PCI-DSS, or SOC 2. You get full code ownership, CI/CD pipelines, and a 30-day warranty after launch.
CTOs hire us when they need a scalable API without hiring a full internal team. Startup founders hire us to ship their backend before funding runs out. Product managers work with us when their existing dev team lacks Node.js depth. Venture-backed companies trust us for SOC 2 ready infrastructure from week one.
Types of software we ship.
REST API
Stateless RESTful APIs with Express.js, JWT auth, and PostgREST for CRUD operations. Swagger docs included.
GraphQL API
Single-endpoint GraphQL APIs using Apollo Server, Prisma ORM, and DataLoader for N+1 prevention.
Event-Driven API
Event-driven APIs with RabbitMQ or Kafka, handling async jobs, notifications, and webhook delivery at scale.
WebSocket API
Real-time WebSocket APIs using Socket.IO for live chat, notifications, and collaborative editing.
Microservices API Gateway
API gateway using Kong or Fastify that routes requests to 10+ microservices with auth and rate limiting.
Payment API
Stripe or Braintree integration APIs with idempotent endpoints, webhook signature verification, and PCI-DSS compliance.
Internal API
Internal microservices APIs for ETL pipelines, data sync between ERP and CRM, with Redis caching.
Third-Party API Integration
API wrappers for Slack, HubSpot, Salesforce, or Shopify with retry logic, logging, and OAuth2 flows.
We build for every business type.
Healthcare
Fintech
Ecommerce & SaaS
Real Estate & Logistics
Media & Travel
Why the Best Node.js API Development Agency Delivers Scalable APIs
Speed means nothing without reliability. Every API is designed for 10x traffic without rewrites.
IRPR has shipped over 200 products across 50 countries. Each Node.js API receives load testing at 50,000 requests per minute before launch. We use managed databases (RDS, Cloud SQL) and auto-scaling groups on AWS or GCP to handle traffic spikes without manual intervention.
We enforce strict code quality. Every pull request requires 2 senior engineer reviews. Our test coverage averages 92% across API projects. We use Sentry for error tracking and Datadog for performance monitoring. This means your API stays up 99.9% of the time, even under heavy load.
Generic Dev Shop vs the Best Node.js API Development Agency
Not all agencies deliver production-grade APIs. Here is how IRPR differs.
Many agencies start coding without a clear contract or technical spec. They use hourly billing, change requirements mid-project, and hand off code that has no tests or documentation. This leaves you with technical debt and surprise invoices.
IRPR starts with a two-week Roadmap phase where we define every endpoint, data model, and integration. We give you a fixed price and a fixed timeline. Every API ships with automated tests, Swagger docs, CI/CD pipelines, and deploy scripts. If something breaks during warranty, we fix it within 24 hours for free.
- Hourly billing with no budget cap
- No written contract for scope
- Ships code without tests
- No monitoring or error tracking
- No CI/CD pipeline
- Takes 20+ weeks for a simple API
- Fixed price, no surprises
- Two-week Roadmap with full spec
- 92% test coverage average
- Sentry + Datadog from day one
- GitHub Actions CI/CD included
- 8-12 week delivery guarantee
How IRPR Builds Your Node.js API in 8-12 Weeks
A repeatable process that eliminates guesswork.
Phase 1 is the Roadmap. We interview your team, review your existing systems, and write a detailed document with all API endpoints, data models, auth flows, and integration points. You approve the spec before any coding begins.
Phase 2 is the Build. We develop the API in two-week sprints. Every sprint ends with a demo where you see running code. We deploy to staging so you can test endpoints directly. Phase 3 is Release. We deploy to production, set up monitoring, and hand over documentation. You get a 30-day warranty with a 24-hour response SLA.
What Ships with Every Node.js API from IRPR
No hidden scope. Everything listed here is included in the fixed price.
Many agencies deliver a zip file of code and disappear. IRPR gives you the full package: source code, deployment scripts, monitoring, and documentation. You own everything. You can deploy independently or IRPR can manage ongoing hosting.
- Source code in your private GitHub repository
- CI/CD pipeline using GitHub Actions
- Automated test suite (92% avg coverage)
- Swagger/OpenAPI documentation
- Docker containers for every service
- Sentry error monitoring configured
- Datadog APM and uptime monitoring
- Rate limiting and input validation
- Redis caching layer for high-read endpoints
- Deployment runbook and Postman collection
What we ship in this practice.
Healthcare Patient Data API
Built a HIPAA-compliant API for a telehealth startup that handles 100,000+ patient records. The API reduced patient data retrieval time by 40% using PostgreSQL and Redis caching. Stack: Express.js, PostgREST, AWS RDS, Redis.
Fintech Payment Reconciliation API
Developed a PCI-DSS compliant API for a payment processor that reconciles 500,000 transactions daily. The API automated 90% of manual reconciliation work. Stack: Fastify, Prisma, Stripe, AWS Lambda.
Ecommerce Inventory Sync API
Built a real-time inventory sync API for a retailer with 50,000 SKUs across 10 warehouses. The API reduced stockout incidents by 60% using WebSockets and Kafka. Stack: NestJS, RabbitMQ, MongoDB, GCP Cloud Run.
SaaS Subscription Management API
Created a subscription billing API for a B2B SaaS company that processes $2M in monthly recurring revenue. The API handles plan upgrades, proration, and invoice generation. Stack: Express.js, Stripe, PostgreSQL, AWS ECS.
Real Estate MLS Data API
Developed a high-throughput MLS data API that ingests 1 million property listings weekly. The API enables real-time search and geolocation queries. Stack: Fastify, Elasticsearch, PostgreSQL, AWS ElastiCache.
Logistics Route Optimization API
Built a vehicle routing API for a trucking company that reduces delivery time by 25%. The API calculates optimal routes for 500+ trucks daily using OSRM and PostgreSQL. Stack: NestJS, RabbitMQ, Redis, Azure Kubernetes.
Why teams hire us.
Fixed price, not hourly billing
Every Node.js API project gets a fixed quote after the Roadmap phase. No hourly billing means no budget surprises. Our average project costs $80K-$250K, and we deliver within that number.
Senior engineers only, no juniors
IRPR does not staff juniors. Every engineer has 8+ years of Node.js experience. We never offshore work or use cheap labor. Every API is architected by a senior who has shipped at least 5 production APIs.
Production-grade monitoring from day one
We configure Sentry and Datadog on every API project. You get real-time error alerts, performance dashboards, and uptime monitoring. Our average API maintains 99.9% uptime in production.
Full code ownership with no lock-in
You own every line of code. We push to your GitHub repository. There are no licensing fees, no platform lock-in, and no ongoing royalties. The API is yours to deploy anywhere.
Compliance-ready for HIPAA, PCI-DSS, SOC 2
We build APIs that pass audits. Our healthcare APIs use encrypted data at rest and in transit. Fintech APIs follow PCI-DSS card data handling rules. SaaS APIs match SOC 2 controls for logging and access.
30-day warranty with 24-hour SLA
After launch, you get 30 days of free bug fixes. We respond to critical issues within 24 hours. Most other agencies hand over code and disconnect. We stay on to make sure your API runs smoothly.
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.