Senior Node.js API Development AgencyAPI Development
We build production-grade APIs with Node.js. Your MVP ships in 8-12 weeks with a fixed price.
IRPR is a senior node.js api development agency. We assign only senior engineers with 8+ years of experience. Our architects use Node.js 20, TypeScript, Express, Fastify, GraphQL, and PostgreSQL to build APIs that handle millions of requests per day.
Every project ships in 8-12 weeks with a fixed price between $80K and $250K. We include load testing, API documentation with OpenAPI 3.0, and deployment on AWS ECS or Lambda. Our compliance track includes HIPAA, PCI-DSS, SOC 2, and FERPA.
Founders hire us to build their MVP API in 12 weeks. CTOs hire us to rebuild legacy monoliths into microservices. Product owners hire us to add a secure API layer for their mobile app. Each gets a senior team with a single point of contact and weekly demos.
Types of software we ship.
REST API
Stateless endpoints using Express or Fastify. Includes JWT auth, rate limiting, and Swagger docs.
GraphQL API
Flexible queries with Apollo Server or Yoga. Resolvers, batching with DataLoader, and schema stitching.
WebSocket API
Real-time bidirectional communication using Socket.io or ws. Supports chat, live updates, and notifications.
Microservices API
Decoupled services with message queues (RabbitMQ, SQS). Each service runs in its own container on Kubernetes.
Serverless API
Lambda functions behind API Gateway. Scales to zero when idle. Includes DynamoDB, EventBridge, and Step Functions.
Third-party API Integration
Connect to Stripe, Salesforce, HubSpot, Twilio, or any REST/SOAP API. Error handling and retry logic built in.
API Gateway & Proxy
Central entry point with Kong or NGINX. Handles auth, rate limiting, caching, and routing to multiple backends.
B2B API Product
Monetized API for partners with usage tracking via Stripe Metered Billing, API keys, and developer portal.
We build for every business type.
SaaS platforms
eCommerce & marketplaces
healthcare & fintech
media & content
logistics & real estate
Why hire a senior node.js api development agency
Your API needs to be fast, secure, and maintainable for years.
One junior developer can build a basic REST endpoint in a week. But production APIs need horizontal scaling, automated testing, error handling, and security patching. IRPR assigns senior engineers who have shipped APIs for companies processing over $1B in transactions. We use Node.js 20 with TypeScript for type safety and ESLint + Prettier for code consistency.
Every API we build includes Prometheus metrics, structured logging with Winston, and a CI/CD pipeline with Jest + Supertest. We deploy to AWS with auto-scaling groups and CloudWatch alerts. Our APIs achieve 99.9% uptime in production. You own the code and the infrastructure source from day one.
Generic dev shop vs senior node.js api agency
Most agencies assign junior talent and bill hourly. IRPR does not.
When you hire a generic development shop, you often get a junior developer who follows YouTube tutorials. They use deprecated packages, ignore error handling, and leave security holes. The project runs over budget because the initial estimate was low. You end up with a monolithic Express app that fails under load.
IRPR assigns a senior architect and two engineers who have built APIs for 50+ countries. We write a detailed Roadmap in week 2 with a fixed price. We use Fastify or Apollo Server with built-in validation. Every endpoint is tested with 95%+ coverage. We include API documentation, load test scripts, and a deployment playbook.
- Junior developers with 2 years experience
- Hourly billing, no fixed price
- No separate architecture phase
- Low test coverage, often under 50%
- No load testing before launch
- No documentation beyond inline comments
- Senior engineers only (8+ years)
- Fixed price after Roadmap phase
- Detailed architecture document with decision log
- 95%+ code coverage with Jest + Supertest
- Load testing with k6 to find bottlenecks
- OpenAPI 3.0 docs published automatically
How we build your node.js API in 4 phases
Our process is transparent and designed to remove risk.
Phase 1 is the Idea session where we map your requirements. Phase 2 is the Roadmap: we produce a detailed technical document with API endpoints, database schema, and hosting architecture. You get a fixed price and timeline. Phase 3 is the Build: we code in 2-week sprints with daily standups and weekly demos. Phase 4 is the Release: we deploy to production, set up monitoring, and hand over the repository and credentials.
During the Build phase, we maintain a CI/CD pipeline on GitHub Actions that runs linting, unit tests, integration tests, and security scans (Snyk). We deploy staging environments for every pull request. You review the API in real time. No surprises.
What ships with your node.js API
Every project includes these deliverables by default.
You get more than code. Every API project ships with infrastructure as code, automated testing, and monitoring. We transfer all accounts and credentials during handoff. You can take over operations immediately or we can provide ongoing support at a fixed monthly rate.
Source code is in your GitHub repository from day one. We use Terraform for AWS resources and GitHub Actions for CI/CD. Documentation is generated from OpenAPI specs and published to a developer portal. No black boxes.
- Source code in your private GitHub repo
- CI/CD pipeline with GitHub Actions
- OpenAPI 3.0 documentation (Swagger UI)
- Unit and integration tests (95%+ coverage)
- Load testing scripts (k6)
- Docker Compose local development setup
- Terraform scripts for AWS infrastructure
- Monitoring dashboards (CloudWatch, Grafana)
- Sentry error tracking and alerting
- 2 weeks of post-release support
What we ship in this practice.
Healthcare appointment scheduling API
Built a HIPAA-compliant REST API for a telemedicine startup. Handles patient data, provider availability, and video call initiation. Integrated with Twilio Video and Stripe. Reduced scheduling errors by 95% and cut no-show rate by 40%. Tech stack: Node.js, Express, PostgreSQL, Twilio, Stripe.
eCommerce product catalog GraphQL API
Replaced a slow REST API with a GraphQL API for an online furniture retailer. Enabled the frontend to fetch product details, inventory, and pricing in a single query. Cut page load time from 4 seconds to 600ms. Tech stack: Node.js, Apollo Server, DynamoDB, Redis, CloudFront.
Fintech payment processing microservice
Built a PCI-DSS compliant payment microservice for a lending platform. Handles ACH transfers, card payments, and reconciliation. Integrated with Plaid for bank verification. Processed $2M in transactions in the first month. Tech stack: Node.js, Fastify, PostgreSQL, Plaid, Stripe.
Real estate MLS data API
Created an API that aggregates MLS feeds from 12 sources into a unified JSON format. Handles geocoding, image resizing, and property status updates. Reduced data ingestion time from 24 hours to 15 minutes. Tech stack: Node.js, Express, MongoDB, AWS Lambda, Mapbox.
SaaS usage tracking and billing API
Built a metered billing API for a SaaS platform that charges per API call. Tracks usage in real time, generates invoices, and syncs with Stripe. Enables customers to view usage dashboards. Tech stack: Node.js, Express, PostgreSQL, Redis, Stripe.
Media streaming platform WebSocket API
Developed a real-time WebSocket API for a live video chat app. Supports thousands of concurrent connections with sub-100ms latency. Includes moderation tools and recording storage. Tech stack: Node.js, Socket.io, Redis, AWS ECS, S3.
Why teams hire us.
Senior engineers only
Every developer on your project has 8+ years of Node.js experience. We do not hire juniors or outsource. Our team averages 10 years in production-grade API development.
Fixed price, not hourly
You get a fixed price after the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges. The price covers development, testing, deployment, and 2 weeks of support.
8-12 week delivery
Your API ships in 8 to 12 weeks from kickoff. We use proven architectures and avoid re-inventing the wheel. 98% of our projects deliver on time or earlier.
Full compliance built in
We have delivered APIs under HIPAA, PCI-DSS, SOC 2, and FERPA. Our compliance checklist includes audit logging, encryption at rest and in transit, role-based access, and SIEM integration.
You own everything
Source code, infrastructure scripts, documentation, and domain are yours. No licensing fees, no recurring royalties. We transfer all accounts and root credentials at handoff.
99.9% uptime guarantee
We design for production reliability from day one. Multi-region deployment, auto-scaling, circuit breakers, and Chaos Engineering testing. Every API includes a monitoring stack.
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.