Senior REST API Development ServicesREST API
We build production-grade REST APIs for apps that handle millions of requests. Fixed price, senior engineers, 8-12 week delivery.
IRPR builds senior REST API development services for companies that need reliable, scalable integrations. We use Node.js, Python (FastAPI), Go, and Java (Spring Boot) with PostgreSQL, Redis, and Kafka for high-throughput systems.
Every senior REST API development project ships in 8-12 weeks with a fixed price between $80K and $250K. We handle compliance for HIPAA, PCI-DSS, and SOC 2 out of the box. Your API is documented with OpenAPI 3.0 and deployed on AWS or GCP with CI/CD.
We work with CTOs who need a secure API for their SaaS platform, product managers integrating third-party services, and engineering leads who want to offload API development to a senior team without hiring.
Types of software we ship.
Public REST API
Expose your data to external developers with rate limiting, API keys, and usage analytics. Built with Kong or AWS API Gateway.
Internal Microservice API
Connect backend services with gRPC and REST. We use RabbitMQ for async messaging and Docker for isolation.
Third-Party Integration API
Sync data between Salesforce, Stripe, HubSpot, and your app. We handle webhooks, retries, and idempotency.
Real-Time Data API
Stream live data via WebSockets or Server-Sent Events. Built with Socket.IO or AWS AppSync.
File Upload & Processing API
Accept images, PDFs, and CSVs with multipart uploads. We use S3 presigned URLs and Lambda for processing.
Search API
Full-text and faceted search over your data using Elasticsearch or Algolia. Supports pagination, filtering, and ranking.
Payment API
Process payments, subscriptions, and refunds via Stripe or Braintree. PCI-DSS compliant with tokenization.
Admin Dashboard API
CRUD operations for internal tools with role-based access control. Built with Django REST Framework or Express.
We build for every business type.
Healthcare and life sciences
Financial services and fintech
Ecommerce and retail
SaaS platforms
Media and content
Senior REST API Development Services: What You Get
Every API we build is production-ready from day one, with all the components a senior team expects.
Our senior REST API development services include OpenAPI 3.0 documentation, automated testing (unit, integration, load), and deployment scripts. We use GitLab CI or GitHub Actions for continuous delivery. Every endpoint has rate limiting, authentication (OAuth 2.0 or JWT), and structured error responses.
We also provide monitoring dashboards with Datadog or New Relic. You get real-time alerts on latency, error rates, and throughput. Deployment includes staging and production environments with blue-green rollouts. All code is yours in a private repository.
How IRPR Differs from Generic API Shops
Most agencies build REST APIs that work today but break tomorrow. IRPR builds APIs that scale with your business.
Generic dev shops often write monolithic APIs without proper caching, rate limiting, or monitoring. They use junior developers who copy-paste code from Stack Overflow. After six months you hit performance bottlenecks and security gaps.
IRPR assigns senior engineers with 10+ years of experience. We design APIs with horizontal scaling in mind. Every API includes Redis caching, database indexing, and load testing. We also enforce OpenAPI standards so your frontend and mobile teams can work in parallel.
- Junior developers with no API specialization
- No documentation until the end
- Monolithic code that can't scale
- No rate limiting or security hardening
- No CI/CD pipeline
- Hourly billing with scope creep
- Senior engineers with 10+ years API experience
- OpenAPI 3.0 docs generated alongside code
- Microservice-ready with Docker and Kubernetes
- Rate limiting, OAuth 2.0, and input validation
- Automated CI/CD with GitHub Actions
- Fixed price with no surprise invoices
Our REST API Development Process in 4 Phases
We follow a structured process that turns your idea into a production API in 8-12 weeks.
Every senior REST API development project starts with a two-week Roadmap phase. We map out endpoints, data models, authentication flows, and integration points. You get a fixed price and timeline before any code is written.
Then we build, test, and deploy in two-week sprints. You see working endpoints every sprint. We use Postman collections for manual testing and Artillery for load testing. Final handover includes full documentation and a runbook.
What Ships with Every Senior REST API Development Project
You own everything. No black boxes, no hidden dependencies.
When you hire IRPR for senior REST API development services, you get the complete package. Not just endpoints. You get everything needed to run, maintain, and extend the API yourself. All code is in your GitHub or GitLab repository from day one.
- Source code in your private repository
- OpenAPI 3.0 YAML/JSON specification
- Postman collection with example requests
- CI/CD pipeline (GitHub Actions or GitLab CI)
- Docker Compose for local development
- Deployment scripts for AWS or GCP
- Monitoring dashboard (Datadog or New Relic)
- Load test results (Artillery report)
- Runbook with incident response steps
- Admin panel for API key management
What we ship in this practice.
Patient Data API for Telehealth Platform
Built a HIPAA-compliant REST API for a telehealth startup. Handles 50,000 appointments daily. Used FastAPI, PostgreSQL, and AWS KMS for encryption. Reduced data retrieval time by 60%.
Payment Aggregation API for Fintech
Created a PCI-DSS Level 1 API that routes payments through Stripe and Braintree. Supports 100+ currencies and 3D Secure. Processed $12M in first month.
Inventory Sync API for Ecommerce Brand
Developed a REST API that syncs inventory across Shopify, Amazon, and warehouse systems. Uses webhooks and idempotency keys. Eliminated overselling and saved $200K in penalties.
Customer API for SaaS CRM
Built a multi-tenant REST API for a CRM platform. Includes OAuth 2.0, rate limiting, and search via Elasticsearch. Onboards 500 new tenants per month without latency.
Property Listing API for Real Estate
Created an MLS-compliant REST API that aggregates listings from 200+ sources. Uses GraphQL for flexible queries and Redis for caching. Reduced page load time from 4s to 0.8s.
Student Data API for EdTech Platform
Built a FERPA-compliant REST API for a learning management system. Integrates with Canvas and Blackboard. Handles 1 million student records with read replicas and sharding.
Why teams hire us.
Fixed price, not hourly
Every senior REST API development project gets a fixed quote after the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges.
Senior engineers only
We assign engineers with 10+ years of API development experience. No juniors, no contractors. Your lead engineer has built APIs for companies like Stripe and Netflix.
8-12 week delivery
We ship production-ready REST APIs in 8-12 weeks. Our process is optimized for speed without cutting corners. 98% of projects deliver on time.
Compliance built in
We handle HIPAA, PCI-DSS, SOC 2, and FERPA compliance as part of the build. No separate audit phase. Your API is secure from the first endpoint.
Full ownership for you
You own all source code, documentation, and deployment scripts. No licenses, no recurring fees. We hand over everything on day one.
Proven track record
We have shipped 200+ REST APIs for clients in 50+ countries. Our APIs handle over 1 billion requests per month combined. You get battle-tested patterns.
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.
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