Hire a Custom API Development FirmDevelopment Firm
We build REST, GraphQL, and gRPC APIs for SaaS platforms, mobile backends, and data pipelines. Senior engineers only, fixed price, 8-12 week delivery.
IRPR is a custom API development firm that designs and builds production-grade APIs for web, mobile, and enterprise systems. We use Node.js, Python, Go, and Rust to create REST, GraphQL, and gRPC endpoints with PostgreSQL, Redis, and Kubernetes for scale.
Every project ships in 8-12 weeks with a fixed price between $80K and $250K. Our APIs pass PCI-DSS, HIPAA, SOC 2, and FERPA audits. We provide full documentation, Postman collections, OpenAPI specs, and 99.9% uptime SLAs.
CTOs hire us when their in-house team lacks API bandwidth. Product managers hire us to launch a new integration layer. Tech founders hire us to build the backend for their MVP. Enterprise architects hire us to unify legacy systems with modern APIs.
Types of software we ship.
RESTful API Development
Stateless, resource-oriented APIs using Node.js, Express, or Python FastAPI with JWT auth and MongoDB or PostgreSQL.
GraphQL API Development
Single endpoint, typed schemas with Apollo or Yoga. Supports real-time subscriptions and federated gateways.
gRPC API Development
High-performance, language-agnostic RPC using Protocol Buffers. Ideal for microservices and IoT backends.
API Integration Services
Connect existing systems to third-party APIs (Stripe, Salesforce, Twilio, OpenAI) with error handling and retry logic.
Microservices API Architecture
Decoupled, independently deployable services with message brokers like RabbitMQ or Kafka and Docker orchestration.
Real-Time API Development
WebSocket and Server-Sent Events APIs for live dashboards, chat apps, and collaborative tools using Socket.io or Pusher.
Internal API Development
Private APIs for employee-facing tools, BI systems, and internal workflow automation with role-based access control.
Public API Development
Developer-facing APIs with API keys, rate limiting, usage analytics, and developer documentation portals using Swagger/OpenAPI.
We build for every business type.
SaaS
Ecommerce
Healthcare
Fintech
Manufacturing
Why You Need a Custom API Development Firm
Your business depends on APIs to connect customers, partners, and internal tools.
Pre-built API gateways and low-code tools can wire up simple integrations, but they break under high traffic, complex business logic, or strict compliance rules. A custom API development firm like IRPR builds APIs that handle 10,000 requests per second, pass HIPAA or PCI-DSS audits, and scale to millions of users.
APIs built with generic frameworks often lack proper error handling, rate limiting, or monitoring. IRPR includes Sentry error tracking, Datadog logging, and Prometheus metrics in every project. We also provide a full Postman collection and an OpenAPI spec so your team can test and integrate from day one.
Generic Dev Shop vs. IRPR: The Real Difference
Most agencies treat your API as a side project. IRPR treats it as the product.
Generic dev shops start coding in week 1 with no API contract, no threat model, and no performance budget. They deliver a monolithic endpoint that works on localhost but fails under load. Then they charge hourly for fixes.
IRPR starts with an OpenAPI spec and a performance benchmark agreed in week 2. We build stateless, horizontally scalable services with automated tests and CI/CD from day one. You get source code, infrastructure as code, and a 99.9% uptime SLA.
- Starts coding without an API contract
- No rate limiting or authentication in MVP
- Hourly billing encourages slow work
- No monitoring or alerting
- Delivers a Postman collection at best
- Code ownership is often unclear
- OpenAPI spec approved before week 3
- JWT, OAuth 2.0, API keys built in
- Fixed price from Roadmap phase
- Sentry + Datadog + Prometheus by default
- Full Postman collection + OpenAPI spec
- 100% source code ownership
How IRPR Builds Your Custom API
Four phases, each with a clear deliverable and a go/no-go decision.
IRPR uses a sprint-based process that keeps your team in the loop without slowing down our engineers. Every phase ends with a demo and a written acceptance sign-off.
You control the schedule. If you need to pause for a quarter, we pick up where we left off. No restart fees, no lost context.
What Ships with Every API Project
We deliver more than code. You get the entire production stack.
Most agencies hand you a Git repo and disappear. IRPR gives you the runtime, the dashboards, and the runbook so your team can operate the API from day one.
We deploy to your AWS, GCP, or Azure account. You control the keys. We just provide the automation.
- Source code in your private GitHub/GitLab repo
- OpenAPI 3.0 specification as a living document
- Postman collection with example requests
- CI/CD pipeline on GitHub Actions with automated tests
- Docker container images pushed to your registry
- Terraform or Pulumi infrastructure as code
- Sentry error tracking with alert rules
- Datadog or Grafana dashboards for latency and traffic
- 99.9% uptime SLA with monitoring runbook
- Full technical documentation in markdown
What we ship in this practice.
SaaS Billing API for Subscription Platform
Built a RESTful API managing 50,000+ subscriptions with Stripe integration, usage metering, and proration. Reduced billing errors by 95%. Stack: PostgreSQL, Node.js, Stripe, Redis, Docker.
HIPAA-Compliant Patient Data API
Created a GraphQL API for a telehealth app that serves 500+ clinics. All endpoints HIPAA-compliant with end-to-end encryption. Achieved 99.9% uptime. Stack: Python, FastAPI, PostgreSQL, AWS KMS.
Payment Processing API for Fintech Startup
Designed a PCI-DSS Level 1 API handling $2M/month in transactions. Included fraud detection, tokenization, and multi-currency support. Stack: Go, gRPC, PostgreSQL, Stripe, Redis.
Real-Time Inventory API for Ecommerce
Built a WebSocket API that updates inventory across 3 warehouses in under 200ms. Integrated with Shopify and ShipStation. Reduced overselling by 100%. Stack: Node.js, Socket.io, RabbitMQ, MongoDB.
Internal API for Manufacturing ERP
Unified 4 legacy ERP systems into a single RESTful API service. Exposed 120+ endpoints for order management, inventory, and quality control. Cut data retrieval time from 30 minutes to 2 seconds. Stack: Python, FastAPI, PostgreSQL, Kafka.
Public Developer API for EdTech Platform
Delivered a FERPA-compliant public API with rate limiting, usage analytics, and developer docs. 50+ third-party integrations in the first 6 months. Stack: Node.js, Apollo, Redis, GraphQL.
Why teams hire us.
Fixed Price, Not Hourly
Every API project gets a fixed quote during the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges. You know the cost before we write any code.
Senior Engineers Only
We do not hire juniors. Every engineer on your project has 8+ years of backend experience. Your API is built by someone who has shipped at least 10 production APIs before.
OpenAPI Spec Before Code
We write the OpenAPI 3.0 spec and get your sign-off before writing a single line of code. Your team can start building integrations in parallel. No rework, no miscommunication.
Automatic Compliance Support
We bake HIPAA, PCI-DSS, SOC 2, and FERPA controls into the architecture from day one. Audit preparation is included, not an add-on. We have passed 12 compliance audits with zero findings.
Full Ownership, No Lock-In
You own 100% of the source code, infrastructure config, and documentation. We deploy to your cloud account. You can fire us after week 1 and still have a running API.
2-Week Sprints, Live Demos
Every 2 weeks you see a working, deployed endpoint with automated tests and monitoring. You can change priorities at the end of any sprint. No waterfall, no waiting for delivery day.
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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