Node.js Development Company Building TypeScript-First APIs, Real-Time Systems, and AI Backends
TypeScript by default. Written architecture document before code. Fastify for high-throughput APIs, NestJS for enterprise backends. BullMQ for job queues. Prisma for type-safe database access. LLM integration with streaming, orchestration, caching, and error handling. The Node.js practice that does not cause problems in production.
TypeScript-First Node.js — Written Architecture Before Code
Most Node.js backend problems are not technology problems. They are architecture problems discovered in production. We document every data model, API contract, authentication strategy, and infrastructure decision before the first line of code — and we enforce TypeScript strict mode so type errors never reach production.
Why TypeScript-First Node.js Prevents the Problems Others Debug Later
JavaScript backend problems are well-documented: runtime type errors that a compiled language catches at build time, data model drift between API contracts and database schema, authentication edge cases that surface under load, and LLM integration that works in a demo and fails in production because streaming error recovery was not considered. TypeScript strict mode, Prisma's type-safe query builder, and Zod request validation together eliminate the majority of these failure modes before deployment.
TypeScript strict backend vs untyped JavaScript — six months in
| Problem | Untyped JavaScript | TypeScript Strict Mode |
|---|---|---|
| Type errors | Runtime errors in production | Caught at compile time, zero runtime surprises |
| API contract drift | Frontend and backend disagree silently | Shared types enforced at compile time |
| Database schema drift | ORM model diverges from DB schema | Prisma generates types from schema automatically |
| LLM streaming errors | Unhandled in production | Error recovery and abort handling typed and tested |
| Onboarding new devs | Requires reading all the code to understand types | Types serve as enforced documentation |
Our Node.js Development Services
REST and GraphQL API Development
TypeScript REST APIs built with Fastify (high-throughput) or NestJS (enterprise DI and testing patterns). GraphQL with type-safe resolvers and DataLoader for N+1 prevention. Every API ships with OpenAPI documentation generated from the code.
LLM and AI Backend Development
Node.js backends that integrate OpenAI, Anthropic, Llama, and open-source models correctly. Streaming response handling, tool use orchestration, embedding generation, vector database querying (Pinecone, Weaviate), semantic search, and RAG (Retrieval-Augmented Generation) pipelines.
Real-Time Application Backends
WebSocket servers with Socket.io or native ws, Server-Sent Events for streaming AI responses, BullMQ for distributed job processing, and event-driven architecture for systems that need to react to state changes without polling.
Database Architecture and Prisma
PostgreSQL schema design, Prisma ORM with generated TypeScript types, query optimization, index strategy, database migration management, and connection pooling configuration. Type-safe queries from the first migration.
Microservices and API Gateway
Microservice decomposition from monolith, inter-service communication patterns (REST, gRPC, message queues), API gateway configuration, service mesh basics, and distributed tracing. We design for the complexity your scale actually requires — not the complexity a conference talk made sound exciting.
n8n Workflow Integration
Backend automation using n8n that extends your Node.js application without custom development for every workflow. Automated triggers, data sync between services, AI workflow orchestration, and event-driven business logic that runs reliably without a custom queue implementation.
Real Results from Real Client Projects
Custom build — #1 rankings across the entire service area
The same engineering discipline we apply to every project. Clean architecture, semantic code, schema markup, and n8n automation for monitoring. One team, full ownership from architecture to production.
Google Business Profile, Mar–Aug 2026
Our Development Process
Free Technical Discovery
System review, API requirements analysis, data model assessment, and written technical direction.
Architecture Document
Data models, API contracts, auth strategy, database schema, queue design, and infrastructure topology. You approve before code starts.
Project Setup and Toolchain
TypeScript strict, Prisma, linting, testing framework, CI/CD pipeline, and environment configuration.
Sprint Development
Two-week sprints with working APIs on staging, integrated tests, and code review.
Load Testing and Security Review
API load testing, authentication edge case review, SQL injection and injection attack surface review.
Production Deployment and Documentation
OpenAPI documentation, environment runbook, and developer handover documentation.
Why Choose Hyxil for Node.js Development
No any types, no as casts, no runtime surprises that a compiler would have caught.
Every API contract, data model, auth strategy, and infrastructure decision explicit before development begins.
Streaming, orchestration, caching, error recovery, and vector database integration. Not just an OpenAI API call.
WebSockets, SSE, BullMQ, and event-driven architecture for systems that need to react, not poll.
Types generated from schema. Query errors caught at compile time. Database and code always in sync.
Workflow automation that extends your backend without rebuilding it for every new integration.
TypeScript-first Node.js backends — documented before code, built to stay maintainable
TypeScript strict. Written architecture. Prisma type-safe queries. LLM streaming handled correctly. Fixed price.
Ready to build a Node.js backend that does not cause production incidents?
Book a free technical discovery call. We review your API requirements, propose an architecture, and give you a written technical direction — whether you hire us or not.
Services Delivered Across These Industries
SaaS products · AI-powered applications · Real-time platforms · Enterprise integrations · Fintech · Healthcare data · Logistics · Ecommerce backends · Internal API platforms
Frequently Asked Questions
Why TypeScript for Node.js backends?+
How much does Node.js development cost?+
What framework do you use — Fastify or NestJS?+
Do you integrate LLMs into Node.js applications?+
What database do you use?+
Ready to Build a Node.js Backend That Stays Maintainable in Production?
Written technical recommendation within one week · Fixed price · No commitment