Hire Node.js Developers — Scalable Backend Engineers

Our Node.js engineers are fluent in Express, Fastify, and NestJS. For new projects we lean toward NestJS for its modularity and TypeScript-first design, or Fastify when raw throughput matters. Express remains a solid choice for smaller services or teams with existing Express infrastructure.

Yes — TypeScript is our default for all Node.js projects. It catches bugs at compile time, improves IDE support, and makes large codebases dramatically easier to refactor. We configure strict mode and maintain type safety throughout the project, including database query results.

Yes. Our engineers regularly join mature Node.js codebases. They start with a structured code review, map dependencies, identify risks, and propose a phased improvement plan. They document assumptions and decisions so your permanent team stays in control.

We implement WebSocket servers with Socket.io or native ws, and Server-Sent Events for one-way streaming. For high-volume messaging we use Redis Pub/Sub or Kafka topics. Every real-time feature is designed with connection management, reconnection logic, and scalability across multiple server instances in mind.

Our engineers are experienced with PostgreSQL, MySQL, MongoDB, and Redis. We use Prisma or TypeORM for relational databases and Mongoose for MongoDB. We design schemas with indexing and query performance in mind from the start.

We apply JWT or session-based authentication, input validation with Zod or class-validator, parameterized queries to prevent SQL injection, CORS policies, rate limiting with Redis, and HTTP security headers via Helmet. Security is treated as a first-class concern, not a final checklist.

Yes. We design microservice architectures with clear bounded contexts, async communication via RabbitMQ or Kafka, service discovery, and API gateways. We also help teams decide whether a microservice split is actually warranted — sometimes a well-structured modular monolith is the better engineering choice.

We profile CPU and memory with the Node.js built-in profiler and clinic.js, identify event-loop blocking operations, optimize database queries with EXPLAIN ANALYZE, implement connection pooling, and add caching layers with Redis. We measure before and after so improvements are quantified.

Our engineers write unit tests with Jest, integration tests against real databases using test containers, and end-to-end API tests with Supertest. We enforce coverage thresholds in CI and write tests that exercise behavior rather than internals, so they survive refactors.

Most Node.js engagements begin within one to two weeks. We have a pipeline of vetted engineers ready to onboard. Your new developer will have a working local environment, access to your repositories, and a clear understanding of the codebase architecture within the first two days.

Yes. Kultrix offers both dedicated developer engagements (monthly) and fixed-scope project delivery. For well-defined projects, we provide a statement of work with milestones, acceptance criteria, and a fixed or capped price. You choose the model that fits your risk tolerance.

You do — entirely. We sign an IP assignment agreement before work begins. All code is committed to your repositories from day one. When the engagement ends, you retain full ownership with no licensing restrictions or ongoing dependencies on Kultrix.