JavaScript Development
Done Properly
Unicrats builds reliable JavaScript and TypeScript applications — from interactive frontends to Node.js backends, browser extensions, and real-time WebSocket applications.
JavaScript is the language of the web — browser, server, and everywhere in between. Our JS engineers write clean, typed, tested JavaScript that is maintainable at scale and fast in production.
Key benefits for your business
TypeScript First
TypeScript catches bugs at compile time, improves IDE support, and makes large codebases maintainable.
Performance Optimized
Bundle splitting, tree shaking, lazy loading, and efficient algorithms for fast user experiences.
Fully Tested
Jest unit tests, Playwright E2E tests, and integration tests for confidence in every deploy.
Real-Time Capabilities
WebSocket and Socket.io applications for live dashboards, chat, and collaborative tools.
Node.js Backends
Express, Fastify, and NestJS APIs powering web and mobile applications.
Modern Tooling
Vite, esbuild, and modern bundlers for fast development and optimized production builds.
Our JavaScript Development services
Vanilla JS / TypeScript
Interactive web experiences without framework overhead. Ideal for libraries and performance-critical UIs.
Node.js Backend
REST and GraphQL APIs with Express, Fastify, or NestJS.
Real-Time Applications
WebSocket-powered live dashboards, chat applications, and collaborative tools.
Browser Extensions
Chrome and Firefox extensions for productivity, SEO, and business tools.
NPM Package Development
Open-source and private NPM packages for reusable JavaScript functionality.
JS Migration to TypeScript
Migrate existing JavaScript codebases to TypeScript safely and incrementally.
How we deliver results
Architecture
Module structure, type design, and API contracts defined upfront.
Development
TypeScript-first development with tests written alongside code.
Code Review
Peer review, ESLint, and Prettier checks on every PR.
Deploy
CI/CD pipeline with automated testing gates.
Technologies & Tools We Use
Industries we serve
Why leading companies choose us
We are a team of 50+ specialists across SEO, development, cybersecurity, cloud, and BPO — delivering measurable outcomes for clients across the US, UK, UAE, and India.
TypeScript Default
We default to TypeScript on every project for reliability and maintainability.
Test Coverage
Minimum 80% test coverage on all business-critical JavaScript code.
Clean Handover
Documented APIs, type definitions, and README included on every delivery.
Get a free consultation
No commitment. Response within 2 hours.
Frequently asked questions
Do you work with existing JavaScript codebases?
Ready to grow your business
with JavaScript Development?
Join 100+ companies in Mumbai, India & USA that trust Unicrats for results.