Vinay Kumar

React.js Developer

Hyderabad, India 2+ yrs exp 91 · Outstanding

About

Frontend Developer with 3 years of production experience building and owning features end-to-end in React.js, JavaScript (ES6+), and TypeScript. Track record of taking work from requirements through release: integrating REST APIs and authentication, improving performance (40% gains via code splitting and memoization), and hardening reliability with error boundaries, retry logic, and test coverage (Jest/RTL). Comfortable in fast-moving, cross-functional teams where priorities shift and ownership matters.

Skills & Expertise (43)

React.js Advanced

8.5/10

Years Exp

Typescript Advanced

8.0/10

Years Exp

Git Intermediate

7.5/10

Years Exp

Next.js Intermediate

7.5/10

Years Exp

GraphQL APIs Intermediate

7.0/10

Years Exp

RESTful APIs Intermediate

7.0/10

Years Exp

Agile Intermediate

7.0/10

Years Exp

Scrum Intermediate

7.0/10

Years Exp

REST APIs Advanced

7.0/10

Years Exp

SQL Intermediate

7.0/10

Years Exp

Docker Intermediate

6.5/10

Years Exp

Python FastAPI Intermediate

6.5/10

Years Exp

LangGraph Jest RTL Figma Code Review LangChain Webpack SCSS React Router Material-UI (MUI React Testing Library (RTL Vitest Claude Code Codex Axios CSS3 Hooks Context API HTML5 Redux Toolkit Zustand Tailwind CSS bootstrap Vite JWT OAuth2 WebRTC Postgresql Javascript (ES6+ GitHub DOM APIs

Work Experience

Frontend Developer

RandomTrees

Sep 2023 - Present

Owned reusable React.js component libraries, built and shipped end-to-end, cutting code duplication by 35% across enterprise applications. Improved application performance by 40% via code splitting, lazy loading, memoization, and bundle optimization. Integrated REST APIs and authentication workflows (JWT, RBAC) into production apps, coordinating with Python FastAPI, SQL, and PostgreSQL backends. Improved reliability with retry logic, error boundaries, and structured edge-case handling.