Open to opportunities

Joni Halder

@jonihalder

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Frontend developer specializing in React.js, building performant, accessible, responsive web applications.

India

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What I'm looking for

I seek frontend roles focused on React.js where I can build performant, accessible user interfaces, work with Firebase/APIs, and grow within a collaborative team.

I am a Frontend Developer focused on creating responsive, scalable web applications with React.js, Redux Toolkit, Tailwind CSS, and modern JavaScript (ES6+). I prioritize performance, accessibility, and clean code, and I have delivered projects with high Lighthouse scores and measurable user engagement improvements.

My hands-on experience includes building multi-step apps with Firebase authentication and storage, role-based dashboards, and AI-enhanced tools that accelerate content creation. I deploy using Vercel and Netlify and use tools like Vite, Git, and npm to maintain fast, reliable development workflows.

I value reusable components, cross-browser compatibility, and data-driven improvements — demonstrated by projects that improved mobile engagement by 25%, raised performance by 30%, and achieved 94–95+ Lighthouse scores. I bring practical internship and project experience and a strong foundation in responsive design and API integration.

Experience

Work history, roles, and key accomplishments

Current

Frontend Developer

Current

Personal Projects

Aug 2025 - Present (4 months)

Built multiple production web apps including an AI-powered Job Post Analyzer (Gemini API, Firebase) that sped content creation by 60% and a resume builder and LMS deployed on Vercel/Netlify with 90+ Lighthouse scores and active user bases (50–200+).

Firebase Gemini API Vercel Netlify

Frontend Developer

CollegeTips.in

May 2025 - Jun 2025 (1 month)

Designed and deployed a pet adoption site and an "Empowering Digital Literacy" platform using React.js and Tailwind CSS, increasing mobile engagement by 25% and serving 200+ users; improved cross-browser compatibility and boosted performance by 30% via Lighthouse-driven optimizations.