Joni Halder
@jonihalder
Frontend developer specializing in React.js, building performant, accessible, responsive web applications.
IndiaWhat I'm looking for
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
Frontend Developer
Personal Projects
Aug 2025 - Present (10 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+).
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.
Education
Degrees, certifications, and relevant coursework
Gangarampur College, University of Gour Banga
Bachelor of Arts, Arts
2022 -
Pursuing a Bachelor of Arts degree focused on foundational liberal arts coursework with anticipated completion in August 2025.
Gravity Coding School
Certificate, Frontend Development
2024 - 2025
Completed a React.js Frontend Developer certificate program covering modern frontend development practices and React ecosystem tools.
Tech stack
Software and tools used professionally
Availability
Location
IndiaAuthorized to work in
Job categories
Skills
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