Open to opportunities

Subir Dutta

@subirdutta

Principal Frontend Engineer building scalable AI-native web apps with React, Next.js, and multi-agent LLM orchestration.

India

Message

What I'm looking for

I’m looking for a Principal Frontend Engineer role where I can build AI-native web applications with React/Next.js, lead cross-functional delivery, and own end-to-end outcomes—from WCAG frontend to FastAPI/Golang backends and RAG pipelines (remote-friendly).

I’m a Principal Frontend Engineer with 7+ years of experience architecting and delivering scalable web applications across FinTech and AI-native product domains. I specialize in React.js, Next.js, and TypeScript, with deep specialization in multi-agent LLM systems and agentic development tooling.

I’ve led end-to-end development of AI-native web applications, integrating LLMs to drive intelligent automation—reducing manual user task time by ~30% and accelerating feature delivery by ~25%. I build robust frontend solutions and orchestration logic (LangGraph) while maintaining strict security and performance compliance.

I’m comfortable owning the full stack, from pixel-precise frontend to FastAPI/Golang backends and RAG pipelines. I also establish frontend engineering standards, code-review protocols, and design-system practices to improve sprint predictability and reduce regressions.

I’ve directed cross-functional teams (5+ engineers) and mentored developers through code reviews and pair programming. Across projects, I’ve delivered performance gains (e.g., Lighthouse improvements), improved accessibility (WCAG compliance), and integrated agentic tooling into CI/CD to cut review turnaround time by ~40%.

Experience

Work history, roles, and key accomplishments

Current

Principal Frontend Engineer

Current

Saleslife AI

Apr 2026 - Present (3 months)

Spearheaded end-to-end development of AI-native web applications in Next.js, integrating custom LLMs to reduce manual user task time by an estimated 30%. Architected agentic orchestration logic (LangGraph) to accelerate feature delivery by 25% while meeting security and performance compliance.

Next.js Multi agent orchestration LangGraph Security Compliance Compliance

Lead Frontend Developer

OAYAW India Private Limited

Aug 2023 - Mar 2026 (2 years 7 months)

Led a cross-functional team of 5 to architect and launch a scalable FinTech stock-trading platform using React.js and GraphQL, supporting 10,000+ daily active sessions. Drove performance optimizations (code splitting, lazy loading, asset bundling) and integrated agentic AI tooling (Claude Code/Cursor) into CI/CD to cut code-review turnaround by 40%.

React GraphQL CI CD Claude Code Cursor Micro Frontend Architecture Lazy Loading Asset Bundles Performance Optimization Code Review

Senior Frontend Developer

Cloven & Work

Jun 2020 - Jul 2023 (3 years 1 month)

Architected a high-availability food-delivery platform from scratch using React.js and Firebase, scaling to process 5,000+ orders monthly with 99.9% uptime. Built mobile-first responsive UI and collaborated with backend teams to integrate real-time REST APIs across 15+ microservices.

React Firebase Responsive UI REST APIs Microservices Component Library Development

Frontend Developer

Planscape Studio

Jan 2019 - Jul 2020 (1 year 6 months)

Contributed to full-cycle web application development with a focus on WCAG accessibility compliance, improving audit scores by 15%. Built reusable React component libraries from UI/UX wireframes and stabilized legacy codebases by resolving cross-browser compatibility issues, reducing user-reported UI bugs by 30%.

React WCAG Accessibility Component Libraries Browser compatibility