Bangalore, India

lipak.me@gmail.com

+91 77955 05029

Lipak Sahu

Senior Full‑Stack Engineer | React, TypeScript, JavaScript, Node.js, Python | AI/LLM Systems

Profile

Senior Full‑Stack Engineer with 11+ years building and scaling web products end‑to‑end, from UI architecture and performance to backend APIs, data pipelines, and AI/LLM integrations. Strong track record shipping enterprise systems and high‑traffic consumer experiences, with a focus on reliability, developer velocity, and measurable product outcomes. Primary stack: React, TypeScript, Node.js, and applied AI (OCR/LLMs).

Highlights & Key Technical Achievements

  • AI/OCR at production quality: Designed and shipped OCR-driven workflows (OpenAI + Google Vision) reaching 99%+ document extraction accuracy and automating manual operations.
  • Performance & scale: Improved load times by 35% and increased content delivery throughput by 40% through frontend and API optimization.
  • End‑to‑end ownership: Led delivery across React web apps, offline-first PWAs/mobile, and Node.js services with solid data modeling, reporting, and operational tooling.

Experience

Senior Full‑Stack Engineer (AI / LLM Systems) at llmda Inc

October 2025 – Present

  • Building and scaling LLM‑powered automation and intelligence layers for semiconductor engineering workflows.
  • Designed and shipped full‑stack capabilities across Python + JavaScript, from UI/UX to APIs, orchestration, and data pipelines.
  • Implemented backend services with robust data contracts, observability, and reliability practices for high‑precision domains.
  • Partnered with AI/ML, data, and domain experts to translate requirements into production‑ready systems and iterative releases.
  • Improved performance, maintainability, and developer experience in a complex, data‑heavy platform.

Senior Full‑Stack Engineer & Founder at Oeta (Bangalore)

May 2024 – September 2025

  • Architected an AI‑powered construction fleet platform (React, Node.js, OpenAI, Google Vision) across web, PWA, and mobile surfaces.
  • Implemented OCR pipelines achieving 99% document processing accuracy, automating weighbridge data entry and downstream workflows.
  • Delivered Admin Portal + offline-first Field PWA + Android Employee App with reliable sync in low‑connectivity environments.
  • Built backend services for real‑time processing, analytics, and reporting to support large, multi‑site operations.
  • Integrated WhatsApp workflows and operational tooling to improve adoption and reduce on-ground coordination overhead.
  • Published Oeta Employee Android app (Google Play) with geofencing and biometric check‑in/out to power workforce operations.

Technical Expertise

- Frontend • JavaScript • TypeScript • React • PWA • Responsive Design • HTML5 • CSS3 • Styled Components - Backend • Python • FastAPI • Node.js • Express.js • NestJS • RESTful APIs • MongoDB • PostgreSQL • Redis • BullMQ • JWT Authentication • WhatsApp Cloud API - AI/ML & APIs • LLMs • RAG • AI Agents • LangChain • LangGraph • OpenAI API • Google Vision API • OCR - Cloud & DevOps • GCP • DigitalOcean • Docker • Microservices • CI/CD • Vercel • GitHub Actions • Git - Mobile & Tools • React Native • Progressive Web Apps

Links

Education

Bachelor of Technology (B.Tech)

Computer Science & Engineering

Centurion University, India, Bhubaneshwar

2009 - 2013

Languages

English (Fluent) • Hindi (Fluent) • Odia (Native)

Earlier Experience

Product Engineer III at Forma (Remote)

December 2021 – February 2025

  • Shipped complex benefits platform features end‑to‑end, partnering closely with product and design to deliver on schedule.
  • Optimized React + TypeScript + Node.js performance, improving load times by 35% via profiling and targeted refactors.
  • Built backend services with NestJS, MongoDB, and PostgreSQL, focused on correctness, security, and maintainable APIs.
  • Raised engineering quality through code reviews, pragmatic standards, and reusable patterns across teams.

Senior Software Engineer at InMobi Technology, Bangalore

November 2018 – December 2021

  • Engineered CardPress CMS dashboard from scratch, replacing legacy systems and achieving 40% faster content delivery for millions of users.
  • Architected live streaming PWA application using React.js and WebRTC, scaling to serve millions of Glance users with real-time engagement capabilities.
  • Developed gamified survey/rewards PWA platform with coin-based reward system, driving user engagement and retention.
  • Built sophisticated A/B testing framework with advanced analytics dashboard, enabling data-driven optimization through interactive visualizations.

Software Engineer at Capillary Technologies, Bangalore

May 2017 – October 2018

  • Integrated multiple social communication channels (Facebook, Google, Line) into enterprise Outbound marketing platform.
  • Implemented loyalty points system in Timeline module, enhancing customer retention and brand engagement through gamification.

Web Developer at Thomson Reuters, Bangalore

Jan 2015 - May 2017

  • Delivered 150+ pixel-perfect responsive websites with 100% cross-browser compatibility using HTML5, CSS3, and JavaScript for enterprise clients.
  • Optimized web applications for all devices ensuring consistent user experience and performance across desktop, tablet, and mobile platforms.

Selected Projects

  • Oeta Employee (Android, 2024-Present): Attendance and workforce management app with geofencing and biometric check-in/out, tasks, notifications, trip details, and salary view; published on Google Play (100+ downloads). Play Store
  • Oeta Fleet Intelligence (2024‑Present): AI‑powered construction fleet platform with OCR‑driven document processing, real‑time analytics, and offline‑first PWA; stack: React, Node.js, OpenAI, Google Vision API. oeta.io
  • Glance Live PWA: Low‑latency WebRTC live streaming PWA at InMobi, scaled to millions of users with interactive engagement.
  • CardPress CMS: Next‑gen CMS for content operations at scale, improving delivery speed by 40% and enabling configurable A/B testing.