Bangalore, India

lipak.me@gmail.com

+917795505029

Lipak Sahu

Senior Full‑Stack JavaScript Developer

Profile

Senior Full‑Stack Engineer with 10+ years building, scaling, and optimizing JavaScript applications end‑to‑end. Proven delivery of enterprise products used by millions and AI‑powered platforms with measurable impact. Specialized in React, Node.js, and applied AI (OCR, LLMs), with experience leading projects from concept to production.

Highlights & Key Technical Achievements

  • AI Platform Development: Built production systems with 99%+ OCR accuracy using OpenAI and Google Vision API; automated manual workflows and reduced processing time by hours/day.
  • Performance Optimization: Delivered 40% faster content delivery and 35% improved load times through front‑end and API optimizations.
  • Full‑Stack Delivery: Led end‑to‑end development across React web apps, PWAs/mobile apps, and Node.js backends with robust data modeling and reporting.

Employment History

Senior Full-Stack Engineer at Oeta, Bangalore

May 2024 – Present

  • Architected full-stack AI-powered construction fleet management platform using React, Node.js, OpenAI GPT-4, and Google Vision API.
  • Implemented advanced OCR system achieving 99% document processing accuracy, automating manual data entry for weighbridge operations.
  • Developed integrated ecosystem including responsive Admin Portal, PWA Field App, and mobile Employee App with real-time synchronization.
  • Built scalable backend services handling 1000+ vehicles with real-time data processing, automated analytics, and comprehensive reporting systems.
  • Engineered offline-first architecture with WhatsApp integration, ensuring functionality in low-connectivity construction environments.
  • Published Oeta Employee Android app to Google Play (100+ downloads) with geofencing and biometric check-in/out, powering on-site workforce operations.

Product Engineer III at Forma, (Remote)

December 2021 – February 2025

  • Architected scalable web applications serving employee benefits platform, delivering innovative solutions for complex business requirements.
  • Optimized application performance and scalability using React.js, TypeScript, and Node.js resulting in 35% faster load times.
  • Implemented robust backend services using NestJS, MongoDB, and PostgreSQL handling thousands of user transactions securely.
  • Collaborated with product and design teams to deliver complex features on schedule while maintaining high code quality standards.

Technical Expertise

- Frontend • JavaScript • TypeScript • React • PWA • Responsive Design • HTML5 • CSS3 • Styled Components - Backend • Node.js • Express.js • NestJS • RESTful APIs • MongoDB • PostgreSQL • Redis • BullMQ • JWT Authentication • WhatsApp Cloud API - AI/ML & APIs • OpenAI GPT‑4 API • Google Vision API • OCR Technology • LangChain • LangGraph • RAG • AI Agents - Cloud & DevOps • GCP • DigitalOcean • Docker • Microservices • CI/CD • Vercel • GitHub Actions • Git - Mobile & Tools • React Native • Progressive Web Apps

Education

Bachelor of Technology (B.Tech)

Computer Science & Engineering

Centurion University, India, Bhubaneshwar

2009 - 2013

Languages

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

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.