Hardik Jain

engineering digital magic
Portfolio • LinkedIn • GitHub • Twitter

Work Experience

FitPage

Dec 2023 – Present
  • Flutter
  • Nest.js
  • PostgreSQL
  • Docker
  • Swift
  • Kotlin
  • AI
Software EngineerMay 2024 – Present
  • Developed an offline-first, peer-to-peer sync layer to support large event operations, enhancing multi-device reliability and user experience at scale.
  • Collaborated with product and design teams to architect and launch RunBuddy, an AI-powered RAG chatbot that increased session times by 5x and improved weekly active users by over 50%.
  • Developed community features and in-app integrations to improve user engagement and retention.
App Developer InternDec 2023 – May 2024
  • Integrated Flutter framework with native iOS and Android functionalities to improve app performance and user experience.

Projects

Text completion (old school: pre llm)Live

Aug 2025 – Present
  • A text completion web app that predicts the next word based on the previous words using n-gram models and Markov chains.

N-gram models · Markov chains

Random but fair (blum integer coin toss)Live

Jul 2025 – Aug 2025
  • The coin flip you can’t cheat: provably fair online coin toss secured with cryptographic commitment + reveal over WebSockets.

Cryptography · WebSockets

CC rewards optimizer (RAG + rules)

Dec 2024 – Apr 2025
  • Effortlessly find the best credit card for any purchase in just three taps—no more missed rewards or guesswork!

RAG · Vector DBs

Education

BTech in IT – KJ Somaiya College of Engineering

2020 – 2024
Mumbai, India
  • CGPA: 8.9
  • Relevant Coursework: Data Structures, Algorithms, DBMS, Operating Systems, Computer Networks

Publications

Expense Management System – IEEE

2023