I build fast, intelligent software for the web.

I'm Arvindh Kumar Kalainathan (a.k.a. Bolt), a CS student at UT Dallas and a full-stack developer who enjoys turning messy problems into clean products, from ML pipelines that predict pipeline failures to tools used by hundreds of students every semester.

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Portrait of Arvindh Kumar Kalainathan
1st Place EOG Resources · HackUTD XI

About

Arvindh presenting on stage

I'm a Computer Science student at The University of Texas at Dallas, originally from India. I'm drawn to how technology works under the hood, and to solving problems efficiently. (Being a little lazy turns out to be great motivation for writing good automation.)

I started with Java in high school, picked up Python and SQL, and taught myself web development after my first hackathon showed me what I didn't yet know. Since then I've built full-stack apps, a computer-vision mobile app, a Discord bot for an 800-member community, and AI/ML projects that have earned three hackathon awards, including first place at HackUTD.

Right now I'm most interested in applied machine learning and building products where a model is only one part of a well-engineered system. Since 2026, I've also been making games with Unity.

Languages

  • Python
  • JavaScript
  • Java
  • C++
  • C#
  • SQL
  • Dart
  • Racket
  • HTML/CSS

Frameworks & Tools

  • Flask
  • Flutter
  • Tailwind CSS
  • Chart.js
  • discord.py
  • Unity
  • Firebase
  • PostgreSQL

ML & Data

  • scikit-learn
  • Pandas
  • NumPy
  • YOLOv5
  • Google ML Kit
  • OpenAI API

Selected work

All repositories

More projects

Earlier builds, kept compact. Open any one for the full story.

    Power Tools

    Open-source utilities I build for myself first. If they save me clicks, they'll probably save yours, and the code is on GitHub.

    Arcform app icon

    Arcform

    File conversion, one right-click away.

    Arcform brings file conversion into the Windows right-click menu. Instead of uploading files to online converters, you right-click and choose what you need.

    • Convert Word ↔ PDF, iPhone HEIC photos, PNG / JPG / WEBP, and MOV / MKV / WEBM / AVI videos to MP4 or MP3.
    • Shrink to fit images and videos under 1, 10 or 25 MB, with a quality search for images and size-targeted two-pass encoding for video.
    • Copy as converts a file straight to the clipboard, ready to paste into chats and emails.
    • Merge PDFs from any folders with a merge queue and a drag-to-reorder editor.
    How it stays fast

    Selecting many files opens a single progress window: extra processes pass their files to the first one over a named pipe. Jobs run in parallel lanes matched to each tool's limits. Arcform also avoids slow work where it can, by keeping one copy of Word open for a whole batch and copying H.264 video into MP4 without re-encoding.

    • Python
    • Tkinter
    • Pillow
    • PyMuPDF
    • ffmpeg
    • Windows registry
    • COM (Word automation)
    View on GitHub Full demo (4 min)
    DownloadsSimulated in your browser

    Right-click a file to open the Arcform menu

    Games

    New in 2026

    In 2026 I started building games with Unity. On desktop, press start to play right here in your browser, no download needed.

    Player 1 · Ready Controls: W A S D

    Journey

    1. 2026

      Player one has entered the game

      Got into game development with Unity and C#, and released my first game, The King's Path, playable in the browser on itch.io. Also published Arcform, a right-click file converter for Windows, on GitHub.

    2. 2025

      Back on the podium, twice

      Took 3rd place in the AWS challenge at TAMUhack with Vision Learning, an AI interview coach, and 3rd place overall at the Axxess Hackathon with AIgnosis, a multi-model healthcare diagnostics app.

    3. 2024

      First hackathon win

      Built the Flask API and data pipeline for PipeBrains, which took 1st place in EOG Resources' challenge at HackUTD XI, the largest 24-hour hackathon in the US. Also built SafeDrive with ACM Projects and Zeus for my CS community.

    4. 2023

      Self-taught web development

      Learned HTML, CSS and JavaScript over the summer and shipped WebTrack, Recime and Lé Word. Built MedCare at HackUTD X, launched this site's first version, and joined ACM at UTD.

    5. 2022

      Databases, then UT Dallas

      Learned SQL and wired it up as a backend for Python apps. Started Computer Science at UT Dallas, built games in Unity/C# with the Student Game Developer Association, and attended my first HackUTD.

    6. 2021

      Python & academics

      Picked up Python quickly on top of Java. Earned perfect scores on the national board exams in Computer Science and Chemistry, and ranked 1st in Physics in my school.

    7. 2019

      Hello, world

      Wrote my first programs in Java in high school: loops, sorting algorithms and the fundamentals that started everything.

    Beyond code

    Let's build something.

    I'm open to internships, full-time roles and interesting collaborations. The fastest way to reach me is email.