Sagar Kharal avatar

Hi, I'm Sagar.

Full-stack developer · India

Open to opportunities

India · Remote
Checking latest work…

About

~/about
  • I'm a 22-year-old engineer currently shipping code at HFlow, a YC-backed robotics data platform.
  • In my first public week at HFlow, I merged 12 PRs, including a LeRobot to MCAP converter and a silent NumPy data-corruption fix that passed unnoticed by the test suite.
  • HFlow co-founder Kingston Kuan (YC S26) worked closely with me on those contributions and is happy to vouch for my engineering work as a reference.
  • During my summer Full-Stack Development internship, I built a client-facing website from scratch, owning major features from requirements through pixel-perfect React and Tailwind implementation.
  • I built a Land Purchase Risk Assessment project for Mireye's Co-founder & CTO, Shashwat Kapoor, who called it “excellent work” and praised the architecture and product thinking.
  • I researched and published a hybrid AI resume-screening pipeline using Sentence-BERT and Phi-3.5, evaluated across 8,000 resume-JD pairs.
  • I also drove a 4-person team from data collection and experimentation through the final publication.

Writing

~/writing

Aug 23, 2026 · Case study

One Week, Two Silent Data-Corruption Bugs: A Field Guide From HFlow

Two silent bugs erased training data in HFlow without a single error. Wrote up how each works and how I fixed them.

Projects

~/projects
  • hflow logo

    hflow

    Open source · 12 PRs merged08.2026–now

    Physical AI data platform (YC S26). Live PR count and recent work shown on the home page; the latest merged PRs are listed at /work. Highlights from the repo's first public week: LeRobot to MCAP converter, stress framework, and two silent data fixes (#127, #133) proved with repros.

    • Python
    • MCAP
    • FFmpeg
    • DuckDB

  • Repatch

    05.2026–now

    Autonomous agent that fixes GitHub issues end to end: it reproduces the bug first, writes the failing test before the fix, verifies in a sandbox, then opens the PR.

    • TypeScript
    • LLM agents
    • Docker

  • groundedness-engine

    07.2026–now

    npm library that catches AI hallucinations with four deterministic checks. Zero model calls.

    • TypeScript
    • npm
    • Zero-LLM
All 8 projects ?

Experience

~/experience
  • Hebbian Robotics logo

    Hebbian RoboticsYC S26

    08.2026–now

    Open Source Contributor · Remote

    • Merged 12 PRs to HFlow, the company's open-source Physical AI data platform (YC S26), during the repo's first public week (Aug 2026). The latest merged PRs are listed at /work.
    • Shipped a LeRobot→MCAP converter passing strict format conformance checks, and a reproducible stress-testing framework adopted as the repo's benchmarking standard.
    • Fixed two silent data-corruption bugs (#127, #133): one discovered by auditing the catalog boundary, one reported by the co-founder. Both proved with repro scripts before fixing.
    • Reference available from the maintainer on request.
    • Python
    • MCAP
    • FFmpeg
    • DuckDB

  • XpertStim IT Services Pvt. Ltd.

    06.2025–08.2025

    MERN Stack Development Intern · Remote

    • Built the internship's flagship client website from scratch: fully responsive, animation-rich, and built for engagement.
    • Owned major parts of the project independently, taking requirements to pixel-perfect implementation with React.js and Tailwind CSS.
    • Worked in real-time collaboration with the team to meet client expectations and keep the product visually consistent with the brand.
    • React.js
    • Tailwind CSS
    • UI/UX
Full experience ?

Currently

~/now

Checking latest work…

Contributing to HFlow (YC S26): 12 PRs merged during the repo's first public week (Aug 2026), now focused on catalog integrity and repro-driven fixes.

Building agent tooling that tests itself before shipping, and open source that others can verify.

Open to full-time roles and contract work · Remote · IST

Contact

~/contact

I'm open to full-time roles and contract work. The fastest way to reach me is email. I reply fast.

sagarkharal024@gmail.com