Founding Engineer · Hobfit · Shark Tank India Season 5

Building products
people actually use.

Full-stack & mobile engineer with 3+ years shipping React Native, Node.js, and Next.js at scale. I've taken a women's fitness app from zero to national TV — and shipped viral developer tools along the way.

Open to US remoteFounding Engineer rolesReact NativeNext.jsNode.jsExpo

Years founding eng

Hobfit · zero to production

30k

Twitter impressions

Goofyy viral launch

Live products

Hobfit · Split It · Goofyy

Recent Writing

Things I've written recently.

Blog DSA System Design

April 7, 2026

Walking Robot Simulation II

DSA · Medium

April 7, 2026

How to Design a URL Shortener

System Design · 14 min read

April 6, 2026

Walking Robot Simulation

Robot Return to Origin

DSA · Easy

Recent Reading

Blogs I've read recently.

Open reading shelf

April 3, 2026

Designing Google Maps

Medium · Jyoti

April 2, 2026

Bloom Filters Explained

System Design

April 1, 2026

The Microsoft-OpenAI Divorce Is Official: Inside the $250 Billion Betrayal

Medium · Somya Golchha

Work & Projects

🎬 Shark Tank India · Season 5

Hobfit — Built the tech.

Women's fitness & wellness app. I joined as the first engineer and built the entire technical foundation — mobile app, backend, and web platform.

Watch the full pitch on Sony LIV

Website App Store Play Store

The build story

Joined as Founding Engineer when Hobfit was an idea. Built the React Native app from scratch, designed a Firestore-backed architecture, set up the Vercel/Next.js web presence, and implemented women-centric features — workout tracking, nutrition logging, community. When the founders pitched on Shark Tank India Season 5, I had the entire tech stack running live.

PlatformiOS & Android

RoleFounding Engineer

Featured onShark Tank India S5

React NativeExpoExpress.jsFirestoreNext.jsVercelApp StorePlay Store

🎵

Goofyy

Viral · 30k impressions

Play music directly in your terminal. No GUI, no sign-in — just one command. Blew up on Twitter when developers started sharing their terminal sessions.

npm ↗GitHub

$ npx goofyy "song name"

What developers are saying

🎧 Just got Goofyy Music Player running in my Windows terminal!
Now playing tracks right from the CLI - no GUI needed. 😎
Built with Node.js and smooth as butter.
Shoutout to the devs! 💻🎶 and @Himanshu_Saiini pic.twitter.com/GRJAJyhvZB
— Urvashi (@UraViva_) July 20, 2025

Listen to songs directly from your terminal and flex in front of your friends.
Built by @Himanshu_Saiini pic.twitter.com/tiu5XGUjmx
— Arpit Neewaliya (@arpitneewaliya) July 23, 2025

this is very cool, well done pic.twitter.com/CobSG3sNzY
— tully (@tullycore) July 23, 2025

Hello nerds
Now you can play music directly in your terminal

Just do

npx goofyy song_name

Thank me later ❤️ pic.twitter.com/qzY0RZVHJO
— himanshu (@Himanshu_Saiini) July 19, 2025

💸

Split It

Split expenses with friends — no account needed. Calculate and export in seconds. Live on Android with a growing user base.

No sign-up required, instant expense splitting

Export breakdown as PDF or share link

Available on Google Play Store

split-it.xyz ↗Play Store ↗

React NativeExpoNext.js

Achievements

1st Position

Hacked Hackathon

BML Munjal University

Won among 50+ teams with a solution strong enough to stand out in both product thinking and execution.

1st Position

Capture The Flag

Tech Aarambh by GeeksForGeeks

Placed first in a competitive security challenge that tested practical problem-solving under pressure.

Experience

Two chapters. One clear arc.

I've worked across exactly two teams so far, which makes the story easier to tell: I learned how to ship inside a company, then stepped into building a startup from the ground up.

Shark Tank India Season 5

Hobfit

Founding EngineerFeb 2023 - Present

Main chapter

Joined as the first engineer and built the technical foundation across mobile, backend, and web while the company evolved from idea to a live consumer product.

Tenure

3+ years

Ownership

App, backend, web

Moment

Idea to national TV

What I owned

Built the React Native app from scratch and shipped the core consumer experience.
Set up backend architecture and product foundations for workouts, nutrition, and community.
Owned fast product iteration closely with founders during the company’s early-stage growth.

Stack

React NativeExpoNode.jsFirestoreNext.jsVercel

College internship

Unlock Velocity

Software Engineering Intern8 months

Worked as an intern during college, contributing to real product work while sharpening execution, communication, and product thinking in a professional team.

Contributed to production-facing work in a fast-paced engineering environment.
Learned how to ship within existing systems and collaborate inside a team workflow.
Built the foundation that prepared me for a broader founding-engineer role later on.

FrontendProduct thinkingExecutionTeam collaboration

Testimonials

Lakshay Rohilla

CTO, Hobfit

“

Himanshu has been a huge part of Hobfit’s journey. He built an excellent mobile app and platform foundation for us, moved fast with real ownership, and consistently turned product ideas into shipped reality. Seeing Hobfit reach Shark Tank India with such a strong tech backbone in place says a lot about the quality of his work.

Lalit Fauzdar

CTO, Unlock Velocity

“

Even as an intern, Himanshu stood out as exceptional. He brought seriousness, curiosity, and the kind of execution you normally expect from someone much further along in their career. He was the kind of person you notice early, and I sincerely hope he keeps doing exceptional things wherever he goes next.

317

Total solved

Current streak

Active days