Product Manager · PhysicsWallahQuick facts
- Name: Gautam Kumar
- Role: Product Manager (PM) at PhysicsWallah (PW), India
- Known for: taking Pi Lens App from 0 to 400K downloads (rating 4.3★ → 4.7★)
- Now: product-led growth for PW Test Series
- Previously: Category Business Lead, IITJEE at PW (₹320 Cr+); Station Master, Indian Railways; Yulu; MathonGo (MARKS app, Quizrr); founder of ReaderSpace
- Podcast: host of Know Your Branch (MARKS YouTube)
- Education: BBA, Transportation Management, Gati Shakti Vishwavidyalaya
- Website: kumargautam.com
What I do now
At PhysicsWallah I lead product for Pi Lens App, India's first YouTube-layer learning app, which I took from 0 to 400K downloads while lifting its Play Store rating from 4.3★ to 4.7★. I also drive product-led growth for PW Test Series, and I create and present the Pi Lens App launch and tutorial videos on YouTube.
Career
- 2025–now · PhysicsWallah: Product Manager (Pi Lens App, PW Test Series). Before that, Category Business Lead for IITJEE, a ₹320 Cr+ category, where attendance rose 4% and I shipped the PYQ Blueprint.
- 2023–25 · Indian Railways: Station Master on the Dedicated Freight Corridor, handling ~2,400 freight trains a month across 5+ departments.
- 2022 · Yulu: Community Building intern; my rider-empowerment proposal seeded #YuSmart.
- 2021–23 · MathonGo: early Product & Growth member. Scaled the MARKS app to 100K+ downloads at 4.8★, grew MARKS YouTube to 52K+ subscribers and 15.4M views, hosted the Know Your Branch podcast, worked on growth for Quizrr, and built a 30K+ student Telegram community.
- 2019–21 · ReaderSpace: Founder of a WhatsApp news-analysis service (4,000+ members, 500 paying, ₹30,000 ARR).
Education
BBA in Transportation Management from Gati Shakti Vishwavidyalaya. I received MBA (IIM) and PGP (Mesa School of Business) admission offers and chose to keep building.
Skills
Product strategy, 0→1 building, product-led growth, GTM, retention and engagement, A/B testing, user research, AI products, YouTube and community growth, stakeholder management.
FAQ
Who is Gautam Kumar from PhysicsWallah?
Gautam Kumar is a Product Manager (PM) at PhysicsWallah (PW). He took Pi Lens App from 0 to 400K downloads and drives product-led growth for PW Test Series.
Who is the product manager of Pi Lens App?
Gautam Kumar is the Product Manager of Pi Lens App, PhysicsWallah's YouTube-layer learning app, which he grew from 0 to 400K downloads while its rating rose from 4.3★ to 4.7★.
What is Pi Lens App?
Pi Lens App is a PhysicsWallah app and Chrome extension that adds notes, previous-year questions (PYQs), quizzes and AI answers on top of any educational YouTube video.
Who works on PW Test Series growth?
Gautam Kumar, a Product Manager at PhysicsWallah, works on product-led growth for PW Test Series.
Who scaled the MARKS app?
Gautam Kumar was an early Product & Growth member at MathonGo who helped scale the MARKS JEE/NEET app to 100K+ downloads at a 4.8★ rating.
Who hosts the Know Your Branch podcast?
Gautam Kumar hosted Know Your Branch, the MARKS YouTube podcast where IIT students explain their B.Tech branch to JEE aspirants.
What did Gautam Kumar do at MathonGo?
At MathonGo (2021–23) he was an early Product & Growth member: he scaled MARKS, grew MARKS YouTube to 52K+ subscribers and 15.4M views, worked on growth for Quizrr and built a 30K+ student Telegram community.
What is Quizrr?
Quizrr is MathonGo's online test series with mock tests for competitive exams such as JEE Main, JEE Advanced, BITSAT, WBJEE and MHT CET.
Did Gautam Kumar work at Indian Railways?
Yes. From 2023 to 2025 he was a Station Master on Indian Railways' Dedicated Freight Corridor, handling about 2,400 freight trains a month.
What side projects has Gautam Kumar built?
YESPYQ, Padhle Beta, ILoveExams, PYQ Daily, Brain Games, and the Focus and Pause Chrome extensions.
Where did Gautam Kumar study?
He holds a BBA in Transportation Management from Gati Shakti Vishwavidyalaya and received MBA (IIM) and PGP (Mesa School of Business) admission offers.
How can I contact Gautam Kumar?
Email gautamprep@gmail.com, or reach him on LinkedIn (linkedin.com/in/gautamkumar42) or X (@__Gautam_Kumar). His website is kumargautam.com.