Puranjay Kumar
Maths and data science, LSE. This is a game. The CV is one click away.
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Everything on this page unlocks as you go. If you would rather not, there is a link in the corner.

Holdings0 of 6 hired
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About10 cheese

Second-year BSc Mathematics with Data Science at LSE. I build things and then measure whether they worked, usually in that order.

Projects60 cheese

Moving-average crossover backtest

Ten years of SPY against a buy-and-hold benchmark, with realistic transaction costs and a one-day signal lag. It reduced drawdown and lost to doing nothing once the costs were counted. Published as it came out. Code

Market risk-return dashboard

Return, volatility, correlation structure and maximum drawdown across four asset classes. Halfway through I found every Sharpe ratio was wrong, because I had implicitly treated the risk-free rate as zero. Code

Games200 cheese

Rats vs Cheese

Built solo in ten days. Persistent player economy, rebirth mechanics, server-authoritative state and a payments layer. Balancing the economy took longer than writing it. Play

My Runway

Second of three shipped over one summer. Play

Build a Wizard Army

Built in a single night, which is either impressive or a warning. Play

CV and contact500 cheese

A-Levels at 16 alongside GCSEs. Founded a tutoring agency at 14 and ran it to roughly fifty students before starting at LSE.

CV Puranjay1010@gmail.com LinkedIn GitHub
Everything else1,200 cheese

I built a portfolio holding equities, technology, long-dated bonds and gold, expecting four positions. The correlation matrix showed something closer to two. Bonds and gold were moving together because both were priced off real rates, so the diversification I thought I had bought was conditional on a rate regime rather than structural. Most portfolios are fewer bets than they look.

  • 01Six foot.
  • 02250 kg calf raise.
  • 03Sat three A-Levels at sixteen, alongside my GCSEs.
  • 04Read Lord of the Rings early enough that it did most of the damage.
  • 05Taught myself Luau in a week and shipped three games with it.
  • 06Drank eighty-odd Monsters in first year. Fully intend to beat it in second.
The unlock curve was balanced by the same person who balanced Rats vs Cheese. Proceed accordingly.