Kshitij JhunjhunwalaWork

iii. Work

ProfitLabs

A prediction markets terminal for Polymarket and Kalshi. Built solo in seven weeks, wound down June 2026.

Numbers

  • $120M+ daily volume tracked
  • 5,000+ monthly users, 40%+ day-7 retention
  • 500K+ markets matched into 6,900+ pairs across both exchanges

What it did

  • Arbitrage scanner: same contract on both exchanges, profit after fees
  • Whale tracker: every $1K+ trade, live
  • Wallet profiles: 33,000+ wallets with full trade history
  • Telegram alerts: ended up mattering more than the dashboard

The hard part

  • Deciding two contracts are the same contract. Different wording, different rules, different expiry
  • Heuristics to narrow candidates, then a model reading both sets of resolution terms. Under 1% false matches

Didn’t build

  • Trade execution. No custody, no regulation, shipped in weeks

Screens

3 min walkthrough, May 2026
The arbitrage scanner, listing matched contracts with Polymarket and Kalshi prices, profit and return side by side.
Arbitrage scanner
The dashboard, showing whale activity with trade sizes, a live whale feed, a watchlist, and markets expiring soon.
Whale activity and the live feed
A single market view comparing the same contract priced on Polymarket and Kalshi, with order book and price history.
One contract, both exchanges

Next.js, React, Python, FastAPI, WebSockets, Supabase, Claude API, Docker, GCP