Competitive programming platform based on DMOJ

• Supports a dozen different programming languages.
• Platform used for the Rosario Programming Tournament.
• Gracefully load-balances heavy code-execution tasks to a variable number of workers through a VPN.

Encrypted expense splitting app

• Zero-trust security model where the server only sees ciphertext.
• Computes a minimal set of transactions needed to settle debts.
• Renders a graph visualizing the flow of money and pending settlements.