Matthew Mage

Senior software engineer at Amazon, on the platform that calculates bills for AWS. Based in the Seattle area.

About

Senior SDE at Amazon, on AWS Billing, the platform that bills ~20 million AWS accounts. I'm tech lead on the compute-path rewrite (shipping mid-2026) and security lead for the org. A patching pipeline I built got 12,000+ hosts from 10% to 99% patched.

Before that I co-founded calculated.gg. We built Paragon, a Rocket League trainer; earlier we ran a replay-analysis site for tens of thousands of players. I owned the backend (GCP, then AWS Lambda and DynamoDB) and wrote most of the Python and Rust. The replay engine is open source: carball.

From 2019 to 2022 I consulted for Psyonix on the Rocket League Championship Series.

BS/MS in Mechatronics at Northeastern, 2020, with a stint at NASA Ames on satellite-reflectance ML in the middle. While at Northeastern I helped start the Esports Club, ran its tech, and was on the founding Rocket League roster when the team made varsity in 2020.

Outside of work I take photos, hike, cycle, ski, play Deadlock, and run the occasional D&D campaign.

Work

  1. –now Amazon · Senior SDE, AWS Billing platform Seattle Tech lead on the compute rewrite; security lead for the org.
  2. – Psyonix · Esports software consultant (RLCS) remote Tournament tooling in Rust, TypeScript, React, Python.
  3. – calculated.gg · Co-founder, lead backend remote Replay analysis for 30M+ games and 30k+ active players.
  4. – Northeastern University · M.S. Mechatronics Boston Founding member and tech director, Northeastern Esports.

Projects

  1. – Paragon · Rocket League training, one button at a time (sunset) A desktop trainer that dropped players into specific shots on demand.
  2. neuralcr.com · Challenge Ratings via neural net Estimates D&D 5e (2014) monster CR from stats and abilities.
  3. – calculated.gg · Rocket League replay analysis (archived) Stats and ML over 30M+ games for 30k+ active users; built on GCP.
  4. – carball · Open-source replay decompiler and analyzer (archived) Powered calculated.gg, Rival Esports, and others. Still on PyPI.

Elsewhere