Alex Ashworth.

Rust contributor to clonk-rs, an open-source rebuild of a 2D destructible-world game engine: 172 pull requests merged in eight weeks across 1,588 files.

Cut lobby join time from 9.0s to 0.47s by admitting hosts before exact resource packing, and 20ms/frame by caching the sky instead of relighting it per frame. Removed quadratic object resolution from mouse picking.

Work split 114 bug fixes, 21 performance changes, 14 test changes across the renderer, network layer, and script compiler.

Sole engineer on an AI travel-planning SaaS. Split the system into a Next.js application and a research worker so multi-minute jobs ran off the request path.

Drove research with a ReAct loop under a per-job token budget, and enforced citations in code so uncited claims never reached an itinerary. BullMQ and Redis queues, PostgreSQL.

Launched publicly with paying subscribers on Stripe billing; the company wound down in March 2026. 88 tests, weighted toward authentication and rate limiting.

Built an ask-your-data chat interface over customer databases with one other engineer. Implemented M-Schema to give the model an accurate view of database layout.

Built the evaluation harness: commenting !eval on a pull request benchmarked its prompt or model against the deployed baseline for accuracy against a direct-SQL reference, consistency, and instruction following.

Replaced 1-2 hours of manual spreadsheet enrichment per dataset with a 10-second asynchronous pipeline, no human in the loop. Cut Snowflake spend over 50% through auto-suspend tuning and warehouse right-sizing. Sustained a 10,000-user load test.