Nexus
May 2026 — present
Backend / Systems Engineer
Rust systems for trading risk and the market-listing lifecycle at a San Francisco–based verifiable spot and perpetual-futures exchange.
- Built runtime market-listing requests, readiness checks, scheduled activation, durable replay, and no-write previews.
- Implemented atomic pre-trade margin reservations and position-aware checks to prevent order overcommit.
- Recovered 15–31% throughput by optimizing lock acquisition.
- Hardened mark-price oracles using volume-weighted trade blending and snapshot-restore validation.
- Built per-domain lock-wait metrics and TTL-cached admin endpoints, with 76× faster responses on cache hits.
