Location: Brazil (UTC-3). Can work in European timezones too Remote: Yes Relocate: No Tech: Nest, Node.js/TypeScript, React, PostgreSQL, AWS/GCP, Rust Backend/system engineer, 18+ years of commercial development. Available to start immediately

Recent: g6k-rs — Rust lattice reduction (LLL/BKZ/sieving, CPU/Metal GPU); Orch8 — Rust durable workflow/AI engine, 2,400+ instances/sec; crypto exchange — matching engine, 4,000+ orders/sec, sub-ms latency.

Looking for: Backend/Systems/FullStack/Tech Lead — Node.js, React, Rust, Web3/crypto, AI infrastructure. Full-time or B2B.

CV: https://www.ovasylenko.com | [email protected]