Location: Brazil (UTC-3) Remote: Yes (remote only, US timezone overlap) Willing to relocate: No Technologies: Rust (Tokio, Axum, Tonic, WASM),Node.js/NestJS/TypeScript, React, PostgreSQL, Redis, RabbitMQ, Docker, AWS/GCP, zk-SNARKs Résumé/CV: https://www.ovasylenko.com Email: hello@ovasylenko.com

Backend & systems engineer, 18+ years. Two recent builds: Rust — Solo-built Orch8 (orch8.io), a durable workflow orchestration engine. 2,400+ instances/sec, <3ms latency. 7 crates, 3 SDKs (Node/Python/Go), 200+ integrations, built-in LLM tool calling and ReAct agent loops.

Node.js/NestJS — Matching engine for a crypto exchange processing 4,000+ orders/sec with sub-millisecond latency. Liquidity bots, candle engine, real-time WebSocket trading.

Also: zk-SNARK wallet engine at Panther Protocol (cross-chain, UTXO model), micro-frontend migration at PropertyGuru (4 product teams). Led 15 engineers across 3 time zones.

Looking for: Senior/Staff Rust systems, backend architecture (Node.js or Rust), Web3/protocol engineering, or AI infrastructure roles. I care about product ownership and shipping - not process theater.