Client: Fullstack (10-person startup). Paraform: https://www.paraform.com/share/fullstack/cmrxxeiys00010djli430dsps Location: San Francisco office, onsite 5 days a week. Visa (hard filter): TN or H1B transfer only; NOT H1B in year 3 or year 6. Check visa status early. Level: Mid-level, 2–4 years, able to own critical systems early. Domain: crypto trading (perps, cross-chain spot, prediction markets); exchange/trading infra (CEX, DEX, Hyperliquid); HFT and market making; portfolio margin and collateral; blockchain protocols and validators (Rust L1/L2). • Production Rust (must) • Async programming with Tokio (must) • Low-latency, performance-focused backend (ms-level APIs) • Distributed systems, state consistency across async processes (voting, consensus, coordination) • REST and WebSocket APIs • Live market data, multi-venue coordination • Risk and liquidation engine logic • Blockchain state machines for trading and settlement • Docker Traits: performance/latency-driven, systems thinker, comfortable with startup pace and ownership.