About the role
We're looking for a
Backend Systems Engineer
to join
Fullstack
.
Fullstack Trade
is building the only unified front-end trading app for retail crypto – perps, cross-chain spot, and prediction markets under one portfolio margin balance. No bridging, no fragmentation. Founded by Flood, creator of Insilico Terminal ($900B CEX volume, 90% market share), and Robin, operated a leading CEX and on-chain HFT firm. Launching Jan/Feb 2027.
You will
Build risk and liquidation engines that manage risk and capital efficiency in volatile markets.
Design blockchain state machines powering trading, settlement, and risk operations.
Build consensus and coordination services that keep state consistent across async processes.
Process live market data: WebSocket streams and time-sensitive workflows across trading venues.
Ship high-performance REST and WebSocket APIs with millisecond-level response times.
Requirements
2–4 years of backend experience with production Rust.
Real-time, high-throughput backend services (systems-level, not pipeline work).
Async programming with Tokio.
Relational, time-series, and key-value databases.
Startup or VC-backed company experience.
Active public GitHub with Rust or C projects outside of work.
Genuine passion for trading: you actively trade perps or prediction markets, run trading bots, or build on-chain.
US work authorization: TN and H1B transfers supported (not in year 3 or 6), no OPT/F1.
On-site 5 days/week in NYC or SF.
Stack
Rust, Tokio, distributed systems, blockchain, REST APIs, WebSockets, Docker.
Nice to have
Fintech, crypto, or HFT background.
Low-latency or trading systems experience.
We offer
Up to $300k/year salary + equity.
Small team of builders, direct work with the founders.
NYC office or SF hacker house and Paradigm offices.