FX Protocol Engineer (Go/Rust) - On-site SF + Equity

Crebit; San Francisco (CA); On-site; USD 240,000 - 290,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Vision insurance

Learning budget

Office lunch/dinner

Job summary

Crebit in San Francisco, CA is seeking a Protocol Engineer to build the off-chain protocol powering FX hedges and quote engines. You will design APIs for fintech customers, implement the matching logic and queueing primitives to ensure safe operation under load.

The role requires hands-on experience with production financial systems, invariant thinking, and familiarity with Solana RPC or Geth/Reth internals.

Qualifications

• You've built production financial systems - exchange, payments, or treasury infra.
• You read TLA+ for fun (or at least know when to reach for it).
• You think in invariants: this number should never go negative, here's why.
• You've worked with Solana RPC or Geth/Reth internals at some point.

Responsibilities

• Own the rate-lock state machine across quote / lock / settle / expire / refund.
• Build the liquidity matching layer that pairs hedge requests with our book.
• Ship Go or Rust services that hit p99 < 50ms on quote generation.
• Design the public REST + webhook API our fintech customers use.

Skills

Go

Rust

Distributed systems

APIs design

Tools

Solana RPC

Geth/Reth

Job description

Crebit in San Francisco, CA is seeking a Protocol Engineer to build the off-chain protocol powering FX hedges and quote engines. You will design APIs for fintech customers, implement the matching logic and queueing primitives to ensure safe operation under load.

The role requires hands-on experience with production financial systems, invariant thinking, and familiarity with Solana RPC or Geth/Reth internals.