Protocol Engineer — FX Hedging & Low-Latency Go/Rust

Crebit Pay, Inc.; San Francisco (CA); On-site; USD 225,000 - 275,000; Full time

Benefits offered by this job

Equity

Learning budget

SF office

Health benefits

Job summary

Crebit Pay, Inc. is building the off-chain protocol powering FX hedges for fintechs, neobanks, and consumers. You will own the rate-lock state machine across quote, lock, settle, expire, and refund, and ship Go or Rust services with blazing performance.

You will design public REST and webhook APIs for fintech customers, build the liquidity matching layer, and ensure p99 < 50ms quote generation under load in our SF office.

Qualifications

• Experience building production financial systems (exchanges, payments, or treasury infra).
• Familiar with invariants and correctness reasoning.
• Experience with Solana RPC or Geth/Reth internals.
• Proficient in Go or Rust for backend services.

Responsibilities

• Own the rate-lock state machine across quote, lock, settle, expire, and refund.
• Build the liquidity matching layer for hedge requests and the order book.
• Ship Go or Rust services achieving p99 < 50ms for quotes.
• Design public REST and webhook APIs for fintech customers.

Skills

Production financial systems

Solana RPC / Geth / Reth

Invariant thinking

Go or Rust development

API design

Tools

Solana RPC

Geth/Reth internals

REST APIs

Job description

Crebit Pay, Inc. is building the off-chain protocol powering FX hedges for fintechs, neobanks, and consumers. You will own the rate-lock state machine across quote, lock, settle, expire, and refund, and ship Go or Rust services with blazing performance.

You will design public REST and webhook APIs for fintech customers, build the liquidity matching layer, and ensure p99 < 50ms quote generation under load in our SF office.