Rust Web3 Jobs in United States

Flint Labs is building a high-performance on-chain DEX on Solana.

Recently, we shipped our first product: a plug-and-quote path into Solana's order flow, the highest-volume, most active in DeFi. Makers bring their pricing and risk logic; Flint handles the rest.

The production MVPs for spot, borrow/lend and perps are underway, and early team members will define core architecture and protocol design.

The company is fully backed by Ergonia, a crypto-native market-making firm with deep experience trading and building on Solana.

We are starting from a deliberately minimal core and iterating rapidly toward a full-featured mainnet exchange. This is a high-ownership role building production systems under aggressive timelines.

About the role

• You will design and build the quantitative models and risk systems that power Flint's exchange, from margin and liquidation engines to pricing, funding, and matching mechanics.

Responsibilities

• Build core exchange logic: markets, users, collateral, fees, and order routing.

• Design and implement margin, collateral, and liquidation risk models across spot margin and perps.

• Develop simulation and backtesting tools to stress-test core exchange logic, features, and risk parameters before they ship.

• Model and tune protocol-level parameters.

• Analyze market data and on-chain activity to validate model performance and identify risk exposure.

• Optimize systems for latency, throughput, and compute efficiency.

• Write thorough tests and maintain clear, living documentation.

• Own features end to end, from design to production.

• Assist with developer tooling, backend, and frontend where necessary.

Requirements

• 3+ years of experience in quantitative development, trading systems, or financial engineering.

• Strong grounding in probability, statistics, and financial modeling.

• Proficiency in Python or similar for research, with comfort in or willingness to learn Rust for production systems.

• Experience building or working with margin, liquidation, or risk engines in trading or DeFi systems.

• Strong backend fundamentals, comfortable moving from research code to production systems.

• Experience with low-latency or performance-sensitive systems.

• Ownership mindset and comfort in an early-stage environment.

• Strong English communication skills.

Bonus points

• Experience with on-chain systems or Solana development.

• Background in market making, prop trading, or quant research at a trading firm.

• Experience with exchange design, including risk and margin systems.

• Familiarity with AMM design, matching engines, or order book microstructure.

• Experience with simulation or backtesting frameworks.

What we offer

• No bureaucracy, just fast shipping and real impact.

• High ownership and real impact from day one.

• Competitive base plus meaningful token/equity upside aligned with long-term protocol success.

• Fully remote.

• IRL meetups and company offsites.