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.

Quantitative Developer