Full Stack Engineer — Flint Labs

The Bitcoin Street Journal; Flint (MI); Hybrid; USD 120,000 - 180,000; Full time

Benefits offered by this job

Fully remote

Job summary

Flint Labs is building a high-performance on-chain DEX on Solana. You will design and build across Flint’s full stack, from on-chain and backend systems to the frontend trading interface.

This is a high-ownership role with aggressive timelines; you will implement core exchange logic, wallet integrations, and real-time UI systems, while shaping the architecture from smart contracts to the frontend.

Qualifications

• 3+ years of professional software development experience.
• Comfortable across the stack: Rust for backend and on-chain systems, React and TypeScript for frontend.
• Experience building complex, data-intensive web applications.
• Strong backend fundamentals including APIs, distributed systems, and async systems.
• Experience with low-latency or performance-sensitive systems.
• Familiarity with DeFi, trading, or financial applications.
• Ownership mindset and comfort in an early-stage environment.
• Experience building trading interfaces or orderbook->
• Experience integrating Solana wallets and transaction flows in web apps.
• Solana runtime optimizations and CU profiling.
• Previous experience with matching engines, order books, prop AMMs, or execution systems.
• Familiarity with perpetuals, margin trading, funding mechanics, or ADL.
• Market-making or trading infrastructure experience.

Responsibilities

• Build core exchange logic: markets, users, collateral, fees, and order routing.
• Build the trading interface: order entry, positions, balances, charts, and real-time market data.
• Implement on-chain matching, margining, liquidation, and risk enforcement.
• Integrate Solana wallet flows and backend services into real-time UI systems.
• Help design the end-to-end architecture of the exchange, from smart contracts to the frontend.
• Implement low-latency data streaming and state management across the stack.
• Improve developer tooling and onboarding experience.
• 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.

Skills

Rust

React/TypeScript

Distributed systems

Low-latency

DeFi familiarity

Trading/finance experience

Ownership mindset

Tools

Solana wallets integration

Solana runtime optimizations

Matching engines

Job description

• Company: Flint Labs
• Location: Flint, MI, USA
• Sector: Blockchain
• Source: web3.career

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 across Flint’s full stack, from on-chain and backend systems to the frontend trading interface.

Responsibilities

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

Build the trading interface: order entry, positions, balances, charts, and real-time market data.

Implement on-chain matching, margining, liquidation, and risk enforcement.

Integrate Solana wallet flows and backend services into real-time UI systems.

Help design the end-to-end architecture of the exchange, from smart contracts to the frontend.

Implement low-latency data streaming and state management across the stack.

Improve developer tooling and onboarding experience.

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.

Requirements

3+ years of professional software development experience.

Comfortable working across the stack: Rust for backend and on-chain systems, React and TypeScript for frontend.

Experience building complex, data-intensive web applications.

Strong backend fundamentals including APIs, distributed systems, and async systems.

Experience with low-latency or performance-sensitive systems.

Familiarity with DeFi, trading, or financial applications.

Ownership mindset and comfort in an early-stage environment.

Experience building trading interfaces or orderbook->

Experience integrating Solana wallets and transaction flows in web apps.

Solana runtime optimizations and CU profiling.

Previous experience with matching engines, order books, prop AMMs, or execution systems.

Familiarity with perpetuals, margin trading, funding mechanics, or ADL.

Market-making or trading infrastructure experience.

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.