About Flow Foundation

Flow is a layer one blockchain designed from the ground up as a platform for a new generation of Web3 apps, games, and the digital assets that power them. Flow is home today to millions of users and apps from top tier creators including Genies, Cryptoys, Doodles, and Dapper Labs (NBA, NFL, Disney) as well as industry leaders such as Mattel (Barbie, Hot Wheels), LiveNation / Ticketmaster, and many more. Our mission is to take Web3 mainstream by making blockchain technology simple, safe, and delightful for builders and consumers alike. We operate as a distributed, low-hierarchy organization where humble, inquisitive entrepreneurs thrive.

Why this role matters

Total value locked (TVL) on Flow is growing quickly, and DeFi is a critical catalyst. As a DeFi Engineer you will drive the next wave of decentralized-finance innovation on Flow—shipping novel protocols, strengthening existing integrations, and inspiring builders across the ecosystem. You’ll pair deep DeFi expertise with Flow-native super-powers such as protocol-level account abstraction, Cadence’s capability-based security model, and seamless EVM equivalence to unlock experiences impossible elsewhere.

What you’ll do

Build & ship DeFi primitives – Design, implement, and audit smart contracts for AMMs, lending markets, liquid staking, cross-chain bridges, yield strategies, and novel financial instruments.
Expand DeFi partnerships – Collaborate with leading Web3 teams to port or co-create protocols on Flow, guiding them through architecture, security, and launch.
Level-up existing protocols – Profile on-chain activity, identify UX or economic friction points, and deploy improvements that increase capital efficiency and TVL.
Prototype future-state concepts – Explore account abstraction–enabled UX (e.g., gasless transactions, passkeys) and multi-VM composability to invent the next generation of DeFi experiences.
Advocate & educate – Publish reference implementations, write deep-dive blog posts, speak at conferences, and mentor community devs to demystify DeFi on Flow.
Security first – Own end-to-end security: formal verification, fuzzing, audits, monitoring, and rapid incident response.

About you

Software engineering experience focused on Web3/DeFi (Solidity, Move, Cadence, Rust, etc.).
Hands-on experience shipping and maintaining at least one major DeFi protocol (AMM, lending, bridge, LST, derivatives, etc.) to mainnet.
Strong grasp of smart-contract security patterns, economic/game-theoretic exploits, and incident triage.
Comfort working across the stack: writing Cadence contracts, scripting deployments, instrumenting on-chain analytics, and contributing to dApp front-ends.
Curiosity for emerging primitives (restaking, intent-based execution, L2 interoperability) and the creativity to adapt them to Flow’s architecture.
Effective communicator who can translate complex technical ideas to diverse stakeholders.
Bonus: experience with account-abstraction wallets, formal verification tools, or multi-VM execution environments.

What we’ll accomplish together

Double the number of high-quality DeFi protocols live on Flow.
10× TVL growth through improved capital efficiency and seamless cross-chain liquidity.
Set new UX/security standards for consumer-friendly DeFi using Flow’s unique capabilities.
Foster a vibrant community of external DeFi builders and researchers.

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DeFi Engineer