Senior Engineer, v4 Hooks

Blockchain Education Network (BEN)

full-time

Posted on: 9/18/2025

Origin: • 🇺🇸 United States

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Senior

FlashSolidity

About the role

Bring product thinking for market‑tailored hooks: ideate and incubate high‑leverage ideas across market segments and translate insights into concrete hook specs with adoption and measurement plans.
Architect & ship hooks: own full lifecycle from whiteboard to audited mainnet deployment (fee dynamics, liquidity management, MEV/LVR capture, KYC/attestations, JIT, etc.).
Author canonical patterns: publish reference implementations, hook templates, and living specs for safe extensibility.
Design with distribution in mind: co‑create adoption plans with DeFi protocols, aggregators/routers, intent layers, and asset issuers; ship adapters, simulators, and SDK glue.
Own security & correctness: threat model hooks, define invariants, fuzz and formally verify critical paths, and partner with external auditors.
Data & feedback loops: instrument events/metrics, build Dune/Flipside dashboards, and run controlled experiments to tune parameters based on observed flow, MEV, and LP PnL.
Typical week: ideate and implement hooks targeting $100k+ trades, design reusable abstractions, pair program with external teams, write Foundry tests and fuzzers, optimize gas, and coordinate with aggregators on integration.

3+ years smart‑contract engineering, with 2+ years shipping production DeFi at protocol teams (DEX, lending, perps, bridges, market making infrastructure, oracles).
Deep Solidity + EVM internals; strong with Foundry, fuzzing, property tests; comfort reading/implementing community smart contracts.
Knowledge of the most common security pitfalls
Deep and practical understanding of Uniswap v4 architecture (PoolManager, Hooks, singleton design, state scoping, callback surfaces).
Practical understanding of Uniswap v3 concentrated liquidity model
Strong understanding of liquidity routing infrastructure - aggregators, routers, and solvers
Demonstrated product sense in DeFi: able to reason about incentives, MEV, LP/trader UX, and distribution realities.
A portfolio of shipped, battle‑tested contracts and public design docs, posts, or talks.
Nice‑to‑have: Shipped a v4 hook on mainnet with end‑to‑end readiness; emphasis on scalable and organized testing suites and test-driven design practices.
Application prompts: include a hook idea you’d ship in the next 12 weeks and a link to a deployed DeFi contract & Github from a previous project.