Career Renew is recruiting for one of its clients a Senior Solidity Engineer - this is a fully remote role and candidates can be based in PST - CAT timezones.

We are on a mission to redefine capital markets infrastructure through cutting-edge on-chain derivatives and protocol architecture. We’re seeking a highly experienced Senior Solidity Engineer (or VP of Engineering , depending on seniority fit) to join our remote-first team. This is a pivotal leadership role within our smart contract engineering group, working alongside the Chief Protocol Officer, Engineering Manager, and cross-functional product leaders to build next- EVM-based DeFi infrastructure.

The team comes from established protocols, hedge funds, and market makers, and is backed by Polychain, Van Eck, Binance, Selini, Hashed, and others.

Key Responsibilities

Serve as one of the primary owners of Solidity development within a high-performing team of 6 smart contract engineers.

Architect, develop, and optimize secure, gas-efficient smart contracts powering Concrete’s DeFi protocol.

Contribute to protocol design, audits, and security reviews with deep technical ownership.

Collaborate with product and project managers to align technical deliverables with roadmap priorities.

Drive the evolution of Concrete’s on-chain architecture, with potential to scale across multiple chains.

Stay ahead of developments in the Ethereum ecosystem and contribute to open-source efforts as relevant.

Requirements

3–4+ years of professional experience writing secure Solidity smart contracts.

Proven engineering background within an EVM-based DeFi protocol .

Strong understanding of smart contract testing, deployment frameworks, and upgradeability patterns.

Familiar with Solidity optimization, gas cost analysis, and safe architectural practices.

Nice to haves

Experience with cross-chain architectures , L2s, and bridging protocols.

Technical familiarity with DeFi primitives such as vaults, lending markets, interest rate modeling, and asset management.

Prior leadership experience or desire to grow into a VP-level technical leadership role.

Why Join Concrete

Work with a tight-knit, world-class team shaping the future of decentralised derivatives.

Enjoy a fully remote culture with high trust, flexibility, and ownership.

Competitive compensation + unlimited PTO and other flexible benefits.

Compensation & Package

Competitive compensation + unlimited PTO and other flexible benefits.