SAZ System is hiring a

Web3 Solidity Engineer

Job Title – Solidity Engineer

Location:Remote (PST Time Preferred, So please look for people in California or close

to CA)

Team:Engineering – Smart Contracts

About the Role

Concrete is on a mission to redefine capital markets infrastructure through cutting-edge

on-chain derivatives and protocol architecture. We’re seeking a highly

experiencedSenior Solidity Engineer(orVP 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-generation 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 anEVM-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 withcross-chain architectures, L2s, and bridging protocols.

· Technical familiarity withDeFi primitivessuch 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 PTOand other flexible benefits.

Compensation & Package

Competitive compensation+unlimited PTOand other flexible benefits.

Interview Process

1.Founder / CEO Interview

2. Hiring Manager Interview

3. Final Interview

Hiring Criteria

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

Familiarity with Solidity optimisation, gas cost analysis, and safe architectural practices.

Proven engineering background within an EVM-based DeFi protocol.

Strong understanding of smart contract testing, deployment frameworks, and

upgradeability patterns.

Experience with cross-chain architectures, L2s, and bridging protocols is a nice to have.

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

Apply Now: