Solidity Smart Contract Engineer

Job Description

Job DescriptionCareer Renew is recruiting for one of its clients a Solidity Smart Contract Engineer - this is a fully remote role for US based candidates.

We are an on-chain financial infrastructure company backed by leading VCs including Strobe Fund, CMT Digital, Metalayer VC, The Venture Dept, and Generative Ventures. We're upgrading financial markets through 24/7 instant settlement. Our first product is Multiliquid, an institutional-grade smart contract protocol that facilitates interoperability and liquidity across tokenized financial assets and stablecoins. Our mission is to bridge traditional finance (TradFi) assets and decentralised finance (DeFi) in a transparent, efficient, and highly scalable way, ultimately replatforming all of financial markets on 10x better infrastructure in the form of blockchain.

Role Overview

We're looking for a Smart Contract Developer to join our core engineering team. In this hands-on role, you'll design, develop, and deploy secure smart contracts that power the Multiliquid protocol. You'll architect on-chain logic, optimize gas efficiency, ensure security best practices, and build the foundational infrastructure that enables institutional-grade DeFi operations. This is an opportunity to shape the core protocol layer of institutional DeFi, building robust, auditable smart contracts that handle significant liquidity flows across multiple chains.

You will work on a small, rigorously selected, senior team of engineers. You will be responsible for collaborating closely with product, compliance, security auditors, and business stakeholders. This is a high-impact role requiring deep technical expertise in blockchain development, strong security mindset, strategic thinking, and a passion for delivering best-in-class DeFi solutions.

Key Responsibilities

Smart Contract Development

• Design, develop, test, and deploy secure smart contracts in Solidity for the Multiliquid protocol using Foundry.

• Implement complex DeFi primitives including liquidity pools, cross-chain bridges, access control mechanisms, and institutional-grade financial logic.

• Write clean, well-documented, gas-optimized code that adheres to industry best practices and established design patterns.

Protocol Architecture

• Architect scalable, modular smart contract systems that support evolving protocol requirements.

• Design upgradeable contract patterns and governance mechanisms for protocol evolution.

• Collaborate with the engineering team to define on-chain/off-chain boundaries and integration points.

Security & Auditing

• Conduct thorough internal security reviews and testing of smart contracts before deployment.

• Work closely with external auditors to address findings and implement recommended security improvements.

• Proactively identify and mitigate potential vulnerabilities, attack vectors, and edge cases.

• Stay current with emerging security threats and best practices in the DeFi ecosystem.

Testing & Quality Assurance

• Write comprehensive unit tests, integration tests, and fuzzing tests for all smart contract code.

• Develop test suites that cover edge cases, failure scenarios, and adversarial conditions.

• Participate in code reviews and provide constructive feedback to maintain high code quality standards.

Cross-Chain & Integration Work

• Implement cross-chain messaging protocols and bridge integrations to enable multi-chain liquidity flows.

• Collaborate with full-stack engineers to ensure seamless integration between smart contracts and front-end/back-end systems.

• Design and document contract interfaces (ABIs) that enable efficient off-chain interaction.

Hands-On Engineering

• Actively write and deploy smart contract code to mainnet and testnets.

• Lead the development of core protocol features and upgrades.

• Monitor deployed contracts, respond to on-chain events, and troubleshoot issues in production environments.

• Prototype, iterate, and optimize rapidly in a fast-moving environment.

Required Qualifications

Experience

• 3+ years of experience developing and deploying production-ready smart contracts in Solidity.

• Proven track record of shipping secure, battle-tested contracts that handle significant value.

• Experience with DeFi protocols (AMMs, lending protocols, yield aggregators, etc.) is highly preferred.

• Familiarity with cross-chain protocols and bridge architectures is a plus.

Technical Skills

• Expert-level proficiency in Solidity and deep understanding of the EVM.

• Strong knowledge of smart contract security best practices, common vulnerabilities (reentrancy, front-running, access control issues, etc.), and mitigation strategies.

• Proficiency with development frameworks such as Foundry and Hardhat.

• Experience with testing frameworks and tools (Foundry, Hardhat, Echidna, Slither, etc.).

• Familiarity with Web3 libraries (ethers.js, web3.js, viem) for contract interaction and testing.

• Understanding of gas optimization techniques and on-chain efficiency.

• Experience with upgrade patterns (proxy contracts, diamond pattern, etc.).

• Knowledge of other blockchain ecosystems (L2s, alternative L1s) is a plus.

• Familiarity with Rust or other systems programming languages is beneficial but not required.

Soft Skills

• Maniacal attention to detail and excellent ability to receive and internalize feedback.

• Clear communicator able to work with both technical and non-technical teams.

• Strong problem-solving abilities and comfort navigating complex systems.

• Adaptable and entrepreneurial mindset suited to early-stage environments.

• Desire to contribute professionally and personally as a member of a dynamic, collaborative, high-performing team.

Why Join Us?

• Impact: Help shape the user experience and interface of the future liquidity layer for tokenized finance.

• Innovation: Work on real-world blockchain integrations powering institutional-grade capital flows.

• Learning: Expand your understanding of DeFi, tokenized assets, and decentralized infrastructure.

• Team: Join a collaborative, mission-driven team backed by top investors.

Upside: Competitive salary, equity upside, and the chance to be an early builder of a transformative protocol.

Compensation & Package

Base Salary + Equity