Senior Smart Contract Engineer

Placements24; Sandton; Hybrid; ZAR 900,000 - 1,300,000; Full time

Job summary

Placements24 seeks a Senior Smart Contract Engineer to lead the design and development of secure contracts for decentralized applications. This role is remote with ties to Sandton, requiring deep blockchain knowledge and expert Solidity/EVM experience.

You will conduct security audits, optimize gas usage, and mentor junior engineers while collaborating with product and frontend teams to define contract specifications.

Qualifications

• 5+ years in software development, with at least 3 years in smart contracts.
• Expert-level Solidity and Ethereum Virtual Machine experience.
• Strong understanding of cryptography and secure DApp architecture.

Responsibilities

• Design, develop, test, and deploy complex smart contracts on multiple platforms.
• Write high-quality, secure code in Solidity, Vyper, or Rust where applicable.
• Conduct security reviews and vulnerability assessments of contracts.
• Collaborate with product managers, front-end developers, and stakeholders to define contract specs.
• Optimize contract performance and gas efficiency.
• Mentor junior engineers and contribute to team best practices in Sandton.

Skills

Solidity

EVM

Blockchain fundamentals

Testing frameworks

Security analysis

Layer 2

Education

Bachelor's degree in Computer Science or Engineering

Tools

Hardhat

Truffle

Job description

About the Role

Our client is seeking a seasoned Senior Smart Contract Engineer to lead the design and development of secure and efficient smart contracts, working remotely with ties to Sandton . You will play a critical role in building the core logic for our decentralized applications, ensuring the integrity and reliability of our blockchain-based products. This position requires a deep understanding of blockchain technology, extensive experience with smart contract languages like Solidity, and a passion for creating robust, secure, and innovative solutions in the rapidly evolving crypto and blockchain space.

Key Responsibilities

• Design, develop, test, and deploy complex smart contracts on various blockchain platforms.
• Write high-quality, secure, and efficient code in languages such as Solidity, Vyper, or Rust.
• Conduct thorough code reviews, security audits, and vulnerability assessments of smart contracts.
• Collaborate with product managers, front-end developers, and other stakeholders to define contract specifications.
• Optimize smart contract performance and gas efficiency.
• Mentor junior engineers and contribute to the team's overall technical growth and best practices in Sandton .

Requirements

• 5+ years of professional experience in software development, with at least 3 years focused on smart contract engineering.
• Expert-level proficiency in Solidity and experience with the Ethereum Virtual Machine (EVM).
• Strong understanding of blockchain fundamentals, cryptography, and decentralized application architecture.
• Experience with testing frameworks (e.g., Hardhat, Truffle) and security analysis tools.
• Familiarity with Layer 2 scaling solutions and other blockchain interoperability protocols.
• Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent work experience.

Benefits

• Highly competitive salary and potential for token-based incentives.
• Fully remote work arrangement with flexible hours.
• Comprehensive medical, dental, and vision insurance.
• Significant budget for professional development, attending conferences, and acquiring new skills.
• Opportunity to work on cutting-edge blockchain projects and influence product direction.