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Senior Smart Contract Auditor - Security Focus

Job in Randburg, Johannesburg, 2000, South Africa
Listing for: Placements24
Contract position
Listed on 2026-10-19
Job specializations:
  • IT/Tech
    Cybersecurity, Blockchain / Web3, Information Security & Data Protection, Security Management & Operations
Job Description & How to Apply Below
Location: Randburg

About the Role

Our client, a highly reputable firm within the Crypto & Blockchain sector, is searching for an experienced Senior Smart Contract Auditor to bolster their security team in Randburg, Gauteng
. This role is paramount in ensuring the integrity and safety of our clients' decentralized applications and token offerings. You will be responsible for conducting in-depth security assessments of smart contracts, identifying vulnerabilities, and providing actionable recommendations for remediation. The ideal candidate possesses exceptional analytical skills, a meticulous attention to detail, and a deep understanding of smart contract exploit vectors and security best practices.

Join us in Randburg and contribute to building a more secure blockchain ecosystem.

Key Responsibilities
  • Perform comprehensive security audits of smart contracts on various blockchain platforms (e.g., Ethereum, BSC, Polygon).
  • Identify potential vulnerabilities, including reentrancy, integer overflows/under flows, access control issues, and gas limit exploits.
  • Analyze smart contract code for logic flaws, security risks, and adherence to best practices.
  • Develop and execute test cases to validate contract functionality and security.
  • Provide clear, concise, and actionable audit reports with detailed findings and remediation guidance.
  • Collaborate with development teams to explain vulnerabilities and assist in the remediation process.
  • Stay current with the latest smart contract attack vectors, security trends, and auditing techniques.
  • Contribute to the development of internal auditing tools and methodologies.
  • Mentor junior auditors and contribute to team knowledge sharing.
Requirements
  • Bachelor's or Master's degree in Computer Science, Cybersecurity, or a related field.
  • 5+ years of experience in smart contract development and/or security auditing.
  • In-depth knowledge of Solidity and the Ethereum Virtual Machine (EVM).
  • Proven experience identifying a wide range of smart contract vulnerabilities.
  • Proficiency with smart contract auditing tools and frameworks (e.g., Slither, Mythril, Foundry).
  • Strong understanding of blockchain principles, cryptography, and common DeFi protocols.
  • Excellent analytical, problem-solving, and technical writing skills.
  • Ability to work independently and manage multiple audit projects simultaneously.
  • Strong communication skills for interacting with clients and development teams in Randburg, Gauteng
    .
  • Experience with formal verification methods is a plus.
Benefits
  • Highly competitive salary and bonus structure.
  • Comprehensive health insurance and wellness programs.
  • Opportunities for continuous professional development and conference attendance.
  • Work with a leading team on high-profile Crypto & Blockchain projects.
  • Be a key contributor to security assurance in the blockchain space.
  • Vibrant office environment in Randburg
    .
Position Requirements
10+ Years work experience
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