Senior Blockchain Security Auditor

Placements24; Windsor Park (TN); Hybrid; USD 73,000 - 109,000; Full time

Benefits offered by this job

Hybrid work model

Professional development budget

Conferences and certifications

Job summary

Placements24 is seeking a Senior Blockchain Security Auditor for a hybrid role in East London, SA. You will conduct comprehensive security assessments of smart contracts and dApps, identify vulnerabilities, and propose remediation strategies to diverse clients.

The role requires deep knowledge of Solidity, EVM internals, and cryptographic principles, with opportunities for professional growth and security conference participation.

Qualifications

• Master's degree or equivalent in CS/Cybersecurity.
• 5+ years in cybersecurity with focus on blockchain security and audits.
• Expert Solidity and deep EVM understanding.
• Proven ability to identify complex vulnerabilities in smart contracts.
• Strong cryptography knowledge and security best practices.

Responsibilities

• Perform security audits and code reviews for Solidity smart contracts.
• Identify vulnerabilities such as reentrancy, overflows, gas issues, access flaws.
• Develop penetration testing for dApps and blockchains.
• Conduct threat modeling and risk assessments for projects.
• Provide actionable remediation guidance to clients.
• Stay current on security threats and mitigation techniques.
• Contribute to internal tools, methodologies and best practices.
• Collaborate with developers to enforce secure coding standards.
• Mentor junior analysts and share knowledge.

Skills

Solidity expert

Ethereum basics

Analytical thinking

Technical writing

Communication skills

Education

Master's degree or equivalent in Computer Science or Cybersecurity

Tools

Security analysis tools

Fuzzing techniques

Formal verification methods

Job description

About the Role

Our client, a leading cybersecurity firm specializing in blockchain and smart contract security, is seeking an experienced Senior Blockchain Security Auditor to join their elite team in East London, Eastern Cape . You will be responsible for conducting in-depth security assessments of smart contracts, dApps, and blockchain protocols, identifying vulnerabilities, and providing actionable recommendations to clients. This role requires a deep understanding of blockchain technology, smart contract languages (especially Solidity), common attack vectors, and robust security best practices. The ideal candidate is a highly analytical and detail-oriented professional with a proven track record in identifying and mitigating complex security risks within the decentralized ecosystem. You will play a critical role in ensuring the security and integrity of digital assets and blockchain-based systems for a wide range of clients. We foster a culture of continuous learning and innovation, providing the tools and environment for you to excel in this rapidly evolving field. Your expertise will be vital in safeguarding our clients' valuable projects and maintaining trust in the blockchain space.

Key Responsibilities

• Perform comprehensive security audits and code reviews for smart contracts written in Solidity and other relevant languages.
• Identify, analyze, and document vulnerabilities, including reentrancy attacks, integer overflows, gas limit issues, and access control flaws.
• Develop and execute advanced penetration testing strategies for dApps and blockchain platforms.
• Conduct threat modeling and risk assessments for new and existing blockchain projects.
• Provide clear, concise, and actionable remediation advice to clients.
• Stay at the forefront of blockchain security threats, attack vectors, and mitigation techniques.
• Contribute to the development of internal security tools, methodologies, and best practices.
• Collaborate with development teams to implement secure coding standards.
• Mentor junior security analysts and contribute to team knowledge sharing.
• Maintain client confidentiality and provide exceptional professional service.

Requirements

• Master's degree or equivalent experience in Computer Science, Cybersecurity, or a related field.
• 5+ years of experience in cybersecurity, with a significant focus on blockchain security and smart contract auditing.
• Expert-level proficiency in Solidity and deep understanding of Ethereum Virtual Machine (EVM) internals.
• Proven experience identifying complex vulnerabilities in smart contracts and blockchain protocols.
• Strong knowledge of cryptographic principles and common blockchain security flaws.
• Experience with security analysis tools, fuzzing techniques, and formal verification methods.
• Familiarity with various blockchain platforms (e.g., Ethereum, BSC, Polygon, Solana).
• Excellent analytical, problem-solving, and critical thinking skills.
• Strong technical writing and communication skills.
• Ability to manage multiple audit engagements and meet deadlines.

Benefits

• Highly competitive salary and performance-based bonuses.
• Comprehensive health, dental, and vision insurance plans.
• Generous paid time off and flexible working hours.
• Opportunities for professional growth, certifications, and attending security conferences.
• Work with a diverse range of cutting-edge blockchain projects.
• Collaborative and intellectually stimulating work environment.
• Hybrid work model offering flexibility.
• Retirement savings plan.
• Professional development budget.