Senior Blockchain Security Engineer

Placements24; Benoni; Hybrid; ZAR 900,000 - 1,500,000; Full time

Benefits offered by this job

Remote work

Professional development

Job summary

Placements24 is seeking a Senior Blockchain Security Engineer to join a global, remote-first team shaping the future of decentralized technology. You will drive security audits, design robust cryptographic defenses, and embed security throughout the development lifecycle, from design to deployment.

The ideal candidate has 6+ years in cybersecurity with a strong blockchain specialty, hands-on experience auditing smart contracts, performing pentests, and using Solidity, Rust, and Go.

Qualifications

• Bachelor's degree in CS, Cybersecurity, or related field.
• 6+ years in cybersecurity with blockchain security specialization.
• Experience in smart contract auditing, pentesting, and vulnerability analysis.
• Deep understanding of blockchain concepts, cryptography, and common attack vectors.
• Proficiency with security assessment tools and blockchain languages (Solidity, Rust, Go).

Responsibilities

• Conduct security assessments of blockchain protocols, smart contracts, and dApps.
• Identify vulnerabilities, threats, and risks in blockchain tech.
• Perform penetration testing and code reviews to remediate flaws.
• Design security architectures for new blockchain projects.
• Respond to security incidents and perform forensics.
• Collaborate with teams to ensure secure deployment of systems.
• Develop security tooling and automation for monitoring.

Skills

Blockchain security

Smart contract auditing

Penetration testing

Threat modeling

Security tooling proficiency

Cryptography basics

Communication skills

Education

Bachelor's degree in Computer Science, Cybersecurity, or related field

Tools

Solidity

Rust

Go

Job description

About the Role

Our client, a leading innovator in the decentralized application space, is seeking a Senior Blockchain Security Engineer to join their rapidly growing team. While the team is spread across various locations, this role offers the flexibility of being fully remote, with potential collaboration opportunities in Benoni, Gauteng. You will be responsible for ensuring the security integrity of our blockchain infrastructure, smart contracts, and decentralized applications. This role requires a proactive approach to identifying and mitigating potential security vulnerabilities, conducting thorough security audits, and implementing robust security measures. The ideal candidate possesses a deep understanding of blockchain technology, common security threats, and best practices for secure development. You will work closely with development teams to embed security throughout the entire development lifecycle, from design to deployment. This is a critical role in safeguarding our users' assets and maintaining the trust and reputation of our platform. We are looking for a security-first mindset and a passion for protecting the decentralized ecosystem.

Key Responsibilities

• Conduct comprehensive security assessments of blockchain protocols, smart contracts, and dApps.
• Identify and analyze security vulnerabilities, threats, and risks associated with blockchain technologies.
• Develop and implement security best practices and guidelines for blockchain development teams.
• Perform penetration testing and code reviews to detect and remediate security flaws.
• Design and implement security architectures for new blockchain projects and features.
• Respond to security incidents, conduct forensic analysis, and implement containment and recovery strategies.
• Stay abreast of the latest security threats, vulnerabilities, and mitigation techniques in the blockchain space.
• Collaborate with development and operations teams to ensure secure deployment and operation of blockchain systems.
• Contribute to the development of security tools and automation for continuous security monitoring.
• Provide security expertise and guidance to internal teams and external partners.

Requirements

• Bachelor's degree in Computer Science, Cybersecurity, or a related field.
• Minimum of 6 years of experience in cybersecurity, with a strong specialization in blockchain security (4+ years).
• Proven experience in smart contract auditing, penetration testing, and vulnerability analysis of blockchain systems.
• Deep understanding of blockchain concepts, cryptography, and common attack vectors (e.g., reentrancy, 51% attacks).
• Proficiency in security assessment tools and techniques.
• Experience with programming languages commonly used in blockchain development (e.g., Solidity, Rust, Go).
• Excellent analytical and problem-solving skills, with a meticulous attention to detail.
• Strong communication and reporting skills, with the ability to clearly articulate complex security issues.
• Remote work experience is essential for this position.

Benefits

• Competitive salary and performance incentives.
• Comprehensive health and wellness benefits.
• Opportunities for professional development and advanced security training.
• Work on cutting-edge blockchain security challenges.
• Flexible remote work arrangement.