Elite Red Team Penetration Tester

Pt Sigma Cipta Caraka (Telkomsigma); Tangerang; On-site; IDR 300,000,000 - 500,000,000; Full time

Job summary

Pt Sigma Cipta Caraka (Telkomsigma) is seeking a Senior Blockchain Security Engineer to join our security team in Bekasi. You will lead penetration testing, security assessments, and vulnerability analyses across blockchain platforms and dApps on-site.

The role requires deep expertise in blockchain security, cryptography, and secure coding practices, with collaboration across engineering teams and a drive to stay ahead of evolving threats in the crypto space.

Qualifications

• Bachelor's degree in Computer Science, Cybersecurity, or related field, or equivalent experience.
• Minimum of 5 years in cybersecurity with focus on blockchain security and penetration testing.
• Experience with smart contracts (Solidity, Rust) vulnerabilities and blockchain infrastructure.

Responsibilities

• Perform comprehensive security audits and penetration testing of blockchain protocols, smart contracts, and dApps.
• Identify vulnerabilities, threats, and attack vectors in systems.
• Develop and implement security testing methodologies and tools.
• Conduct risk assessments and provide actionable remediation recommendations.
• Collaborate with development teams to remediate identified vulnerabilities.
• Stay current with security threats in blockchain and crypto space.
• Contribute to secure coding guidelines and best practices.

Skills

Blockchain security

Penetration testing

Vulnerability assessment

Cryptography

Communication

Team collaboration

Education

Bachelor's degree in CS/Cybersecurity

Tools

Solidity tooling

Rust tooling

Blockchain security tools

Job description

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Senior Blockchain Security Engineer - Penetration Testing

About the Role Our client, a leading firm in the decentralized technology sector, is seeking an experienced Senior Blockchain Security Engineer to join their dedicated security team in Bekasi . This role is integral to identifying and mitigating security risks across their blockchain platforms and decentralized applications. You will conduct in-depth security assessments, penetration tests, and vulnerability analyses to ensure the robustness and safety of their systems. This is an on‑site position located in Bekasi , offering a challenging and rewarding career opportunity within a rapidly evolving industry. Key Responsibilities

• Perform comprehensive security audits and penetration testing of blockchain protocols, smart contracts, and dApps.
• Identify and analyze security vulnerabilities, threats, and potential attack vectors.
• Develop and implement security testing methodologies and tools.
• Conduct risk assessments and provide actionable recommendations for security improvements.
• Collaborate with development and engineering teams to remediate identified vulnerabilities.
• Stay current with the latest security threats and trends in the blockchain and cryptocurrency space.
• Contribute to the development of secure coding guidelines and best practices for the engineering teams.
• Document security findings, methodologies, and remediation plans clearly and concisely.

Requirements

• Bachelor's degree in Computer Science, Cybersecurity, or a related field, or equivalent practical experience.
• Minimum of 5 years of experience in cybersecurity, with a significant focus on blockchain security and penetration testing.
• Demonstrated expertise in identifying vulnerabilities in smart contracts (Solidity, Rust) and blockchain infrastructure.
• Hands‑on experience with security testing tools and frameworks relevant to blockchain.
• Strong understanding of cryptography, network security, and secure coding principles.
• Experience with vulnerability assessment and risk management processes.
• Excellent analytical, problem‑solving, and communication skills.
• Ability to work effectively in a team‑oriented environment in Bekasi .

Benefits Our client offers a competitive salary, performance incentives, comprehensive health and wellness benefits, and ample opportunities for professional development and career advancement within the blockchain security field. Join a forward‑thinking company committed to securing the future of decentralized technology from our Bekasi location. This is an exciting opportunity to make a real impact in a critical area of the crypto industry.

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