Product Security Engineer (Blockchain Security)

💰 **Salary:** $75,000 – $85,000/year 🌍 **Location:** Remote (APAC & Europe) About the Opportunity We are partnering with a leading blockchain infrastructure company that is building secure, scalable, and enterprise-grade distributed ledger technology powering next-generation Web3 applications. As the platform expands its protocol capabilities, smart contract ecosystem, and cross-chain infrastructure, the security team is seeking a highly skilled **Product Security Engineer** to proactively identify vulnerabilities, strengthen protocol security, and protect critical blockchain systems before they reach production. What You'll Do * Conduct end-to-end security assessments across blockchain protocols, smart contracts, cryptographic systems, and infrastructure. * Identify real-world vulnerabilities through manual review, adversarial testing, and proof-of-concept exploit development. * Design and execute security testing strategies for protocol components, cross-chain bridges, and distributed systems. * Lead threat modeling exercises and security architecture reviews. * Define and enforce security gates throughout the software development lifecycle. * Collaborate closely with engineering teams to prioritize and remediate security risks. * Build and improve security tooling, fuzzing frameworks, and CI/CD security automation. * Research emerging Web3 attack vectors and proactively mitigate potential threats. Core Qualifications * Strong hands-on experience in vulnerability discovery and security testing across blockchain systems. * Proven ability to identify real vulnerabilities beyond automated scanning tools. * Experience performing threat modeling and security architecture reviews. * Deep understanding of blockchain security, smart contracts, nodes, APIs, and distributed systems. * Experience assessing cryptographic protocols, trust models, or cross-chain infrastructure. * Strong knowledge of applied cryptography and modern security principles. * Ability to audit and review Rust and/or Java codebases. * Understanding of memory safety, secret management, and secure software development practices. Preferred Qualifications * Experience developing fuzzing infrastructure or advanced security testing frameworks. * Experience with static analysis, dynamic analysis, and automated security tooling. * Background in consensus-layer security or blockchain protocol development. * Experience auditing cross-chain bridges. * Knowledge of threshold signature systems, multisig architectures, and oracle security. * Experience integrating AI-assisted workflows into security review processes. What Success Looks Like Within the first 6–12 months, you will: ✅ Integrate security review processes into core development workflows ✅ Improve automated security coverage through tooling and CI/CD integration ✅ Reduce vulnerability backlog through structured collaboration with engineering teams ✅ Strengthen organizational knowledge of blockchain attack vectors and secure coding practices Competitive compensation package Fully remote work environment Opportunity to work on cutting-edge blockchain infrastructure Exposure to advanced cryptography and distributed systems High-impact role protecting critical Web3 technology at scale Work alongside world-class engineers and security researchers