Product Security Engineer (Blockchain Security)

Tasks

💰 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.

Requirements

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

Benefits

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