MLabs
Technology
ProductSecurityEngineer
Neural analysis suggests this role is
optimal for Mid+ candidates.
“Product Security Engineer at MLabs. Skills: Blockchain security, Smart contract security, Cryptographic systems, Vulnerability discovery. Conduct security assessments. Own threat modeling”
Industry & Context.
Root cause analysis; Debugging; Troubleshooting
What They're Looking For.
Must Have
Hands-on vulnerability discovery, Security testing across blockchain protocols, Identify architectural bugs, Threat modeling experience, Security architecture review experience, Assess cross-chain protocols, Auditing cross-chain bridges, Working knowledge of applied cryptography, Reason about cryptographic failure modes, Analyze trust model tradeoffs, Mastery of blockchain security, Secure coding practices, Proficiency with security testing tooling, Develop custom fuzzing harnesses, Build security test infrastructure, Audit cryptographic code in Rust, Audit cryptographic code in Java, Understanding of memory safety, Understanding of constant-time correctness, Understanding of secret handling, Understanding of JNI boundary risks
Nice to Have
Designing grammar-aware fuzzing, Operating grammar-aware fuzzing, Building classifier pipelines, Building custom security automation tooling, Security work on Ethereum consensus clients, Security work on production threshold signature systems, Integrating AI-assisted workflows
What You'll Do.
Conduct security assessments
Own security architecture reviews
Identify real-world vulnerabilities
Perform adversarial testing
Develop proof-of-concept exploits
Partner with engineering teams
Define security gates
Enforce security gates
Build security tooling
Scale security tooling
Improve security tooling
Build fuzzing infrastructure
Scale fuzzing infrastructure
Improve fuzzing infrastructure
Build CI/CD security automation
Scale CI/CD security automation
Improve CI/CD security automation
Track attack patterns
Drive mitigation strategies
How You'll Work.
Team & Collaboration
Core engineering teams
Full Job Description
**Location: **Remote - Remote APAC & EU **Remote | Full-time** **Compensation:** $75K - $85K Our client is a fast-growing, enterprise-grade software organization committed to supporting, developing, and servicing a leading open-source, proof-of-stake distributed ledger platform. As an EVM-compatible network built to meet the rigorous demands of global developers and institutions, the platform prioritizes speed, security, stability, and sustainability, and is governed by industry-leading organizations across multiple sectors and regions. As the platform scales with new protocol upgrades, EVM-compatible services, cross-chain infrastructure, and cryptographic primitives, managing the expanding attack surface is paramount. **The Product Security Engineer** will be responsible for embedding security directly into the product development lifecycle, ensuring that security remains a first-class property of every protocol upgrade, smart contract, and node shipped to production. This role focuses on hands-on vulnerability discovery, adversarial testing, and proactive threat mitigation before code reaches production. **Key Responsibilities** * **Security Assessments & Threat Modeling:** Conduct end-to-end security assessments of blockchain-based systems, spanning cryptographic primitive design, protocol architecture, smart contract implementation, and deployed infrastructure. Own threat modeling and security architecture reviews across all product phases. * **Vulnerability Discovery & Exploitation:** Identify real-world vulnerabilities through rigorous hands-on code reviews, adversarial testing, and the development of proof-of-concept exploits for native services, EVM-compatible contracts, cross-chain bridges, and consensus-layer components. * **Engineering Partnership:** Partner directly with core engineering teams to translate complex cryptographic and protocol-level risks into prioritized, actionable remediation workflows. Define and enforce security gates prior to producti
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