Product Security Engineer – Blockchain Security

Ant-Tech

Product Security Engineer identifying vulnerabilities in blockchain systems for secure Web3 applications. Collaborating with engineering teams to enhance protocol security and prevent vulnerabilities.

Posted 6/13/2026full-timeRemote • 🇸🇬 SingaporeMid-LevelSenior💰 $75,000 - $80,000 per yearWebsite

Tech Stack

Tools & technologies

Distributed SystemsJavaOracleRustWeb3

About the role

Key responsibilities & impact

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

What you’ll need

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.
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.

Benefits

Comp & perks

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

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

vulnerability discoverysecurity testingthreat modelingsecurity architecture reviewsblockchain securitysmart contractsapplied cryptographyfuzzing infrastructurestatic analysisdynamic analysis

Soft Skills

collaborationleadershipproblem-solvingcommunicationprioritization