Mysten Labs
Senior Security Engineer, DeFi
$165K–$225K
USA (Remote) +1 · Remote · Senior · Full-time · Posted Sep 23, 2026
- Location
- USA (Remote)
Canada (Remote) - Experience
- 3+ years in security engineering, smart contract security, or DeFi risk engineering.
- Education
- Bachelor’s degree in Computer Science, Computer Engineering, a relevant technical field, or equivalent practical experience.
About the job
Protect the Sui DeFi ecosystem by monitoring security and economic risks, finding vulnerabilities, and coordinating remediation with protocol teams.
What you'll do
- Build continuous ecosystem monitoring and extend security analysis tools.
- Audit high-TVL protocols, assess upgrades and incidents, and help fix critical vulnerabilities.
- Track security recommendations and coordinate with external DeFi teams and Mysten’s products, including DeepBook.
What they ask for
- Bachelor’s degree in Computer Science, Computer Engineering, a relevant technical field, or equivalent practical experience.
- 3+ years of hands-on security engineering, smart contract security, or DeFi risk engineering experience.
- Strong understanding of DeFi mechanics and failure modes; proficiency in TypeScript and Python, comfort with Rust, and ability to write SQL over large datasets.
- Experience reading smart contract source, bytecode, or disassembly; strong communication skills and interest in web3.
Nice to have
- Sui and Move experience; knowledge of DeFi exploits and static or dynamic program analysis.
- Experience building LLM-agent analysis or monitoring tools, quantitative risk modeling, or relevant publications and security credentials.
Pay
$165K – $225K (currency and pay basis not stated)
Tools
Sui, Move, TypeScript, Python, Rust, SQL, Claude Code, GraphQL
AI focus
Build analysis or monitoring tools using LLM agents; the posting also notes AI may assist with candidate evaluation, with hiring decisions made by humans.
Model-written summary · the original posting is authoritative