Mysten Labs
Senior Security Engineer
$165K–$225K
USA (Remote) · Remote · Senior · Full-time · Posted Oct 21, 2026
- Experience
- 5+ years; security engineering, detection and response, or infrastructure/SRE with a security focus.
- Education
- Bachelor's degree in Computer Science, Computer Engineering, a relevant technical field, or equivalent practical experience.
About the job
Build and operate security infrastructure, detection and response capabilities, endpoint defenses, and AI-agent-based security automation.
What you'll do
- Operate the security observability and data platform, including telemetry pipelines, queries, and detections.
- Lead threat hunting and incident response, and build production security services and endpoint protections.
- Run an agent platform that uses LLMs to automate security triage, investigation, and response.
What they ask for
- Bachelor's degree in a relevant technical field or equivalent practical experience.
- 5+ years in security engineering, detection and response, or security-focused infrastructure/SRE, including hands-on endpoint and cloud incident response.
- Experience with EDR, detections, TB-scale telemetry pipelines and SIEM or security data lakes; strong SQL.
- Production engineering experience with Linux, containers, Kubernetes, a major public cloud, infrastructure as code, monitoring and alerting; proficiency in Python or Go and comfort with Rust or willingness to work in it.
Nice to have
- Experience building zero-trust access, identity-aware proxies, or policy engines.
- Experience building security tooling with LLM agents and understanding when deterministic tools are needed.
Pay
$165K – $225K (USD, base salary)
Tools
EDR, SIEM, SQL, Linux, Kubernetes, AWS/GCP, Python, Go
AI focus
Build and operate an agent platform using LLM agents to automate security triage, enrichment, investigation, and response, with deterministic checks where needed.
Model-written summary · the original posting is authoritative