Lead Site Reliability Engineer
About The Position
The Lead Site Reliability Engineer partners with platform, data, QA, and product engineers to own the tooling, monitoring, alerting, emergency response, and system design that support organizational reliability and security. The role leads the design and stewardship of agentic, AI-driven security pipelines that continuously detect, triage, and help remediate vulnerabilities across code and infrastructure, with human-in-the-loop safeguards. This is a coaching and consulting role focused on understanding teams’ reliability and security needs, building tools and processes to address them, and empowering engineers to improve their systems. The position owns UnitedMasters’ AWS infrastructure and sets the long-term direction for reliability and security, balancing scalability and cost.
Requirements
- Senior-to-staff experience as an SRE, platform, or infrastructure engineer, with ownership of production reliability at scale.
- Hands-on application and/or infrastructure security experience sufficient to lead security discussions.
- Practical experience building with LLMs and agentic systems, including shipping a real-world system and understanding its failure modes and where human oversight is essential.
- Strong software engineering fundamentals and the ability to build tools and systems, not only configure them.
- A coaching mindset and commitment to raising the effectiveness of surrounding teams.
Responsibilities
- Partner with platform, data, QA, and product teams to understand their automation, infrastructure, monitoring, and security needs.
- Build tooling and processes to address needs surfaced through collaboration with teams.
- Build and maintain an agentic vulnerability detection and mitigation pipeline that scans, triages, and proposes fixes with human-in-the-loop guardrails.
- Embed security into the development lifecycle, including threat modeling, supply-chain hygiene, secrets management, and secure-by-default patterns.
- Lead security and reliability incident response.
- Define company-level SLAs, SLOs, and Error Budgets, and help teams establish their own.
- Guide system design toward shared tooling and decisions that support reliability, scalability, security, and maintainability.
- Participate in the on-call rotation, identify process gaps, and coach teams on response.
- Serve as a senior escalation point for infrastructure and security issues, helping resolve them while coaching teams to handle future issues.
- Own AWS infrastructure and set the long-term strategy for reliability and security, balancing scalability and cost.
Benefits
- Company-sponsored medical, dental, and vision plans.
- 401(k) with company match.
- Depending on the role and individual circumstances, additional compensation opportunities such as bonuses and stock options.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
