[Hiring] Senior Security Engineer @MOXFIVE

Role Description

MOXFIVE is building technologies that leverage AI to streamline the response, recovery, and resilience from cyber-attacks in enterprises. We are looking for a talented Senior Security Engineer to join as a core member of our founding engineering team, where you will own the security of the platforms, cloud environments, and AI systems our customers trust during the worst days of their business.

At MOXFIVE, security is the product. Customers rely on us while they are under attack, and the platforms and AI systems we build must earn that trust every day. You will help design and defend the boundaries that keep their data protected.

You will own security across our cloud infrastructure, AI platforms, and corporate environment, including:

• Endpoints
• Identity
• Email
• Business applications

This means building detection and response for our own environment, driving cloud and container posture to a defensible state, securing the software supply chain, and setting the controls that let us show customers and partners exactly how their data is protected.

Qualifications

• 6+ years of hands-on security engineering experience, with at least 3 years securing production cloud environments
• Deep experience securing workloads on major public cloud platforms, including:
• Identity and access management
• Network segmentation
• Encryption and key management
• Logging
• Organization-level guardrails
• Production experience securing container orchestration platforms and containerized workloads, including:
• Image hardening
• Admission control
• Runtime protection
• Hands-on experience with cloud security posture management, vulnerability prioritization, and cloud workload protection
• Hands-on experience with enterprise EDR and XDR platforms, from policy tuning through detection triage and response
• Experience building detections and running investigations across cloud, identity, and endpoint telemetry
• Strong understanding of identity security, including:
• SSO
• MFA
• Conditional access
• Least privilege access for engineers and service accounts
• Experience securing CI/CD and the software supply chain, including:
• Static analysis
• Secret scanning
• Infrastructure-as-code scanning
• Dependency risk
• Artifact integrity
• Infrastructure-as-code experience, and the ability to fix what you find rather than file tickets for it
• Proficiency in Python or Go for automation, tooling, and detection engineering
• Experience with secrets management at scale
• Experience securing corporate IT, including:
• Device management
• Endpoint hardening
• Email and SaaS application security
• Sound judgment handling sensitive, privileged, and regulated data

Nice to Have

• Experience in incident response, DFIR, or a managed detection and response environment
• Experience securing LLM and agentic AI systems, including:
• Prompt injection defenses
• Action authorization
• Isolation of untrusted execution
• Experience with Zero Trust access architectures
• Experience with multi-tenant SaaS isolation and third-party integrations
• Working knowledge of SOC 2, ISO 27001, or similar frameworks, with a bias toward controls that are automated and evidenced continuously
• Offensive security, red team, or cloud penetration testing experience
• Relevant certifications such as OSCP, GCIH, GCFA, or cloud security specialty certifications