Sr. Security Engineer (AI)
Hi Marley · Hybrid - Boston, MA
Posted about 3 months ago · $121,000–$226,000
or apply directly on Hi Marley's site. We never take the application ourselves.
Is this posting real?
- This role has been open
- 80 days Hi Marley's roles stay open a median of 80 days
- Reposted
- No
- Salary listed
- Yes 100% of Hi Marley's roles list one
- Ghost-job risk at Hi Marley
- high 11 stale, 0 reposted of 11 open
- Hiring momentum
- 17 roles opened in the last 90 days ↑ up vs. the prior 90 days
- Last confirmed on the employer's board
- 2026-10-22
Measured from postings appearing on and disappearing from Hi Marley's own greenhouse board since 2026-08-03. Full hiring picture for Hi Marley.
About this role
The Senior Security Engineer II at Hi Marley will focus on securing AI applications within the company, particularly in the internal AI environment. Responsibilities include threat modeling, implementing security controls, conducting risk assessments, and maintaining compliance documentation. The role requires hands-on engineering work and collaboration with various teams to ensure the safe use of AI technologies.
- benefits
- 4/5
- freshness
- 1/5
- career value
- 4/5
- role clarity
- 5/5
- pay transparency
- 5/5
Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of Hi Marley as an employer.
What you need
- 5+ years in security engineering, application security, or infrastructure security, with hands-on exposure to AI/ML systems
- Experience securing or building LLM-based systems, agentic frameworks, or ML pipelines in cloud environments
- Solid understanding of AI-specific attack surfaces: prompt injection, tool-use exploitation, privilege escalation through inherited access, data poisoning, and model/training-data leakage
- Hands-on familiarity with how AI systems actually work
- Strong proficiency in Python and experience building security tooling, automation, and testing
- Strong working knowledge of AWS security: IAM, networking, container isolation, encryption, and monitoring
Nice to have
- Experience running or contributing to AI red-teaming or adversarial testing
- Experience with MCPs, agent orchestration frameworks, or similar agentic infrastructure
- Background in DLP, monitoring, or observability for AI or cloud workloads
- Experience at a growth-stage B2B SaaS company
What you get
- Annual base salary expected to fall within the range of [$121,000–$226,000]
- Equity grants for all employees
- A 4% matching 401(k) program
- Medical, dental, vision, disability, and life insurance coverage for employees working 30+ hours per week
- Monthly wellness stipend
- Paid parental leave
Worth weighing
- Hybrid work environment requires 3 days in the Boston office each week
- Focus on AI security may limit exposure to broader security engineering practices
- No specific mention of career advancement opportunities within the role
Summarised from Hi Marley's posting. Read the full original.
Listed by Hi Marley on their greenhouse job board, last confirmed open on 2026-10-22. PitchMeAI is not the employer.
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