Arena
Software Engineer - Product Security
$150K–$350K
SF Bay Area · On-site · Full-time · Posted Dec 18, 2025
- Experience
- 6+ years of software or security engineering experience; meaningful time building and shipping production systems at scale.
About the job
Build and ship product security systems in Arena’s production code, including identity, authorization, privacy, application security, and protections for AI-related product surfaces.
What you'll do
- Design and implement authentication, authorization, account and credential lifecycles, and multi-tenant isolation.
- Build privacy and data-lifecycle controls, security event records, and protections for AI, APIs, and browser surfaces.
- Ship security-sensitive changes end to end, including migrations, integrations, threat modeling, and reusable security patterns.
What they ask for
- 6+ years of software or security engineering experience, including meaningful time building and shipping production systems at scale.
- Recent hands-on production engineering experience and code-level application/API security judgment.
- Strong proficiency in a modern backend language; experience with Postgres, data modeling, and production migrations.
- Working fluency with application cryptographic primitives, plus multi-tenant systems experience where isolation is a hard requirement.
Pay
$150K – $350K (base salary)
Tools
TypeScript, Go, Python, Postgres, Hono, Next.js + React, Terraform + Spacelift, Vitest
AI focus
Secure AI, agentic, and LLM-backed systems, including untrusted model output, tool use, sandboxed code execution, provider isolation, and evaluation-data controls.
Model-written summary · the original posting is authoritative