Senior AI Security Engineer – Autonomous PenTesting Platform

Synack; United States; On-site; USD 145,000 - 250,000; Full time

Job summary

Synack is seeking a senior software/AI engineer to design and ship autonomous security agents that plan, reason, and operate within a sandboxed lab. You will own end‑to‑end systems, expanding capabilities from development to production while maintaining safety and cost controls.

This remote US‑based role requires strong Python, Go, Docker/Kubernetes experience and a passion for understanding how systems are compromised, with collaboration across security researchers and engineers.

Qualifications

• 7+ years of experience in software engineering.
• Proven ability to build and scale production systems.
• Strong Python, polyglot codebase.
• Fluent or willing to learn Go.
• Experience building LLMs and agentic frameworks leveraging tools like RAG, MCP- from dev environment to production.
• Demonstrate ability to create reliable agents (prompting, evaluation, guardrails, understanding of token and cost optimization).
• Capable leveraging Docker, Kubernetes, isolated sandbox, cloud experience GCP preferred.
• Brings a disciplined testing approach to microservices gPRC, API design, async messaging (Pub/Sub, Kafka).
• Passionate desire to understand how systems get compromised.
• Clear communication
• Collaborative ability to partner across teams.

Responsibilities

• Build AI agents that automate penetration testing: planning, tool use, reasoning over findings, and acting safely within scope.
• Stand up and run the sandboxed cyber-lab and range infrastructure, containerised on Kubernetes, where these agents execute offensive tooling.
• Ship features from ideation through production, including evals, guardrails and monitoring.
• Improve how our agents work: prompting, tool orchestration, evaluation, and cost.
• Lead code reviews and design sessions, and help the engineers around you grow.
• Work closely with our security researchers to translate how they hack into how our agents operate.

Skills

Software engineering experience

Production systems

Python

Go

LLMs

Docker

Kubernetes

GCP

API design

Microservices

Testing

Tools

Python

Go

Docker

Kubernetes

GCP

Pub/Sub

Kafka

Job description

Synack is seeking a senior software/AI engineer to design and ship autonomous security agents that plan, reason, and operate within a sandboxed lab. You will own end‑to‑end systems, expanding capabilities from development to production while maintaining safety and cost controls.

This remote US‑based role requires strong Python, Go, Docker/Kubernetes experience and a passion for understanding how systems are compromised, with collaboration across security researchers and engineers.