Member of Technical Staff, AI Engineer

Parameter ai is hiring a Member of Technical Staff, AI Engineer in San Francisco to build LangGraph/Temporal-based agent systems for autonomous offensive security testing.

Responsibilities

• Design and ship agent workflows in LangGraph and Temporal to plan, execute, and verify multi-step exploitation chains
• Build the agent tool layer, including HTTP clients, authentication handling, browser control, cloud enumeration, and payload generation
• Own the evaluation loop by defining what “good” means for agent runs using Braintrust and Langfuse, with the goal of improving outcomes over time
• Work to reduce false positives, identified as the hardest problem in this space and a top customer priority
• Manage inference cost and latency at scale, including prompt caching, context strategy, and model selection across Claude and AWS Bedrock

Requirements

• 3+ years of software engineering experience
• At least one year building production LLM systems (not prototypes or demos)
• Strong TypeScript
• Comfort with async development, distributed systems, and long-running workflow orchestration
• Intuition for context engineering, tool design, and why agents fail in real environments
• Data-driven evaluation: built or maintained an eval harness, including understanding why offline metrics can diverge from production behavior
• Bonus: security background, CTF experience, bug bounty history, or a track record of breaking things you were not supposed to break

Technologies

• TypeScript, LangGraph, Temporal
• GCP
• AWS Bedrock, Anthropic API
• Langfuse, Braintrust
• GitHub Actions, Linear, Graphite

Interview Process

• Intro call with a founder (30 minutes)
• Technical deep dive on your past work (60 minutes)
• Paid work trial or take-home, scoped to roughly one day
• Onsite in San Francisco with the team
• References and offer

Location and Work Authorization

• Onsite in San Francisco, CA
• US work authorization required; visa sponsorship is not available

Compensation: USD 180,000 - 240,000 per year