Mid/Senior/Staff Software Engineer, Agents

Join Harvey's Agents team to build AI systems that make agentic work indispensable to legal professionals across 1, 000+ customers worldwide. In this high-ownership role at a fast-scaling company, you'll design evaluations, optimize agent performance, and ship infrastructure that transforms complex workflows like M&A diligence and contract review.

What you'll do

• Partner with customers and product managers to understand legal workflows and ship agents that deliver measurable results.
• Design practical evaluations that define what "excellent" means for agentic task completion.
• Optimize agent performance through prompt engineering, model selection, tool design, and context window management.
• Collaborate with the model infrastructure team to build low-latency execution systems using strategies like caching and parallel tool calls.
• Improve observability and instrumentation to profile agent behavior, identify bottlenecks, and guide optimization decisions.
• Stay current on developments in agentic systems and bring those learnings into the products we build.

What Harvey is looking for

• 3+ years of software engineering experience (Harvey is hiring at mid, senior, and staff levels).
• Proficiency in Python and hands-on experience with LLM APIs and agent frameworks.
• Track record shipping user-facing products on the backend or full-stack.
• Passion for building effective domain-specific agents.
• Iterative mindset: you develop proof of concepts, make decisions quickly, and ship early versions.
• Comfort using practical evaluations to drive task completion quality.
• Humble and adaptable approach to adopting new frameworks and best practices as they emerge.