Senior Software Engineer, Agents

Harvey

. Partner with customers and PMs to understand legal workflows, design practical evaluations that capture what “excellent” means, and ship agents that get the job done.

Posted 5/1/2026full-timeNew York City • New York • 🇺🇸 United StatesSenior💰 $193,400 - $290,000 per yearWebsite

Tech Stack

Tools & technologies

Python

About the role

Key responsibilities & impact

Partner with customers and PMs to understand legal workflows, design practical evaluations that capture what “excellent” means, and ship agents that get the job done.
Optimize agent performance through prompt engineering, model selection, tool design, skill writing, context window management, and eval harness development.
Work with our model infra team to design and implement infrastructure for low-latency agent execution, including caching strategies, parallel tool calls, or subagent patterns.
Improve our observability and instrumentation to profile agent behavior, identify bottlenecks, and drive optimization decisions.
Stay current on new developments in agentic systems and bring those learnings back to the products we build.

Requirements

What you’ll need

5-8 years (post-BS/MS) of software engineering experience
Proficiency in Python and experience working with LLM APIs and agent frameworks
Experience with shipping user-facing products, either on the backend or full-stack
Comfortable with when and how to use evaluations to drive quality.
Passion for building effective domain-specific agents.
Iterative mindset: you develop proof of concepts, make decisions quickly, and ship v0s.
Humble and adaptable about code and frameworks. We expect you to drive adoption of new best practices as they develop.

Benefits

Comp & perks

Comprehensive health, dental and vision coverage
Retirement benefits (401k match up to 4%)
Flexible PTO
Offers Equity
Offers Bonus

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

PythonLLM APIsagent frameworksprompt engineeringmodel selectiontool designskill writingcontext window managementeval harness developmentobservability

Soft Skills

iterative mindsetadaptabilityhumilitydecision makingcustomer partnership