Full-Time

Staff Software Engineer

Agents

Updated on 9/4/2026

Harvey

Harvey

1,001-5,000 employees

Custom AI LLMs for elite firms

Compensation Overview

$231k - $340k/yr

San Francisco, CA, USA

Hybrid

Hybrid work in San Francisco.

Category
Software Engineering (1)
Required Skills
LLM
Python
Observability

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Requirements
  • The candidate must have 8+ years of post-Bachelor of Science or Master of Science software engineering experience.
  • The candidate must be proficient in Python and experienced with large language model application programming interfaces and agent frameworks.
  • The candidate must have experience shipping user-facing products on the backend or in full-stack environments.
Responsibilities
  • Partner with customers and product managers to understand legal workflows, design practical evaluations that capture excellence, and ship agents that complete the required work.
  • Optimize agent performance through prompt engineering, model selection, tool design, skill writing, context window management, and evaluation harness development.
  • Work with the model infrastructure team to design and implement infrastructure for low-latency agent execution, including caching strategies, parallel tool calls, and subagent patterns.
  • Improve observability and instrumentation to profile agent behavior, identify bottlenecks, and drive optimization decisions.
  • Stay current on developments in agentic systems and apply those learnings to product development.

Harvey.ai builds custom large language models tailored for elite law firms to tackle complex legal tasks across multiple practice areas and jurisdictions. Its products center on bespoke AI models, including an AI chatbot developed in partnership with Allen & Overy, designed to streamline workflows, reduce manual work, and improve decision-making in legal work. The company earns revenue through upfront customization fees plus ongoing subscription-based maintenance and feature updates, ensuring continuous support and improvements. Harvey.ai differentiates itself by offering highly customized, jurisdiction-spanning LLMs with strong data security and governance, backed by an Security Advisory Board and leading certifications, and by targeting top-tier law firms that require sophisticated AI tools. Its overarching goal is to enhance efficiency and accuracy in legal practice by providing elite, enterprise-grade AI solutions that handle complex challenges across global legal systems.

Company Size

1,001-5,000

Company Stage

Late Stage VC

Total Funding

$1.8B

Headquarters

San Francisco, California

Founded

2022

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Simplify Jobs

Simplify's Take

What believers are saying

  • September 9, 2026 funding lifted Harvey to $15.5 billion and over $1.5 billion raised.
  • Jackson Lewis deployed Harvey to 1,100 attorneys across 60 offices on August 24, 2026.
  • Macpherson Kelley rolled Harvey firmwide on September 2, 2026 after a year-long pilot.

What critics are saying

  • Harvey acquired Guardrails AI on September 9, 2026 because agent safety remains brittle.
  • OpenAI and model partners still control core performance and pricing leverage.
  • Thomson Reuters, LexisNexis, and CoCounsel can turn Harvey into a feature, not a platform.

What makes Harvey unique

  • Harvey II bundles drafting, review, memory, and vault search in one workflow.
  • PacerPro integration on August 21, 2026 streams live docket data into Harvey.
  • Avvoka partnership on August 20, 2026 embeds firm-approved templates directly inside Harvey.

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Benefits

Relocation Assistance

Growth & Insights and Company News

Headcount

6 month growth

-5%

1 year growth

-6%

2 year growth

-1%
Harvey
Sep 9th, 2026
Harvey Raises $550M at a $15.5B Valuation to Help Legal Teams Own Their Intelligence

Harvey is the platform built to meet the standards of the world’s leading professional service firms.‌

The Next Web
Sep 9th, 2026
Harvey closes $550M round at $15.6B valuation and acquires Guardrails AI

Harvey has closed a $550 million funding round at a $15.6 billion valuation and acquired AI agent security startup Guardrails AI. The round was co-led by Lightspeed Venture Partners and Diffusion, with participation from Sapphire Ventures and Whale Rock Capital Management. The legal AI company has raised more than $1.5 billion total, making it the most valuable and best-funded firm in its sector. Annual recurring revenue has surpassed $400 million, whilst the customer base has grown to over 3,000 organisations, up from 1,300 in March. Harvey recently released Tenet, its first fine-tuned legal model, built on Moonshot AI's Kimi K3. The company routes tasks to the cheapest capable model rather than using one model for every request. This is Harvey's fourth acquisition this year, with terms undisclosed.

Bloomberg
Sep 9th, 2026
Harvey valued at $15.6B after raising $550M to build proprietary AI models

Legal tech startup Harvey has reached a $15.6 billion valuation after raising $550 million in its latest funding round. The company plans to use the capital to develop its own AI models. Harvey provides AI-powered tools for legal professionals. The substantial funding reflects growing investor confidence in specialised AI applications for professional services. The new valuation marks significant growth for the startup, which operates in the legal technology sector. The company is focusing its resources on building proprietary artificial intelligence technology rather than relying solely on third-party models.

Harvey
Sep 2nd, 2026
Macpherson Kelley rolls out :Harvey: firmwide.

Macpherson Kelley rolls out :Harvey: firmwide. by Harvey Team - Sep 2, 2026 Macpherson Kelley, a leading Australian commercial law firm with a 121-year history, is deploying Harvey firmwide across its lawyers and all eight practice groups. The firmwide rollout follows a year-long pilot and comprehensive evaluation of legal AI platforms. Macpherson Kelley selected Harvey for the strength of the platform and its approach to implementation and adoption, with Harvey's teams working closely alongside the firm's lawyers and leadership throughout the evaluation. During the pilot, Harvey's Customer Success and Legal Engineering teams worked onsite with Macpherson Kelley across Australia to identify high-impact use cases and develop workflows tailored to its practices. With the firmwide rollout, the teams will build on that foundation, expanding how Harvey supports the firm's lawyers across litigation, drafting, review, and other complex legal work while helping them deliver greater value for clients. "We spent a year evaluating Harvey with our lawyers and testing it against the alternatives before making the decision to go firmwide," said Grant Guenther, National Managing Principal at Macpherson Kelley. "What stood out was not only the strength of the platform, but the partnership behind it. Rolling out Harvey across the firm is an investment in our people and in how we continue to strengthen the service we deliver to our clients." "Macpherson Kelley approached this decision with tremendous thoughtfulness, taking the time to understand where Harvey could have the greatest impact across its practice," Ashleigh Whittaker, Australian Country Manager. "We're proud to support the firm as it brings Harvey to every lawyer and look forward to building on the strong relationship our teams have developed."

Harvey
Sep 1st, 2026
Introducing Horizon Scanning.

Introducing Horizon Scanning. Horizon Scanning helps legal teams monitor, assess, and take action on the changes that matter most. by Harvey Team - Sep 1, 2026 The pace of regulatory change isn't slowing down: 63% of legal departments say their monitoring and compliance workloads increased in 2026. Many existing monitoring tools don't even save teams time because alerts arrive through fragmented feeds, without prioritization, and siloed from where next steps need to happen. Changes can slip through, and it can be costly to miss a key update. Harvey is introducing Horizon Scanning in Harvey to help legal teams turn monitoring into actionable next steps. Teams can customize alerts, receive notifications for key regulatory and legislative updates, and immediately take action on the most impactful developments in one connected platform. Built with a cohort of design partners across law firms and in-house teams, Horizon Scanning helps legal teams quickly act on the changes that matter most. Create tailored scans relevant to you. Most monitoring tools draw from a fixed repository, which means coverage may be rigid or irrelevant to what your business prioritizes. With Horizon Scanning in Harvey, teams can simply describe what they need to track in plain language - a topic, a region, a named regulator. Harvey will automatically build a scan, drawing on more than 12,000 sources across 100+ jurisdictions alongside public sources the user describes. For example, an in-house team can shape the scope of a scan to data protection developments in the jurisdictions where the company actually holds data, or create a separate scan for each subsidiary. Quickly identify which changes matter most. Every scan feeds a single dashboard that shows what moved, with the most consequential developments surfaced first. Determining what changed is just the first step - the critical work is understanding who it affects, what they need to do, and by when. Each update arrives with a relevance assessment, so that it is easy to gauge urgency before digging into the details. Teams can also receive email digests of daily changes, helping them access insights directly in their inbox. Let's say there's a new anti-money laundering rule that impacts a financial services legal team. They can find out about the change the same day it's published via an email alert. Then, Harvey can help them quickly determine which entities are impacted, what has to change operationally, and how long they have to prepare. Move from update to next step. Since Horizon Scanning is part of Harvey's agentic platform, alerts connect to downstream work in one single system. Ask a question about a development in plain language and get an answer grounded in the source. Teams can turn scans into a memo revision, a recommended policy update, or an interactive timeline of upcoming obligations without leaving the dashboard. For a firm's privacy practice, that can mean tracking data protection regulators across member states, updating guidance by directly pulling the right documents from their DMS into queries, and drafting a client alert the same day new guidance lands. For an in-house compliance team, it can mean Harvey directly flagging which internal policies are affected by a tariff change and suggesting revisions, helping them draft new guidelines and flag any operational concerns faster. Scans can be shared across a team, so practice groups and business stakeholders work from the same view. Harvey is building Horizon Scanning as a foundation for proactive legal work in Harvey, where monitoring, analysis, and the work that follows all live in one place. Horizon Scanning is currently available in Early Access for Harvey customers, with general availability to follow. If you're interested in learning more about Harvey, get in touch with its team. Contact Harvey. Yes, I would like to receive marketing communications regarding Harvey's products, services, and events. I can unsubscribe at any time