
Crosby is an agentic law firm built for execution, leveraging lawyer-assisted AI to review various legal documents like MSAs, DPAs, and NDAs in under an hour. They aim to accelerate growth for…

Crosby is an agentic law firm built for execution, leveraging lawyer-assisted AI to review various legal documents like MSAs, DPAs, and NDAs in under an hour. They aim to accelerate growth for…
What they do: Agentic/hybrid AI-powered law firm that uses lawyer-assisted AI to review contracts rapidly
Founded: 2024 (operating in stealth from Jan 2025; public launch in 2025 reported)
Funding: Seed led by Sequoia (~$5.8M); later reported Series A (~$20M) with Index Ventures and Bain Capital Ventures
Pricing model: Upfront, fixed pricing per document (not hourly)
Contract review and negotiation; legal operations for startups and fast-growing companies
2024
Data and Analytics
5.8M
Seed round reported at $5.8M
20M
Series A reported in October 2025
“Backed by top-tier investors including Sequoia Capital, Index Ventures, and Bain Capital Ventures; participation from notable angel investors”
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About Crosby AI Crosby is an AI-first legal platform reimagining corporate legal services from the ground up. We are a team of technologists and legal experts who build proprietary technology and human-in-the-loop workflows that meaningfully improve how lawyers and machines work together — delivering speed, consistency, and quality across high-stakes work.
Our systems review complex documents faster and with exceptional accuracy, combining advanced AI with structured legal expertise. Clients receive AI-powered redlines, commentary, and negotiation guidance within hours, at a predictable, volume-based price.
Backed by Sequoia, Index Ventures, and Bain Capital Ventures, we're building the end-to-end contracting platform for the next generation of fast-growing companies.
The Team The Engineering team builds the core systems, infrastructure, and developer tooling that power Crosby’s AI-first platform. We work across backend, frontend, and AI systems to enable fast iteration, high-quality outputs, and reliable production systems.
We prioritize speed, leverage, and strong engineering foundations — investing in systems that make the entire team more effective.
The Role As an AI Developer Experience Engineer at Crosby, you'll play a critical role in building the internal systems that enable our team to develop, evaluate, and ship AI features quickly and reliably. You’ll focus on improving the developer experience around LLMs, data, and experimentation — creating tools and infrastructure that accelerate iteration while maintaining quality.
You’ll partner closely with engineers, data scientists, and researchers to streamline workflows across prompting, evaluation, fine-tuning, and deployment. This role is for someone who is obsessed with leverage — building systems that make other engineers dramatically more productive.
Responsibilities
Who You Are
Equal Opportunity Crosby is an equal opportunity employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, reproductive health decisions, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, political views or activity, or other applicable legally protected characteristics.
Background checks for applicants will be administered in accordance with applicable law, and qualified applicants with arrest or conviction records will be considered for employment consistent with those laws, including the New York City Fair Chance Act.
Pursuant to New York Labor Law Section 194-b, the US Pay Range for this position is listed below. Final compensation will be determined based on skills, experience, and qualifications.
Compensation Range: $180k–$250k Compensation Range: $180K - $250K
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