Member of Technical Staff, Frontend (Staff)

Crosby; New York (NY); On-site; USD 100,000 - 140,000; Full time

Job summary

Crosby in New York City is looking for a Staff Frontend Engineer to lead the user-facing experience of our platform. You will architect scalable frontend systems while translating complex legal workflows into intuitive interfaces.

Your role includes defining patterns, guiding technical decisions, and collaborating closely with product, design, and backend teams. A focus on user experience and a builder mindset are essential in this unique AI-native law firm.

Qualifications

• 6+ years of frontend engineering experience, with proficiency in modern frameworks.
• Experience building interfaces for AI-powered applications.
• Strong design sense and experience with modern design tools.

Responsibilities

• Architect and build the core frontend of the Crosby platform.
• Design and implement intuitive user interfaces for legal workflows.
• Collaborate with backend engineers to design and implement APIs.

Skills

Frontend engineering

TypeScript

React

User empathy

Design tools (ex: Figma)

Tools

Modern frameworks (Vite, TanStack)

Python

Job description

About Crosby

Crosby is built on a simple conviction: a great legal system is the watermark of a great society — and the best legal work comes from combining human expertise with the right technology, not replacing one with the other.

Crosby is the first AI-native law firm, helping ambitious companies like Cursor, Ramp, and Cognition sign commercial contracts faster.

Legal work is both art and science, and we're mapping the frontier between the two — codifying what can be systematized, amplifying human judgment where it matters most. That's why the right way to bring AI into law isn't to sell software and walk away. It's to own the outcome together: higher-quality work, delivered faster. We build proprietary tools and human-in-the-loop workflows that change what's possible for corporate legal teams.

Crosby was founded by Ryan (Stanford Law, Cooley, startup GC) and John (Penn, first X employees at Ramp). We work together, in person, in New York City — because the best ideas still happen in the same room. Help us transform one of society's most important industries.

About the role

As a Staff Frontend Engineer at Crosby, you'll play a critical role in owning and evolving the user-facing experience of our platform. You’ll be responsible for architecting and building scalable frontend systems while translating complex legal and AI workflows into intuitive, high-performance interfaces.

You’ll partner closely with product, design, backend engineering, and legal experts to shape the direction of the product and set the standard for frontend quality. Beyond building features, you’ll define patterns, guide technical decisions, and help elevate the engineering organization as we scale.

What you’ll do

• Define the frontend: Architect and build the core frontend of the Crosby platform using modern Frameworks like React, Vite, and TanStack




• Design the user experience: Design and implement intuitive, high performance user interfaces for complex, data intensive legal workflows




• Prototype and iterate fast: Work closely with product and our in house legal team to rapidly prototype and iterate on user facing features




• Lay the foundation: Establish a maintainable frontend codebase, including our component library and design system




• Collaborate deeply: Work with backend engineers to design and implement APIs that deliver a seamless user experience




• Grow the team: Mentor and help recruit world-class engineers

Who you are

• Experience: 6+ years of frontend engineering experience, with deep proficiency in TypeScript and modern frameworks (e.g., React, Vue, or Svelte).




• User Obsession: A strong sense of user empathy and an obsession with detail in delivering high quality, polished products.




• Builder Mindset: You are excited about the opportunity to create and scale systems from the ground up and make foundational technical decisions




• Collaborative: An effective communicator who excels at working with cross disciplinary teams, especially product, design, and backend




• Ownership: You are driven to take full responsibility for projects from ideation through execution and delivery




• Curiosity: Passionate about learning and experimenting with new technologies to solve complex UI/UX challenges

• Experience building interfaces for complex, AI powered applications or agentic systems




• Strong design sense and experience working with modern design tools (ex: Figma)




• Prior experience working in a fast paced, early stage startup environment.




• Familiarity with Python and our backend stack

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 in the job post. Final compensation will be determined based on skills, experience, and qualifications.