Staff Frontend Engineer

Crosby • New York, NY

3d

About The Position

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 Engineering team builds the core systems and user-facing platform that power Crosby’s AI-first legal product. We work across frontend, backend, and AI systems to deliver fast, reliable, and intuitive experiences in high-stakes environments.
We prioritize speed, ownership, and product quality — holding a high bar for both technical excellence and user experience.
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.

Requirements

• 6+ years of frontend engineering experience, with deep proficiency in TypeScript and modern frameworks (e.g., React, Vue, or Svelte)
• Strong track record of building and scaling production-grade frontend systems
• Exceptional attention to detail and a strong sense of user experience and product quality
• Experience architecting frontend systems and making high-leverage technical decisions
• Comfortable working in fast-paced, ambiguous environments and taking ownership of complex problems
• Strong communicator who can collaborate effectively with product, design, and backend teams
• Proactive, resourceful, and motivated to build high-impact systems from the ground up

Nice To Haves

• Experience building interfaces for complex, AI-powered products or data-intensive applications
• Strong design sense and experience working closely with design systems and tools like Figma
• Experience establishing or scaling a frontend architecture in an early-stage or high-growth environment
• Familiarity with backend systems or full-stack development (e.g., Python, APIs)

Responsibilities

• Own frontend architecture: Design and build scalable, maintainable frontend systems using modern frameworks like React, TypeScript, and related tooling.
• Build exceptional user experiences: Develop intuitive, high-performance interfaces for complex, data-intensive legal workflows.
• Set technical direction: Establish best practices, patterns, and standards for frontend development across the organization.
• Prototype and iterate quickly: Collaborate with product and legal teams to rapidly test, refine, and ship user-facing features.
• Collaborate across teams: Work closely with backend engineers to design APIs and ensure seamless end-to-end experiences.
• Mentor and elevate: Provide technical guidance, mentor engineers, and help raise the bar for frontend engineering at Crosby.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed