Role Overview As a Fullstack Engineer at Harvey, you’ll own end-to-end product experiences that bring advanced AI capabilities to life for enterprise and legal customers. You’ll design intuitive UIs, build the backend systems behind them, and shape how users interact with LLMs and agentic workflows at scale. This is a high-impact role where the features you ship directly influence how global organizations adopt AI in mission-critical workflows—and where you’ll have significant autonomy to define architecture, UX patterns, and the overall product direction. What You'll Do Collaborate closely with Product to prioritize customer-focused work and deliver reliable features quickly in a fast-moving environment. Build end-to-end product features across the stack using React/TypeScript on the frontend and Python-based services (e.g., FastAPI/Flask) on the backend. Implement product workflows that use LLMs and agentic tools behind the scenes, wiring robust backend orchestration into intuitive UIs. Design and maintain clear, versioned API contracts and data models backed by Postgres and other data stores where they add performance or reliability. Ship secure, multi-tenant, permissions-aware features suitable for large enterprise and sensitive legal use cases. Add meaningful logging, metrics, and basic tracing for the features and services you own, and participate in the on-call rotation. Collaborate closely with product and design to scope projects, iterate quickly on UX, and continuously refine shipped features based on customer feedback. What You Have 6+ years of experience in product-focused fullstack engineering roles building modern web applications or SaaS products. Proficiency in Python and a modern web framework (e.g., FastAPI or Flask), plus solid understanding of RESTful API design and common backend patterns. Hands-on experience with relational databases (e.g., Postgres) Strong experience with React and TypeScript, and a track record of shipping polished, responsive UIs with good component structure and attention to UX details. High ownership, clear communication, and the ability to turn ambiguous product requirements into simple, performant, and maintainable solutions in a fast-paced environment. Experience building for Cloud Infrastructure such as Azure, AWS, or GCP. Nice to have: experience integrating frontends and backends with LLM or ML services, or building complex workflows for enterprise or security-sensitive products.

About Harvey

Harvey is domain-specific AI for legal and professional services. Adopted by Fortune 500 companies like AT&T, Verizon, Cox, Koch, KKR, Bridgewater, more than 100,000 lawyers across 1,400+ customers in 60 countries and over 60% of AmLaw 100 law firms rely on Harvey to advance legal expertise faster across contract analysis, due diligence, compliance, and litigation. Backed by Sequoia Capital, OpenAI, GV, Kleiner Perkins, Coatue and EQT, Harvey is the trusted partner in modernizing the legal industry.