Software Engineer, Full Stack

Why Harvey

At Harvey, we’re transforming how legal and professional services operate — not incrementally, but end-to-end. By combining frontier agentic AI, an enterprise-grade platform, and deep domain expertise, we’re reshaping how critical knowledge work gets done for decades to come.

This is a rare chance to help build a generational company at a true inflection point. With 700+ customers in 58+ countries, strong product-market fit, and world-class investor support, we’re scaling fast and defining a new category in real time. The work is ambitious, the bar is high, and the opportunity for growth — personal, professional, and financial — is unmatched.

Our team is sharp, motivated, and deeply committed to the mission. We move fast, operate with intensity, and take real ownership of the problems we tackle — from early thinking to long-term outcomes. We stay close to our customers — from leadership to engineers — and work together to solve real problems with urgency and care. If you thrive in ambiguity, push for excellence, and want to help shape the future of work alongside others who raise the bar, we invite you to build with us.

At Harvey, the future of professional services is being written today — and we’re just getting started.

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.

#LI-KV1

Harvey is an equal opportunity employer and does not discriminate on the basis of race, gender, sexual orientation, gender identity/expression, national origin, disability, age, genetic information, veteran status, marital status, pregnancy or related condition, or any other basis protected by law.

We are committed to providing reasonable accommodations to applicants with disabilities, and requests can be made by emailing accommodations@harvey.ai