Founding Full-Stack Engineer ($180K–$250K + Equity) AI-Native Law Firm

CoffeeSpace; San Francisco (CA); On-site; USD 180,000 - 250,000; Full time

Benefits offered by this job

Equity

Job summary

CoffeeSpace is recruiting a founding Full-Stack Engineer to join a small, high-impact team in San Francisco. You will ship agentic systems and tools that lawyers use daily, building from PostgreSQL and Node.js backend to React/Next.js frontend, and crafting integrations with Slack, email, and e-signature services.

Ideal candidates have 3–7 years of full-stack experience and fluency in TypeScript, Next.js, React, tRPC, PostgreSQL, AWS, and Temporal.

Qualifications

• 3–7 years of experience in full-stack development.
• Proficiency in TypeScript, Next.js, React, and Node.js.
• Experience with PostgreSQL, AWS, and Temporal.
• Ability to work across the stack from database to UI.

Responsibilities

• Build and ship agentic systems end-to-end for legal workflows.
• Develop full-stack features from database to client UI.
• Create integrations with Slack, email, and document/e-signature services.
• Improve observability and reliability at scale.
• Collaborate with lawyers to scope problems and iterate quickly.

Skills

TypeScript

Next.js

React

tRPC

Node.js

PostgreSQL

AWS

Temporal

Full-stack

Job description

This role is being recruited by CoffeeSpace on behalf of an anonymous AI-native law firm building agentic systems for legal services.

We’re identifying a small number of exceptional founding full-stack engineers from our network. If there’s a strong fit, we’ll introduce you directly to the founding team.

Compensation: $180K–$250K base + 0.1–0.6% equity

Employment type: Full-time

About the company

This company is an AI-native law firm that uses in-house built tools to deliver better legal services for fast-growing tech companies. The firm has handled over $2 billion in contracts across more than 100 companies. It was founded in 2024 and has raised $9 million in seed funding from notable investors including YC and founders of Reddit, Instacart, Cruise, Dropbox, Gusto, and Runway.

The team is small, consisting of 5 members, and includes an ex-OpenAI advisor, a Harvard-trained lawyer, and an MIT graduate who has scaled machine learning to hundreds of millions of users.

About the role

As a Founding Full-Stack Engineer, you will join a high-impact engineering team and work across the entire stack, from PostgreSQL and Node.js on the backend to React and Next.js on the frontend. You will be responsible for shipping agent harnesses, UIs, and integrations that lawyers use daily.

What You’ll Do

• Build and iterate on agentic systems end-to-end, ensuring reliability for legal sign-off.
• Ship full-stack application features from database to UI, including client-facing surfaces and lawyer workspace tools.
• Develop integrations with platforms like Slack, email, and document/e-signature services to automate legal workflows.
• Enhance observability, evaluations, and infrastructure to ensure agents are trustworthy and reliable at scale.
• Work directly with lawyers to scope problems, ship solutions, and receive immediate feedback.

Why This Role Is Compelling

• Join a founding-level role with significant equity at a company where your work will materially shape outcomes.
• Work in a dynamic environment directly with end-users, allowing for rapid iteration and feedback.
• Be part of a small, high-impact team with the opportunity to shape a product from its earliest stage.

The Ideal Candidate

• 3–7 years of experience in full-stack development.
• Proficiency in TypeScript, Next.js, React, tRPC, Node.js, PostgreSQL, AWS, and Temporal.
• Strong ability to work across the stack, from database to UI.
• Comfortable working on-site in San Francisco.

This is a real, active role that CoffeeSpace is recruiting for in close partnership with the hiring team. We don’t post speculative roles and work directly with teams on their actual hiring needs.