Front-End Leaning Full-Stack Engineer

Supplied Talent•San Francisco, CA

6d•Hybrid

About The Position

Moritz Legal is building an AI-native law firm, a legal practice designed from the ground up around AI. They started by building AI software for lawyers but realized that even better tools couldn't overcome the misaligned incentives of the billable-hour model. So they became the law firm themselves, using the tools they build in-house to deliver faster, better, and more affordable legal services to fast-growing tech companies. At the core is Moritz, their SaaS platform for legal case management that powers swift document reviews, intelligent drafting, and effortless legal research. They are a small, tight-knit founding team spread across San Francisco, London, and Oslo, backed by $9M in funding. The culture is fast-paced, ownership-driven, and deeply collaborative. We're looking for a front-end leaning full-stack engineer to ship features end-to-end across our Next.js and tRPC stack. This is a greenfield product — no legacy migrations, no tech debt to fight. You'll work directly alongside the founders and our design engineer in London to shape product architecture from day one. A central deliverable of this role is making the app beautiful and fully responsive across mobile, tablet, and desktop.

Requirements

3+ years of full-stack experience building B2B SaaS products, shipping features end-to-end
Proficiency in React, TypeScript, and the Next.js App Router
Experience with tRPC (or similar API layers) and PostgreSQL
Strong responsive/mobile-first design skills with Tailwind CSS
Experience with shadcn/ui, Figma, or design-system collaboration
Testing experience with Vitest, Playwright, or equivalents
Ability to work autonomously in a fast-paced, early-stage environment without detailed specs
A true full-stack, growth mindset — not narrowly specialized in only frontend or only backend

Nice To Haves

Experience building AI chat interfaces or AI-powered products
Prior role at a legal tech company (e.g., Harvey, Spellbook, Norm AI)
Experience at an early-stage startup (seed or Series A)

Responsibilities

Build new features end-to-end across the frontend (Next.js 15, React Server Components) and the tRPC API layer
Own making the app fully responsive across mobile, tablet, and desktop — a central deliverable of the role
Work closely with our design engineer in London to craft beautiful, functional UI using shadcn/ui and Tailwind CSS
Design and build backend functionality: tRPC procedures, data models, and integrations with PostgreSQL
Ensure strong accessibility (WCAG) and quality across browsers
Contribute tests (Vitest + Playwright) and take part in code review