Senior UI Engineer (m/f/d) | Legal AI Tech Start-up | Full Remote

AI startup developing Noxtua, Europe's first sovereign Legal AI, born out of research at Oxford University and Imperial College London.
Frontend
Senior Software Engineer
Remote
11 - 50 Employees
5+ years of experience
AI · Legal Tech

Description For Senior UI Engineer (m/f/d) | Legal AI Tech Start-up | Full Remote

Xayn AG, an innovative AI startup born from research at Oxford University and Imperial College London, is seeking a Senior UI Engineer to join their Legal AI Tech venture. The company, which has secured €19.5M in funding, develops Noxtua - Europe's first sovereign Legal AI platform helping lawyers analyze and draft legal documents while ensuring compliance with EU standards.

As a Senior UI Engineer, you'll be part of a dynamic tech team of around 10 people, including 3 Frontend Engineers, UI Designer, AI Engineers, and Backend/DevOps professionals. Working under the leadership of Aurélien, who brings a pragmatic and hands-on approach to frontend engineering, you'll be responsible for developing sophisticated UI components using React and TypeScript, optimizing performance, and implementing pixel-perfect designs.

The role combines technical excellence with real-world impact, requiring expertise in modern frontend technologies and best practices. You'll work with a modern tech stack including React, TypeScript, Node.js, and various testing and collaboration tools. The position offers the flexibility of 100% remote work (for German residents), competitive benefits, and the opportunity to shape the future of legal technology in Europe.

This is an ideal opportunity for a senior frontend engineer who values independence, efficiency, and wants to contribute to a cutting-edge Legal AI platform while working with a team of highly qualified professionals (30% PhDs) in a well-funded startup environment.

Last updated 12 hours ago

Responsibilities For Senior UI Engineer (m/f/d) | Legal AI Tech Start-up | Full Remote

  • Develop UI Components using React, TypeScript, hooks, and responsive design
  • Implement performance optimization through code splitting, lazy loading, and caching
  • Execute pixel-perfect implementation from Figma designs with Tailwind and animations
  • Connect APIs using RESTful services and integrate WASM solutions
  • Write tests using Vitest ensuring clean, functional code
  • Handle end-to-end responsibility from design handover to backend integration
  • Optimize tech stack and codebase for better scalability

Requirements For Senior UI Engineer (m/f/d) | Legal AI Tech Start-up | Full Remote

React
TypeScript
Node.js
JavaScript
  • Working permission in Germany
  • Fluent in English
  • Experience with React, TypeScript, Hooks, Context API, HTML5, CSS3, Web Components
  • Backend integration experience with Node.js, API design, authentication mechanisms
  • Experience delivering results in fast-paced startup environments
  • Experience with technical debt optimization and coding best practices
  • Optional: Familiarity with Webpack, Docker, Git, and CI/CD pipelines

Benefits For Senior UI Engineer (m/f/d) | Legal AI Tech Start-up | Full Remote

  • Flexible working hours (32-40h/week)
  • 26 vacation days plus December 24th & 31st off
  • 100% remote work possible (given German residence)
  • Urban Sports Club Membership discounts
  • Equipment provided (Laptop - Lenovo or Mac, second screen, keyboard)

Interested in this job?

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