Senior Front-end Engineer (Libra - Legal AI Assistant) (m​/f​/d

As a Senior Frontend Engineer (m/f/d), you'll be joining Libra to help legal and compliance professionals enhance productivity, mitigate risk, and solve complex problems confidently. There are hundreds of thousands of lawyers across Europe — and at Libra, we’re transforming how they work.

We’re looking for an exceptional Senior Frontend Engineer to join our fast‑growing engineering team. You’ll be joining at a stage where the product has grown quickly and the frontend is ready for its next chapter — the opportunity to shape structure, raise the bar, and define what mature looks like is wide open. You’ll own significant product surfaces end‑to‑end, lead the consolidation of our component library, and bring your own opinions on architecture, state, and performance to the work.

You’ll build novel UX at the forefront of human‑AI interaction in legal — collaborating closely with our design team and in‑house legal experts to make AI that lawyers actually want to use. This is a role for someone who reads “still maturing” as opportunity rather than red flag — and who wants real ownership over how a fast‑moving legal AI product evolves into something stable, scalable, and a pleasure to build on.

You’ll be part of a highly skilled technology organization and a fast‑growing product organization. An ambitious and thrilling place to be as you’ll be essential to both strategic alignment and local execution. You’ll be working at the vibrant Merantix AI Campus in Berlin, surrounded by a community of AI innovators. We value collaboration, curiosity, and a bias toward action.

• Own significant product surfaces end‑to‑end across our Svelte Kit application — from architecture decisions through to the polish of the final user experience.
• Lead the consolidation of UI patterns into a coherent component library — bringing consistency to an area that’s still finding its shape.
• Drive frontend quality forward — raise the bar on type safety, reduce duplication, and establish patterns the rest of the team can follow.
• Partner with design and UX to evolve the design system and push it through to broad adoption across the product.
• Build novel UX at the forefront of human‑AI interaction in legal — streaming responses, citation rendering, source attribution, and tool‑use surfaces.
• Raise the bar across the team through code review, pairing, and mentoring.

• Education:
  
  Bachelor's degree preferred in Software Engineering or a related technical field.
• Experience:
  
  Minimum 5 years of relevant experience in product frontend engineering.
• Deep proficiency in Type Script and strong experience with Svelte/Svelte Kit — or comparable depth in React or Vue with the willingness to ramp up quickly.
• Solid command of modern CSS and design tokens; experience with Tailwind is a plus.
• Hands‑on experience with real‑time UI patterns — streaming responses, SSE, optimistic updates.
• Proven experience building or significantly evolving a design system or component library.
• Experience using AI coding agents like Cursor or Claude Code.
• Bonus:
  You’ve built UX for LLM‑powered or otherwise non‑deterministic products.
• Bonus:
  Full‑stack experience (especially Python/FastAPI) is a plus, but not required — this is a frontend‑focused role.

• Comfortable bringing structure to an evolving codebase — and you find that energizing rather than off‑putting.
• Entrepreneurial mindset with strong ownership and urgency.
• A pragmatic approach to problem solving.
• It’s more important to you to solve the problem than to use new/hyped technology.
• Strong product sensibility — you own user outcomes, not just shipped tickets.
• Excellent communication in English;
  German is a plus.

This is a hybrid role, where you will spend at least eight…