Senior AI Engineer (Libra - Legal AI Assistant) (m/w/d)

Senior AI Engineer (m/w/d)

As a Senior AI Engineer (m/w/d) at Libra, you will develop and improve core product features. You’ll build end‑to‑end product features leveraging the most advanced LLMs via API, from chat‑based interfaces to complex behind‑the‑scenes integrations.

What You’ll Do

• Design, implement, and maintain AI‑driven product features end‑to‑end using LLM APIs.
• Develop visible chat‑based UX flows and non‑visible AI integrations that power Libra’s core functionality.
• Build and optimize RAG systems, including document parsing, semantic chunking, and retrieval pipelines.
• Build scalable, maintainable backend systems using FastAPI and modern Python tooling.
• Design and implement agent orchestration systems for complex, multi‑step legal workflows.
• Build infrastructure for evaluations and benchmarking, including continuous monitoring and alerting to ensure quality across all AI‑powered features.
• Ensure high security, reliability, and data privacy standards across all systems.
• Collaborate closely with Product and Legal Engineering to rapidly prototype, test, and refine new AI use cases.
• Stay ahead of the curve by exploring new models, tools, and techniques—including AI coding agents like Cursor and Claude Code.
• Contribute to a pragmatic, execution‑focused engineering culture where simplicity and speed matter.

What You Bring

• Deep experience building products that integrate large language models (LLMs) via APIs.
• Proficiency with FastAPI, Python, and common data science packages.
• Strong understanding of software engineering and security best practices.
• Experience with modern AI developer tools (e.g., Cursor, Claude Code, Copilot).
• Experience with TypeScript and front‑end development is a bonus.
• Excellent communication skills in English; German fluency is a plus.
• Entrepreneurial mindset and a deep sense of urgency in achieving goals.
• Self‑starter who enjoys autonomy but thrives in a collaborative team.
• Pragmatic problem‑solving approach focused on impact, not hype.
• Ability to balance trade‑offs between fast, simple solutions and long‑term scalability.

What We Offer

• Permanent employment from day one.
• Remote work & remote flexibility: work remotely up to 3 days per week (home office) and 8 days a month in office.
• Work abroad flexibly: work from anywhere within the EU for up to 20 days within a twelve‑month period.
• 26 vacation days.
• Additional day off per year for volunteer work (Volunteer Day).
• Support for development: e‑learning via LinkedIn, online language training with goFluent, and other training opportunities.
• Modern on‑site office: attractive office in Berlin at the Merantix AI Campus.

All qualified applicants will receive consideration without regard to race, color, religion, sex (including pregnancy, gender identity, transgender status, and sexual orientation), national origin, disability, age, genetic information, veteran status, or any other characteristic protected by applicable law, and we do not tolerate discrimination on any of these bases.