Data/AI Engineer

About Moonlit

Moonlit is Europe's leading AI-powered legal research platform. From our headquarters in Amsterdam, we build tools that help legal professionals work faster, smarter, and with greater confidence. Think AI-driven assistants, semantic search, and Europe's largest legal database.

Our mission?

Make legal information more efficient, transparent, and accessible: for everyone.

The role

As a Data/AI Engineer at Moonlit, you'll build the data layer that powers our platform used daily by lawyers, judges, and policymakers. Our users are at the highest levels and demand quality. You'll design and implement data pipelines, AI systems, and scalable infrastructure that directly impact how legal information is processed, enriched, and made accessible. We develop enterprise and governmental grade software.

What you will do

• Build and optimize ETL pipelines using Python, PySpark, and Databricks
• Integrate and deploy LLMs from Anthropic, OpenAI, and Google into production systems
• Develop scalable AI APIs using frameworks like Pydantic AI and llama-index
• Work with vector databases and Elasticsearch for semantic search capabilities
• Add new legal data sources and enrich existing datasets
• Optimize existing data pipelines for performance and reliability
• Manage infrastructure across Azure
• Collaborate with platform developers, business stakeholders, and UX professionals

Data & AI ownership

• Responsible for end-to-end data workflows: from ingestion to AI-powered features
• Balance innovation with production-grade reliability and scalability
• Bridge the gap between data engineering, AI research, and product development

Our tech stack

Data & AI: Python, PySpark, Databricks, Pydantic AI, llama-index

LLMs: Anthropic Claude, OpenAI, Google AI

Search & Storage: Elasticsearch, vector databases

Cloud: Azure

Pipeline & Orchestration: ETL workflows, data processing pipelines

Who are you?

• 1-3 years of experience in data engineering, AI engineering, or related fields
• Strong Python skills with experience in PySpark and data processing
• Hands-on experience with at least one major cloud platform (Azure, AWS, or GCP)
• Familiarity with ETL pipelines and data transformation workflows
• Experience working with LLMs and AI frameworks (Anthropic, OpenAI, or similar)
• Understanding of vector databases, embeddings, and semantic search
• Experience with Databricks and/or Elasticsearch is a plus
• A pragmatic mindset: you balance cutting-edge AI with production stability

Why Moonlit?

At Moonlit, your work has real-world impact. The data systems and AI features you build support thousands of legal professionals across Europe and have the potential to help millions gain better access to justice. We're a quality-first, engineering-driven team that chooses scalable, modern, and elegant technologies.

As a Data/AI Engineer, you'll have room to take initiative, experiment with the latest technologies, and grow personally and professionally in a fast-paced scale-up environment. You'll collaborate with talented developers and legal experts in an open culture.

What we offer:

• Competitive salary with equity package in place
• Very nice office with big garden
• Hybrid working (Amsterdam + Remote)
• International, mission-driven work environment