Data Engineer - Legal Data AI Processing

Salary: CHF 100’000 - 140’000 per year

Requirements:

• Minimum qualifications
• - Degree in Computer Science, Data Science, or a related field; or equivalent practical experience
• - Strong hands-on experience in data engineering with TypeScript
• - Solid grasp of data structures, algorithms, regexes, and SQL (PostgreSQL)
• - Experience using LLMs/embeddings for practical data tasks (chunking, tagging, summarization, RAG-ready pipelines)
• - Ability to learn quickly and adapt to a dynamic startup environment, with strong ownership and product mindset
• - Availability full-time. On-site in Zurich at least two days per week (hybrid).

Responsibilities:

• Build and own data flows that make AI features accurate, explainable, and scalable
• Design and maintain ingestion for legal sources (APIs, scraping, bulk data) across jurisdictions with strong reliability and compliance
• Normalize and model heterogeneous sources into pragmatic, typed schemas (statutes, decisions, commentaries, citations, metadata)
• Implement citation-aware chunking, sectioning, and cross-referencing so RAG is precise, traceable, and cost-efficient
• Build enrichment pipelines for tagging, classification, summarization, embeddings, entity extraction, and graph relationships; using AI where it helps
• Improve search quality via better indexing strategies, analyzers, synonyms, ranking, and relevance evaluation
• Establish data quality, lineage, and observability (QA checks, coverage metrics, regression tests, versioning)
• Optimize performance, runtime complexity, DB query times, token usage, and overall pipeline cost
• Collaborate closely with users and customers to translate user problems and company requirements into robust data and SLAs
• Communicate your work and findings to the team for continuous feedback and improvement (in English)

Technologies:

• AI
• Azure
• CI/CD
• Docker
• NestJS
• Playwright
• PostgreSQL
• SQL
• TypeScript
• Cloud

More:

- Position: Data Engineer - Legal Data AI Processing
- Department: Engineering
- Status: Open
- Location: Zurich

About You
Are you excited about turning messy, multi-jurisdiction legal content into clean, structured, and AI-ready data? Do you enjoy building reliable pipelines for extraction, normalization, chunking, citation handling, tagging, structuring, summarizing, and indexing; then measuring quality and cost? Do you thrive in a fast-paced startup where your work directly powers search, AI answer quality, and analytics? If so, wed love to hear from you!

About Omnilex
Omnilex is a young dynamic AI legal tech startup with its roots at ETH Zurich. Our passionate interdisciplinary team of 10+ people is dedicated to empowering legal professionals in law firms and legal teams by leveraging the power of AI for legal research and answering complex legal questions. We already stand out with our strong data engineering, including our combination of external data, customer-internal data and our own innovative AI-first legal commentaries.

Benefits
- Direct impact: your pipelines immediately improve search, answers, and user trust, transforming legal research
- Autonomy & ownership: Own across ingestion, processing, enrichment, and indexing
- Team: Professional growth at the intersection of legal, data, and AI with an interdisciplinary team
- Compensation: CHF 8000–12000 per month + ESOP (employee stock options), depending on experience and skills.

Were excited to hear from candidates who are passionate about data engineering and eager to make an impact in the legal tech space. Apply today by pressing the Apply button.

last updated 9 week of 2026