Data Engineer - Fr.8'000 - Fr.12'000 A Month in Zürich

Why Omnilex?

At Omnilex, we’re on a mission to transform the way lawyers work. Our AI-native platform lets legal professionals enhance their productivity in legal research and automate workflows. We collaborate closely with our clients and iterate at a market-leading pace. In a year, we have gone from an early MVP to a product used daily by thousands of legal professionals at our clients in Switzerland, Germany and Liechtenstein - and are now scaling rapidly across Europe.

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.

You’ll be joining a young, passionate, and dynamic team of 14, with roots at ETH Zurich.

Tasks What you'll do

As a Data Engineer focused on AI data processing & integration, your primary focus will be building and owning data flows that make our 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 ithelps 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)

Requirements What you bring

Minimum qualifications

Degree in Computer Science, Data Science, or a related field;

or equivalent practicalexperience

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).

Preferred qualifications

You have a Swiss work permit or EU/EFTA citizenship

Working proficiency in German (much of our legal data is in German) and proficiency in English

Experience with Azure (incl. Azure AI/Cognitive Search), Docker, and CI/CD

Familiar with modern scraping/parsing stacks (Playwright/Puppeteer, PDF tooling, OCR)

Experience with vector indexing, relevance evaluation, and search ranking

Familiar with our stack: Azure / NestJS / Next.Js

Knowledge and experience with legal systems, in particular Switzerland, Germany, USA

Benefits 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 8’000–12’000 per month + ESOP (employee stock options), depending on experience and skills.

We’re excited to hear from candidates who are passionate about data engineering and eager to make an impact in the legal tech space.

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