Data Scientist - Search Retrieval (f/m/d) — Galaxus
- Location
- Zürich
- Contract
- full-time
- Posted
- 2 days ago
Role overview
Retrieval is the foundation of every search result.
As a Data Scientist on our Search team, you'll own the algorithms (keyword, vector, and beyond) that surface the right products for every customer query.
Your work has a direct, measurable impact on how customers discover products and experience our shop.
- Retrieval is the foundation of every search result.
- As a Data Scientist on our Search team, you'll own the algorithms (keyword, vector, and beyond) that surface the right products for every customer query.
- Design, build, and improve retrieval passes for our product search, including keyword-based (e.g., BM25) and vector-based (embedding) search
- Develop hybrid retrieval strategies that blend lexical and semantic signals, including candidate merging and score normalization
- mindestens 3 Jahre relevante Berufserfahrung: Search / Information Retrieval / Machine Learning
- Completed degree (university / university of applied science / higher technical college): Data Science / Computer Science / Machine Learning
Main responsibilities
- Design, build, and improve retrieval passes for our product search, including keyword-based (e.g., BM25) and vector-based (embedding) search
- Develop hybrid retrieval strategies that blend lexical and semantic signals, including candidate merging and score normalization
- Continuously improve retrieval systems by evaluating performance and leveraging interaction data from millions of users
- Analyze search logs and user behavior to identify recall gaps, underperforming query segments, and long-tail query issues
- Bring models from prototype to production together with engineers, ensuring low latency and high availability at e-commerce scale
Key requirements
- mindestens 3 Jahre relevante Berufserfahrung: Search / Information Retrieval / Machine Learning
- Completed degree (university / university of applied science / higher technical college): Data Science / Computer Science / Machine Learning
- University degree in data science or a related field (MSc or PhD), as well as at least 3 years of relevant professional experience, ideally with practical experience in search or information retrieval
- Excellent Python knowledge including experience with machine learning libraries such as PyTorch, TensorFlow and scikit-learn
- Experience designing experiments and interpreting metrics for large-scale online systems (A/B testing, offline evaluation)
- Experience in handling large amounts of data, including advanced SQL knowledge and experience with database systems (e.g. BigQuery) for analyzing user interactions
- Experience in the field of MLOps, especially in the deployment and operation of machine learning models in production, e.g. with orchestration tools like Airflow or Dagster
- Solid command of English, both written and spoken; German is a plus
- Pragmatic, product-oriented mindset and good communication skills for working across disciplines
- A willingness to challenge «how things have always been done and propose more efficient, automated or effective solutions
- Values, not empty words: Cooperative, innovative, piratesque, responsible, ambitious – these five values are what we practice and preach.
- Courageous thinking: We encourage everyone to think on their feet, and love it when they come up with bold or edgy ideas.
What the company offers
- Using creativity and initiative to solve problems and achieve goals English (Fluent) Cosa offriamo
Application process
- Application and contact details Carli Connelly People Attraction & Active Sourcing Specialist
Additional details
- Experience in handling large amounts of data, including advanced SQL knowledge and experience with database systems (e.g. BigQuery) for analyzing user interactions
- Solid command of English, both written and spoken;
- Using creativity and initiative to solve problems and achieve goals
Notes and original content
- Experience in handling large amounts of data, including advanced SQL knowledge and experience with database systems (e.g.
- BigQuery) for analyzing user interactions
- German is a plus
- English (Fluent)
- Cosa offriamo
Questions about this listing
What salary does Galaxus offer for this role?
Galaxus lists CHF 73'500 - 111'500 gross per year for this position in Zürich. This is the salary published in the original listing (or, when the employer omits a figure, a realistic estimate for the role and sector) — the calculator on this site converts it to your actual net take-home once cross-border tax and social contributions are applied.
Is this a full-time role, and what type of contract does Galaxus offer?
This listing is a full-time position. The contract type shown here comes directly from the employer's original posting; always confirm exact hours, notice period and probation length with Galaxus during the application process, since these details can vary by role even within the same contract category.
Do I need a cross-border work permit for a role in Zürich?
EU/EFTA residents living in the border zone of the country adjoining Canton Zürich can apply for a G permit; the Swiss employer files it with that canton's migration office after the contract is signed. Border-zone rules and processing times vary by neighbouring country and canton, so confirm the specifics with Zürich's cantonal migration office or with HR during the application.
How do I apply for this position at Galaxus?
Use the "Apply now" button on this page — it links directly to Galaxus's original listing at jobs.migros.ch, so your application goes straight to the employer's own applicant-tracking system. Frontaliere Ticino does not collect or forward applications itself.
