What you move
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
What you will bring
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
English (Fluent)
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
Using creativity and initiative to solve problems and achieve goals
The benefits we offer
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.
Uncomplicated approach
Simplicity is at our core. We avoid the unnecessary and focus on what really matters – from overcoming challenges to celebrating our shared successes.
Flexibility and freedom (Office Jobs)
We offer working-from-home options, up to 8 weeks of workation, and every position is possible with an 80% workload.
Rapid growth
With us, growth is a continuous journey. We also support you with EDU Points (CHF 2,000 for employees in Switzerland, EUR 1,600 for employees in Germany, and EUR 700 for our Serbian employees) for your professional development, so there’s no risk of you getting stuck in a rut.
More Benefits Switzerland
25 days of holiday, exclusive employee conditions in our online shop, mobile, internet and TV plans at company rates and many other benefits.
Application and contact details
Carli Connelly
People Attraction & Active Sourcing Specialist