Senior Data Scientist (f/m/d)

About us

Zenjob is an AI-powered flexible staffing platform that has efficiently connected companies and temporary workers since 2015. Companies use our platform to book ready-to-work staff in real time, while students use our app to find part-time jobs that conveniently fit around their studies. Over 40,000 students and 1,000 partner companies from logistics, retail, and hospitality in all major German cities share our belief that good work is not a coincidence. It is the result of innovative technology and genuine commitment. Good work starts here.

The Role

At Zenjob, you’ll work on data products that actually ship and shape how thousands of people find work every day. Your job is to understand how our marketplace behaves, build and deploy models that improve it, and work closely with product and engineering to make sure those models deliver real impact instead of staying in a notebook.

What You Will Be Doing

• Shape product decisions: Data should guide decisions from the start. You will proactively explore our data to identify product opportunities, inefficiencies, and growth levers. You’ll translate complex findings into actionable insights that help PMs and business leaders prioritize what truly matters.
• Forecast marketplace dynamics: Strong forecasting prevents shortages and overbooking. You will model supply and demand patterns using robust time-series and probabilistic methods that support planning and operational decisions.
• Improve matching efficiency: Better matching means higher fill rates, happier customers, and less manual work. You will build and refine ranking and allocation models so the right talent reaches the right job quickly and reliably, whether through ML or other data-driven methods.
• Experiment with confidence: Good experiments beat guesses. You will design and run end-to-end experiments using methods suited for a two-sided marketplace (A/B, quasi-experimental approaches, switchbacks, holdouts) and interpret results with clarity.
• Ship models that matter: Models only matter when users benefit from them. You will own the process of turning analyses or models into production, working with engineering on monitoring, fallback strategies, and safe rollouts.

What You Will Bring

• 4+ years of applied Data Science experience, ideally in marketplaces or other matching-heavy environments
• A curious, proactive, impact-driven mindset with strong business acumen
• Enjoy working in environments where things move fast, priorities evolve, and iteration happens quickly
• Solid ML expertise in scoring, ranking, and optimization techniques used in matching and allocation systems
• Experience building forecasting models using time-series and probabilistic approaches
• Strong experimentation skills, including A/B testing and quasi-experimental methods, with the ability to interpret results clearly
• Proficiency in SQL and Python with the ability to move from exploration to production
• Clear communication and strong product thinking, able to influence decisions and define success metrics

Bonus Skills

• Experience with dbt or data modeling
• Understanding of data pipeline design and collaboration in environments with limited DE support 

What we offer

• Innovative mission: Together we create something new. Work in a dynamic set-up where you learn a lot and your every idea is heard.
• Unique team spirit: We can rely on each other blindly and celebrate all successes together as a team.
• Vacation: Recreation and further education is important, which is why we offer 28 days of paid vacation (increased by 1 day for every 2 calendar years of service with us, up to a maximum of 30 days), 1 day of special leave for community service, 5 days of paid educational leave, and the possibility of unpaid leave
• Hybrid working model: We love our brand new office in Prenzlauer Berg. But sometimes you need a little more flexibility. Zenjob’s flexible working model combines the best of both worlds, so you can work remotely up to 2 days / week (1 day, during the first 6 months, so we can guarantee you the best onboarding).
• Dog-lover: If you have a dog, feel free to bring it with you. We don’t bite and always have a bowl of water in our range of drinks
• Personal growth: Ongoing focus on your personal development (annual training budget of EUR 750, mentoring opportunities, constant career development conversations)
• Healthy mind in a healthy body: With us you will receive a 30 EUR Urban Sports Club grant to keep you fit. In addition, we have a small sports room in the office ourselves.
• Always mobile: You will receive EUR 40 credit per month for NAVIT, a sustainable mobility tool for public transport, bike sharing and much more.
• Legendary Events: Quarterly team events, winter and summer parties, budget for birthdays and anniversaries of our employees

If this sounds good, then we’d love to find out more about you! Apply and send in your application.

🎥 Watch our Office Tour video.

We invite you to visit our careers page, follow our LinkedIn page and connect with us on Instagram.

We are proud to be an equal opportunity employer. We are committed to judging every qualified individual on their ability, regardless of age, gender identity, ethnicity, sexual orientation, disability status, or religion. There is no need to add your photo and age to the application.