Data Scientist – AI Search & Ranking
Estimated salary
€5,218 – €7,919per month
Auto-estimated from similar roles, location, experience & market data. Actual pay may vary.
Description
trivago is building the next generation of search capabilities for its hotel metasearch platform, which serves millions of travelers daily. This role focuses on enhancing search with query understanding, semantic retrieval, intelligent ranking, and personalization. You will work across three interconnected problem spaces: query and intent understanding, retrieval and ranking, and the two-sided marketplace. The position involves owning components end-to-end, from problem framing to production deployment, and applying traditional ML, deep learning, and language models to drive measurable business outcomes. The role is based in Düsseldorf and offers a hybrid work model.
Requirements
- 5+ years building and shipping search, ranking, or recommendation systems in production; Master's or PhD preferred, or equivalent demonstrated expertise.
- Deep theoretical knowledge and hands-on experience in at least one of: Learning-to-Rank, retrieval and candidate generation, query understanding and NLP, two-tower architectures, or personalisation; and working knowledge of the others.
- Experience fine-tuning and distilling transformer models for production, building efficient solutions optimized for real-world scale and latency.
- Solid foundation in experimentation, including A/B test design, bias awareness, guardrail metrics, and connecting offline quality to online business outcomes.
- Strong Python and SQL; hands-on with PyTorch or HuggingFace; familiarity with vector search infrastructure, cloud ML pipelines (Vertex AI, Airflow), and GCP.
- Clear communicator, entrepreneurial drive, collaborative mentor, and motivation to make progress in ambiguous problem spaces.
- Outcome-driven: you care about the business impact of your work, not only the sophistication of the model or methodology.
- Hands-on, outcome driven and analytically rigorous; you take ownership end to end, build with quality in mind, and bring academic or professional rigour into real production environments.
- A learning and performance mindset; you set ambitious goals, seek feedback, stay curious, and actively explore how AI tools can enhance your work.
Languages
English
C2 · FluentA1A2B1B2C1C2
Experience Level
InternEntry LevelMid-levelSeniorLeadExecutive
Benefits
Work with petabytes of live travel data in production systems with meaningful scope from day one.
Work that sits at the core of the product, with models and analyses directly shaping marketplace outcomes.
Measured on impact, not sophistication, with end-to-end ownership of your work.
Personalized coaching through Nilo, workshops, educational meetups, conferences, free online learning courses, and access to a fully-equipped campus library.
Daily canteen budget, complimentary snacks and drinks, on-site gym, sports classes, and Urban Sports Club membership.
Visa support, relocation package, interest-free newcomer loan, free language classes, and regular team and company-wide events.
Self-determined vacation (minimum 25 days), flexible working hours, up to 2 work-from-home days weekly, and up to 20 days remote work from other locations per year.
Free access to the Heycare platform for personalized nanny assistance and an on-campus kids room.
💰 Net Salary Calculator
Tax class 1, no church tax
Gross Salary
€78,816/year
€6,568/month
Total Deductions
€31,399
40% effective rate
Net Salary (Take Home)
€3,951/mo
€47,417/year
Deduction Breakdown
🏛️ Income Tax€15,269
🏦 Pension Insurance€7,329
🏥 Health Insurance€6,103
🫶 Care Insurance€1,674
📋 Unemployment Insurance€1,024
🏠 Cost of Living in Düsseldorf
Monthly Essentials
Rent (1BR)
€1150
Groceries
€300
Transport
€78
Utilities
€230
Internet
€38
Lifestyle & Entertainment
Eating Out
€15
Gym/Month
€45
Coffee
€4
Beer (0.5L)
€4
Cinema
€13
Monthly Net Salary:€3,951
Comfortable Living:€1,847
Monthly Savings:€2,104 (53%)
💰
Strong savings potential: You could save €2,104 monthly, which is €25,248 per year.
💡 These estimates are based on average costs in Düsseldorf. Actual expenses vary based on lifestyle, neighborhood, and personal choices. "Comfortable living" includes rent, utilities, groceries, transport, and reasonable dining/entertainment.
Eligible for the EU Blue Card
A salary of €78,822 meets the EU Blue Card minimum of €45,300 (2026).
The EU Blue Card is a residence permit for highly qualified non-EU workers. It offers a fast track to permanent residency and allows family reunification.
Processing
4-12 weeks
Visa fee
€100
Requirements
University degree + Job offer
Also eligible: EU Blue Card (Shortage Occupation) (€41,042+)
Documents needed
Valid passport
Recognised university degree
Employment contract or binding job offer
Proof of salary meeting threshold
Health insurance coverage
Biometric passport photo
📍 Life in Düsseldorf
👥
Population
0.6M
⭐
Quality of Life
8.0
🇬🇧
English Friendly
8.0
💻
Tech Scene
8.0
🌍
International
8.0
🚇
Public Transport
9.0
🚴
Bikeability
7.0
🌬️
Air Quality
6.0
🌳
Green Spaces
7.0
🚗
Car Free
7.0
ℹ️
About Düsseldorf
- •International business hub
- •Strong advertising and fashion industries
🌤️
Climate
- •Temperate oceanic climate
- •Mild winters
- •Warm summers
❄️Jan: 3°C☀️Jul: 19°C📅Avg: 11°C
☀️1600 sunshine hours/year
🛡️
Safety
- •Generally safe
- •Some pickpocketing in tourist areas
Overall:7.0
🏥
Healthcare
- •University hospital
- •Many private clinics
Quality: 9.0Access: 8.0
🎭
Culture
- •Art galleries and museums
- •Japanese cultural center
🎉
Nightlife
- •Famous Altstadt (longest bar in the world)
- •Altbier culture
🏞️
Recreation
- •Rhine promenade
- •Parks and gardens
💰
Cost of Living
- •Expensive city
- •High rents in central areas
🏠 Rent (1BR center):€1150
⚡ Utilities:€230
🛒 Groceries:€300
🍽️ Dining out:€17
Engagement
Views
0today
7 days0
all-time8
Applies
0today
7 days0
all-time0
Part of Collections
Global hotel and accommodation metasearch platform comparing prices from 250+ booking sites across 5+ million properties in 190+ countries. Serving 50+ million monthly users, trivago helps travelers find the best hotel deals through AI-powered search technology. Majority-owned subsidiary of Expedia Group, publicly traded on NASDAQ (TRVG). FY 2025 revenue €548.9M with a return to profitability.
Visa sponsorship available
Relocation support provided
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€2kthis job posts €5k – €8k€20k
Your situation in Germany
The default for anyone single, divorced or widowed.
Only changes the church tax rate — 8% in Bavaria and Baden-Württemberg, 9% everywhere else.
Childless employees over 23 pay a higher Pflegeversicherung (care insurance) rate.