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Senior Machine Learning Scientist (User Modelling/Representation Learning)

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Tripadvisor

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Location:
United Kingdom; Poland

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

Not provided
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Job Description:

About Viator Viator, a Tripadvisor company, is the leading marketplace for travel experiences. We believe that making memories is what travel is all about. And with 300,000+ travel experiences to explore—everything from simple tours to extreme adventures (and all the niche, interesting stuff in between)—making memories that will last a lifetime has never been easier. With industry- leading flexibility and last-minute availability, it's never too late to make any day extraordinary. Viator. One app, 300,000+ travel experiences you’ll remember.

Job Responsibility:

  • The Representation Learning team’s charter is to enable embedding latent representations of entities across our platform. The unique challenges/ opportunities that you would help tackle are embedding entities to understand user behavior across multi-touch fragmented journeys in a continuous cold start setting
  • Get to work on Knowledge Graph Embeddings, Auto-Encoders, Attention etc to enable representing Users and Experiences in a common latent space with application across multiple downstream tasks like Search, Ranking, Notifications etc
  • Design, code, experiment and implement models and algorithms to enhance customer satisfaction, increase supplier value, optimize business results, and ensure infrastructure efficiency
  • Collaborate with product managers and various business stakeholders to ensure top-quality outcomes to meet internal objectives
  • Investigate and adopt innovative concepts that offer tangible benefits

Requirements:

  • 5+ years of hands-on data science experience
  • In-depth knowledge of AI/ML/DL, Statistics, and related open-source libraries
  • Awareness of current ML techniques, keen on self-improvement and striving to solve real-world data challenges
  • Strong skills in SQL and at least one programming language
  • To be comfortable in code reviews, discussing architecture, and collaborating with a multidisciplinary team for regular model deployments
  • Experience in deploying online solutions and analysing real-time results through A/B testing
  • To be passionate about mentoring junior members of the team, and have a strong desire to help us perform to the best of our ability
  • Leadership qualities, autonomy, and team collaboration skills
  • Clear communication skills, awareness of the audience, and proactive sharing of findings. Actively involved in business networking and able to communicate complex ideas across the business simply and effectively

Nice to have:

  • Master's or PhD in Computer Science, Operations Research, Statistics, or related quantitative disciplines
  • Knowledge in (any or all) User Modelling, Representation Learning, RecSys, Large Language Models (LLM)
  • Prior experience in e-commerce or at an Online Travel Agency
What we offer:
  • Competitive compensation packages (routinely benchmarked against the latest industry data), including base salary and annual bonus
  • “Work your way” with flexibility to suit your lifestyle. Viator takes a remote-friendly approach to collaboration across a worldwide team, with the option to join on-site as often as you’d like
  • Flexible schedule. Work-life balance is ingrained in our culture by design. Trust and accountability make it work
  • Donation matching. Give back? Give more! We match qualifying charitable donations annually
  • Tuition assistance. Want to level up your career? We love to hear it! Receive annual support for qualified programs
  • Lifestyle benefit. An annual benefit to spend on yourself. Use it on travel, wellness, or whatever suits you
  • Travel perks. We believe that travel is employee development, so we provide discounts and more
  • Employee assistance program. We’re here for you with resources and programs to help you through life’s challenges
  • Health benefits. We offer great coverage and competitive premiums

Additional Information:

Job Posted:
January 07, 2026

Work Type:
Hybrid work
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