Senior ML Scientist — Discovery & Ranking Lead (Remote)

Tripadvisor; Greater London; Hybrid; GBP 120,000 - 180,000; Full time

Benefits offered by this job

Competitive compensation

Remote-friendly collaboration

Tuition assistance

Travel perks

Job summary

Tripadvisor, Inc. is seeking a Senior Machine Learning Scientist (Viator) in London to lead ML strategy for discovery components such as search, retrieval and ranking. The role focuses on production-grade engineering, rapid prototyping, and translating research into business KPIs like bookings and engagement.

You will mentor junior scientists, work with engineering on infrastructure, and design robust evaluation and guardrails to ensure scalable, reliable ML systems across global products.

Qualifications

• Master’s or Ph.D. in CS, ML, or a highly quantitative field.
• 5+ years of industry experience developing and deploying large-scale ML models.
• Strong ML theory and practical skills in deep learning, feature engineering, and ranking.
• Experience with SOTA architectures, multi-task learning, Content AI stacks, and related technologies.
• Proficiency in Python and DL frameworks; data versioning and experiment tracking.
• Experience with retrieval pipelines, ranking, and graph-based representations is a plus.

Responsibilities

• Lead ML projects within your pod and design custom model components or loss functions.
• Evaluate architectures for trade-offs between accuracy, inference speed, memory usage, and costs.
• Implement rigorous validation, backtesting, and guardrails to prevent data leakage and production regressions.
• Collaborate with Engineering Leads to ensure infrastructure supports model requirements and deployment.
• Mentor mid-level and associate ML scientists, reviewing experiments for rigor and production suitability.

Skills

ML leadership

Python

PyTorch

Production ML

Model deployment

Experiment tracking

Data versioning

Education

Master's or Ph.D. in CS/ML

Tools

PyTorch Lightning

TensorFlow

Job description

Tripadvisor, Inc. is seeking a Senior Machine Learning Scientist (Viator) in London to lead ML strategy for discovery components such as search, retrieval and ranking. The role focuses on production-grade engineering, rapid prototyping, and translating research into business KPIs like bookings and engagement.

You will mentor junior scientists, work with engineering on infrastructure, and design robust evaluation and guardrails to ensure scalable, reliable ML systems across global products.