Senior Machine Learning Engineer

About the role

As a Senior Machine Learning Engineer, you will design and deliver machine learning models at scale to support Trainline's mission of empowering greener travel choices. You will own the end-to-end delivery lifecycle, shape technical direction, and partner with cross-functional teams to build innovative data products. This role involves providing technical mentorship and fostering a culture of experimentation within the AI and ML community.

Responsibilities

• Work within cross-functional teams alongside data scientists, software engineers, data engineers and product managers
• Design and deliver machine learning models at scale that create measurable impact for the business
• Own the end-to-end machine learning delivery lifecycle, including data exploration, feature engineering, model selection and tuning, evaluation, deployment and maintenance
• Shape technical direction for your area, making well-reasoned architectural and modelling decisions that stand up at scale
• Partner with and influence stakeholders across the business to propose innovative data products
• Build tools, frameworks and libraries that accelerate the delivery of ML products and improve team workflows
• Provide technical mentorship and support the development of less experienced engineers
• Take an active role in our AI and ML community, helping foster a culture of rigorous learning and experimentation

Required skills

• Python
• Pandas
• NumPy
• Scikit-learn
• Statistical methodologies
• Feature engineering
• Spark
• Agile
• CI/CD
• Docker
• Terraform
• MLFlow

Nice to have

• Cloud infrastructure
• NLP
• Large language models
• RAG
• Graph technologies
• GIS

Qualifications

• Advanced degree in Computer Science, Mathematics or a related quantitative discipline
• Equivalent practical experience

Benefits

• Private healthcare
• Dental insurance
• Work from abroad policy
• Share purchase plans
• EV Scheme
• Extra festive time off
• Family-friendly benefits
• Personal learning budgets

About the Company

Trainline is Europe’s leading independent rail platform, helping millions of travellers find and book the best-value rail and coach journeys. The company is dedicated to empowering greener travel choices and creating a positive impact for customers, the business, and the planet.