Service Designer / UX Researcher in London

We are champions of rail, inspired to build a greener, more sustainable future of travel. Trainline enables millions of travellers to find and book the best value tickets across carriers, fares, and journey options through our highly rated mobile app, website, and B2B partner channels.

Now Europe’s number 1 downloaded rail app, with over 135 million monthly visits and £6.3 billion in annual ticket sales, we collaborate with 270+ rail and coach companies in over 40 countries. We want to create a world where travel is as simple, seamless, eco-friendly and affordable as it should be.

The Enterprise Solutions team sits at the centre of how Trainline powers business partnerships, internal operational tooling, and white-label experiences across Europe’s rail ecosystem. Working across complex B2B and B2B2C products, the team designs and builds the platforms, integrations, and tools that enable Trainline to connect seamlessly with rail operators, travel partners, and internal teams, helping us scale how our products are distributed and experienced.

As a Senior Product Designer, you’ll play a key role across two significant workstreams, shaping both customer-facing and internal experiences that support Trainline’s evolving aggregation and distribution strategy. This is a highly collaborative and strategic individual contributor role where you’ll lead discovery, influence product direction, and bring strong design leadership into cross-functional teams. You’ll work closely with Product, Engineering, commercial stakeholders, and external partners to solve complex problems, deliver high-quality experiences, and help shape how we evolve our design practices, tooling, and ways of working.

In this role as the Senior Product Designer, you will:

• Own the end-to-end design process across two key B2B and B2B2C product areas, from discovery and problem definition through to detailed specification, UI design, and developer handoff.
• Lead collaborative discovery activities including workshops, whiteboarding sessions, rapid research sprints, and cross-functional alignment sessions to ensure teams are solving the right problems before building solutions.
• Design scalable and intuitive experiences for external rail operators, travel partners, white-label platforms, and internal operational tooling used across Trainline.
• Translate complex partner and carrier requirements into clear, developer-ready design solutions that balance business goals, technical constraints, and customer needs.
• Build strong and trusted working relationships with Product, Engineering, commercial teams, and external stakeholders, contributing actively to planning, strategy discussions, and delivery rituals.
• Contribute to the evolution of Trainline’s broader design practice, including experimentation with AI-assisted workflows, tooling, and new ways of working.
• Experience designing complex B2B or B2B2C products, including enterprise tooling, operational platforms, or mobile and web-based experiences with multiple stakeholder groups.
• A systems-thinking mindset and a strong appreciation for scalable design patterns, detailed specifications, logical user flows, and thoughtful handling of edge cases.
• Confidence leading discovery activities and facilitating collaborative workshops that help teams align quickly around problems, opportunities, and priorities.
• Strong communication and stakeholder management skills, with the ability to build trust, influence decisions constructively, and collaborate effectively across Product, Engineering, commercial teams, and external partners.
• Experience using data, experimentation, customer insight, and research to inform decisions and measure the impact of design outcomes.
• The ability to communicate design decisions clearly through compelling storytelling, presentations, and detailed developer-ready specifications.
• Adaptability in evolving environments and an openness to experimenting with new tools and AI-assisted ways of working.

Enjoy fantastic perks like private healthcare & dental insurance, a generous work from abroad policy, 2-for-1 share purchase plans, an EV Scheme to further reduce carbon emissions, extra festive time off, and excellent family-friendly benefits. We prioritise career growth with clear career paths, transparent pay bands, personal learning budgets, and regular learning days. We're operating a hybrid model and ask that Trainliners work from the office a minimum of 60% of their time over a 12-week period. We also have a 28-day Work from Abroad policy.

We know that having a diverse team makes us better and helps us succeed. And we mean all forms of diversity - gender, ethnicity, sexuality, disability, nationality and diversity of thought.