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About the Role

The Backend teams at Trainline build the core of Trainline’s world-class product, creating journey search functionality, a secure eCommerce platform, and connecting to over 270 travel operating companies across 45 countries. These teams focus on domains like customer accounts, notifications, journey search, bookings, payments, carrier integrations, and real-time timetable information.

Responsibilities

• Deliver new functionality or features using appropriate tools and techniques
• Ensure quality is central to team activities
• Continuously improve the code base
• Prioritize the customer experience
• Actively identify and remove blockers, time sinks, and waste
• Contribute significantly to technical decisions
• Coach and mentor team members
• Take full ownership of the development lifecycle from code to production, including deployment and monitoring

Requirements

• Experience mentoring less experienced engineers and comfortable pair-programming
• Hands-on experience with C# .NET and its latest features
• Experience collaborating with front-end engineers and other disciplines to deliver end-to-end features and cross-functional epics
• Experience working with identity and authentication systems (e.g., IdentityServer, OpenID Connect, OAuth2)
• Experience designing and maintaining CI/CD pipelines (e.g., GitHub Actions, TeamCity, Spacelift or similar tools)
• Experience with cloud platforms (AWS preferred; Azure or GCP also valuable)
• Hands-on experience with Infrastructure as Code, particularly Terraform
• Strong experience with observability practices (logging, monitoring, alerting)
• Familiarity with tools such as New Relic and ELK stack (or equivalents)
• Curiosity about AI and emerging tools
• Experience supporting production systems and improving reliability
• Strong experience building and operating microservices architectures
• Experience with event-driven systems and asynchronous messaging patterns
• Solid understanding of distributed systems and scalability challenges
• Excellent communication skills

Skills

• C#
• .NET 6–10
• DynamoDB
• PostgreSQL
• AWS Cloud
• Docker
• Terraform
• GitHub Actions
• New Relic
• ELK Stack
• IdentityServer
• OpenID Connect
• OAuth2
• TeamCity
• Spacelift
• Azure
• GCP
• AI

Location

• London
• Paris
• Barcelona
• Milan
• Edinburgh
• Madrid

Work Type

• Hybrid

Experience Level

• Senior

Benefits

• Private healthcare insurance
• Dental insurance
• Generous work from abroad policy
• 2-for-1 share purchase plans
• EV Scheme
• Extra festive time off
• Excellent family-friendly benefits
• Clear career paths
• Transparent pay bands
• Personal learning budgets
• Regular learning days

About the Company

• Trainline champions rail to build a greener, more sustainable future of travel.
• Enables millions of travellers to find and book the best value tickets across carriers, fares, and journey options through its highly rated mobile app, website, and B2B partner channels.
• Europe’s number 1 downloaded rail app, with over 135 million monthly visits and £6.3 billion in annual ticket sales.
• Collaborates with 270+ rail and coach companies in over 40 countries.
• Aims to create a world where travel is simple, seamless, eco-friendly and affordable.
• A FTSE 250 company driven by over 1,000 Trainliners from 50+ nationalities.
• Based across London, Paris, Barcelona, Milan, Edinburgh, and Madrid, with a focus on growth in the UK and Europe.

Equal Opportunity

• Committed to creating inclusive places to work where everyone belongs and differences are valued and celebrated.
• Values all forms of diversity: gender, ethnicity, sexuality, disability, nationality, and diversity of thought.