As a senior level .NET Engineer at Trainline you will...

Deliver new functionality or features, using the most appropriate tools & techniques
Ensure quality is at the heart of everything you and your team do
Continuously improve the code base
Keep our customer as the number one priority
Actively identify blockers, boulders, time sinks and waste, and actively attempt to remove them
Make significant contribution to technical decisions
Act as a coach and mentor to others in the team
Take full ownership of the development lifecycle from code to production, including deployment and monitoring
Languages & Frameworks: C# (.NET 6-10)
Databases: DynamoDB, PostgreSQL
Cloud & Infrastructure: AWS Cloud, Docker, Terraform
CI/CD & DevOps: GitHub Actions
Monitoring & Logging: New Relic, ELK Stack

Experience mentoring less experienced engineers and comfortable pair-programming with colleagues
Hands on experience with C# .NET and the 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
Have excellent communication skills

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.
Think Big - We're building the future of rail
️ Own It - We focus on every customer, partner and journey
Travel Together - We're one team
️ Do Good - We make a positive impact

1 The Trainline jobs in England & Wales