Senior Backend Engineer – .Net

Company: Trainline
Apply for the Senior Backend Engineer – .Net
Location: London
Job Description:

Responsibilities

  • 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

Tech Stack

  • 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

Qualifications

  • 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

Benefits

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 operate a hybrid model to work 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.

#J-18808-Ljbffr…

Posted: May 12th, 2026