Senior Backend Engineer - .Net

🔒 Confidential Employer
Posted 7 May 2026
LOCATION
London
TYPE
Full-time
LEVEL
Mid-Senior level
SALARY
£95,000 / year
CATEGORY
Software Engineering
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

C# .NET AWS Docker Terraform Microservices CI/CD PostgreSQL Observability

FULL DESCRIPTION

Senior Backend Engineer - .Net

Company: [Employer hidden — sign up to reveal]

Location: London (Hybrid)

Employment Type: Full-time

Salary: £85K – £95K per year

About [Employer hidden — sign up to reveal]

We are champions of rail, inspired to build a greener, more sustainable future of travel. [Employer hidden — sign up to reveal] 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.

Great journeys start with [Employer hidden — sign up to reveal]

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 are a FTSE 250 company driven by over 1,000 [Employer hidden — sign up to reveal] from 50+ nationalities, based across London, Paris, Barcelona, Milan, Edinburgh and Madrid.

The Role

As a senior level .NET Engineer at [Employer hidden — sign up to reveal] you will deliver new functionality, ensure quality, continuously improve code, keep customers as priority, identify blockers, contribute to technical decisions, mentor others, and own the development lifecycle from code to production.

  • Deliver new functionality using appropriate tools
  • Ensure quality at the heart of everything
  • Continuously improve the codebase
  • Keep customer as number one priority
  • Actively identify and remove blockers
  • Make significant contribution to technical decisions
  • Act as coach and mentor
  • Take full ownership from code to production

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

Requirements

  • Experience mentoring less experienced engineers and pair-programming
  • Hands on experience with C# .NET and latest features
  • Experience collaborating with front-end engineers and other disciplines
  • Experience with identity and authentication systems (IdentityServer, OpenID Connect, OAuth2)
  • Experience designing and maintaining CI/CD pipelines (GitHub Actions, TeamCity, Spacelift)
  • Experience with cloud platforms (AWS preferred)
  • Hands-on experience with Infrastructure as Code, particularly Terraform
  • Strong experience with observability practices (logging, monitoring, alerting)
  • Familiarity with New Relic and ELK stack
  • 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
  • Solid understanding of distributed systems and scalability
  • Excellent communication skills

Benefits & Culture

Enjoy perks like private healthcare, dental insurance, work from abroad policy, share purchase plans, EV Scheme, extra festive time off, family-friendly benefits. Career growth with clear paths, transparent pay bands, personal learning budgets, regular learning days. Hybrid model with 60% office time and 28-day work from abroad policy.

Values: Think Big, Own It, Travel Together, Do Good.

[Employer hidden — sign up to reveal] is committed to diversity and inclusion.

Interested? Check us out on LinkedIn, Instagram, and Glassdoor.

Application

Compensation Range: £85K - £95K.

Apply for this job: .

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