Junior Engineer - .NET Backend (London)

Junior Engineer - .NET Backend (London)

London Full-Time 60000 - 75000 £ / year (est.) Home office (partial)
Trainline

At a Glance

  • Tasks: Join our team to develop innovative backend solutions for a leading rail app.
  • Company: Trainline, Europe's number 1 downloaded rail app, focused on sustainable travel.
  • Benefits: Enjoy private healthcare, flexible work options, and generous learning opportunities.
  • Other info: Diverse, collaborative environment with clear career paths and excellent perks.
  • Why this job: Make a real impact in the future of travel while growing your tech skills.
  • Qualifications: Basic .NET knowledge and a passion for learning are essential.

The predicted salary is between 60000 - 75000 £ per year.

About us
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. Great journeys start with Trainline. 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. Today, we're a FTSE 250 company driven by our incredible team of over 1,000 Trainliners from 50+ nationalities, based across London, Paris, Barcelona, Milan, Edinburgh and Madrid. With our focus on growth in the UK and Europe, now is the perfect time to join us on this high-speed journey.

Introducing the Backend teams at Trainline
The Backend teams at Trainline build the core of Trainline’s world class product. We create the journey search functionality that millions of our customers use on a daily basis, the eCommerce platform that provides a secure and seamless experience and we connect Trainline to over 270 travel operating companies, across 45 countries in Europe and the rest of the world. Each team has a targeted domain focus, ranging between journey search, fares calculation, bookings, fulfilment, payments, refunds, carriers’ integrations, real-time timetable information, journey disruptions and much more.

This Role's Team
The Supply Platform & AI Enablement team sits within Trainline’s Core Experience pillar and plays a critical role in shaping how supply is integrated, managed, and scaled across the Trainline platform. As rail liberalisation accelerates across Europe and new operators continue to enter the market, the team is focused on building scalable, resilient, and future-ready platform capabilities that enable Trainline to onboard and manage supply efficiently across rail and coach markets.

As a junior 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
• Take full ownership of the development lifecycle from code to production, including deployment and monitoring

We'd love to hear from you if you...
• Are early in your career; whether just starting or already possessing a couple of years of experience – we're excited to support your growth!
• Have foundational knowledge of .NET
• Thrive in a diverse, open, and collaborative environment
• Are proactive, focused, supportive, honest, and a team player
• Have a passion to learn new skills and technologies
• Have an appreciation of version control systems
• Understand Agile/Scrum methodology

Bonus points if you...
• Have experience with some of the core programming languages we use such as C# .NET, React, Typescript, Kotlin (Android), Swift (iOS), Ruby.
• Have working knowledge of Git
• Have experience with Unit Testing
• Have understanding or experience working with AWS or similar cloud technologies

Our 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

More information:
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. Jump on board and supercharge your career from day one! 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.

Our values represent the things that matter most to us and what we live and breathe everyday, in everything we do:
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

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. That's why we're committed to creating inclusive places to work, where everyone belongs and differences are valued and celebrated.

Interested in finding out more about what it's like to work at Trainline? Why not check us out on LinkedIn, Instagram and Glassdoor!

Junior Engineer - .NET Backend (London) employer: Trainline

At Trainline, we pride ourselves on being an exceptional employer, offering a vibrant work culture that champions collaboration and continuous improvement. Our commitment to employee growth is evident through clear career paths, personal learning budgets, and generous benefits like private healthcare and a flexible work-from-abroad policy. Join us in Edinburgh, where you can make a meaningful impact on customer experiences while enjoying a supportive environment that values your contributions.

Trainline

Contact Details:

Trainline Recruitment Team

StudySmarter Expert Advice🤫

We think this is how you could land Junior Engineer - .NET Backend (London)

Join Local Tech Meetups

Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Trainline or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!

Contribute to Open Source Projects

Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Trainline.

Tap into Online Developer Communities

Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Trainline.

Explore Job Boards Specifically for Tech Roles

Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Trainline that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!

We think you need these skills to ace Junior Engineer - .NET Backend (London)

.NET
C#
Version Control Systems
Agile/Scrum Methodology
Unit Testing
AWS
Cloud Technologies

Some tips for your application 🫡

Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.

Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Trainline.

Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Trainline and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!

Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!

How to prepare for a job interview at Trainline

Brush Up on Your Coding Skills

For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.

Know Your Tools and Frameworks

Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Trainline uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.

Showcase Your Projects

Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.

Prepare for Behavioural Questions

While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.