Senior Engineer - Platform
Trainline
| Company | Trainline |
| Category | Uncategorised |
| Location | London |
| Remote | On-site (inferred) |
| Employment | Not stated |
| Level | Not stated |
| Salary | GBP 80k–90k |
| Posted | 26 Jun 2026 |
| Last verified | 30 Jul 2026 |
| Source | Employer career page (ashby) |
Description
About us
We are champions of rail, inspired to build a greener, more sustainable https://www.thetrainline.com/terms/sustainability-faqs 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 Infrastructure Engineering and Tooling team aka Atlas at Trainline👋
The Infrastructure Engineering and Tooling team, also known as Atlas, owns the ecosystem used to deploy, run and manage traffic across the Trainline platform. The team is currently building the next version of Trainline’s infrastructure platform, with a focus on reliability, quality, automation and secure, scalable delivery.
You will join a collaborative team made up of software engineers and platform engineers across a range of experience levels. The team works across technologies including Terraform, AWS, Node.js, C# and Python, but we do not expect you to know everything from day one. In this role, you will work closely with engineers, Tech Leads, Engineering Managers, Senior Principal and a Head of Engineering to improve our platform and deliver meaningful infrastructure change.
In this role as the Senior Platform Engineer, you will... 🚄
- Deliver complex improvements to Trainline’s engineering platforms, helping us build scalable, reliable and secure infrastructure that supports teams across the business.
- Implement and evolve infrastructure changes using Terraform, following existing module patterns while identifying opportunities to improve quality, maintainability and automation.
- Apply least-privilege and secure-by-default principles consistently across AWS accounts, helping ensure our infrastructure meets Trainline’s standards for security and operational excellence.
- Build or contribute to automation scripts and tooling using Node.js or Python, supporting faster, safer and more repeatable delivery.
- Support and review the work of mid-level engineers, sharing context, providing constructive feedback and helping others deliver confidently.
- Collaborate with Tech Leads, Delivery Managers and cross-functional stakeholders to shape delivery plans, achieve milestones and manage dependencies.
- Identify risks, blockers or quality concerns early, helping to unblock the team and keep delivery moving in a clear and sustainable way.
- Test, validate and deploy infrastructure changes through CI/CD pipelines, ensuring deliverables are robust, well-documented and production ready.
We'd love to hear from you if you have... 🔎
- Strong experience working with AWS services such as ECS, Lambda, IAM or CloudFront, with a solid understanding of operational and security best practice.
- Proven experience delivering infrastructure changes using Terraform, ideally in complex or large-scale cloud environments.
- The ability to work independently on complex platform engineering problems while bringing others along through clear communication and collaboration.
- Experience using Node.js or Python for automation, scripting or integration work, with a focus on practical, maintainable solutions.
- A good understanding of secure cloud design, including least privilege, account structure and service-to-service authentication ap
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