Trainline
Senior Engineer - Platform
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Senior Platform Engineer – Infrastructure Engineering and Tooling (Atlas) 🚄
About Trainline
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 via our highly-rated mobile app, website, and B2B channels.
🔥 Did you know?
- Now Europe’s #1 downloaded rail app, serving 135M+ monthly visits
- £6.3B+ in annual ticket sales
- Collaborates with 270+ rail and coach companies across 40+ countries
We are a FTSE 250 company driving innovation with 1,000+ Trainliners from 50+ nationalities, based in London, Paris, Barcelona, Milan, Edinburgh, and Madrid.
The Role
Join the Infrastructure Engineering and Tooling (Atlas) team—a collaborative group of software engineers and platform engineers working on scalable, reliable, and secure infrastructure for Trainline’s platform.
You’ll work alongside Tech Leads, Engineering Managers, and Senior Principal engineers to improve our infrastructure while ensuring automation, security, and high-performance delivery.
Key Responsibilities
Platform & Infrastructure Engineering
- Deliver complex improvements to Trainline’s engineering platforms, ensuring scalable, reliable, and secure infrastructure.
- Implement and evolve Terraform-based infrastructure while improving quality, maintainability, and automation (following existing module patterns).
- Apply secure-by-default and least-privilege principles across AWS accounts, aligning with Trainline’s security and operational standards.
- Build or contribute to automation scripts and tooling using Node.js or Python to support faster, safer, and repeatable deliveries.
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Collaboration & Mentorship
- Support and review mid-level engineers, sharing context, providing feedback, and fostering confidence in delivery.
- Work with Tech Leads, Delivery Managers, and cross-functional stakeholders to shape delivery plans, set milestones, and manage dependencies.
- Identify risks, blockers, or quality concerns early, keeping deliveries on track.
CI/CD & Production Readiness
- Test, validate, and deploy infrastructure changes via CI/CD pipelines, ensuring deliverables are production-ready, documented, and robust.
Requirements & Qualifications
We’d love to hear from you if you have:
✅ AWS Expertise
- Strong experience with ECS, Lambda, IAM, or CloudFront, with a deep understanding of security and operational best practices.
✅ Terraform Proficiency
- Proven experience deploying infrastructure changes in large-scale or complex cloud environments.
✅ Independent Problem-Solving & Collaboration
- Can work autonomously on platform engineering challenges while mentoring teams through clear communication.
✅ Automation & Scripting Skills
- Experience using Node.js or Python for scripting, integration, or tooling, prioritising clean, maintainable solutions.
✅ Secure Cloud Design Knowledge
- Understanding of least privilege, account structure, and service-to-service authentication (e.g., OIDC).
✅ AI & Engineering Tooling
- Experience leveraging AI tools (e.g., for coding, research, or productivity improvements).
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✅ Agile & Delivery Track Record
- Proven success in agile teams, raising risks, clarifying priorities, and driving progress toward milestones.
🔜 Bonus Experience
- Multi-account/region AWS management, CDN/WAF, Git-based CI/CD, or enterprise-scale cloud environments.
Why Join Us?
Trainline isn’t just a job—it’s a journey. Experience:
💼 Fantastic Benefits
- Private healthcare & dental insurance
- Generous work-from-abroad policy
- 2-for-1 share purchase plans
- EV Scheme (furthering sustainability efforts)
- Extended festive leave
- Family-friendly benefits
🚀 Career Growth
- Clear career paths, transparent pay bands
- Personal learning budgets
- Regular learning days
🏢 Work Model
- Hybrid-first approach (60% office presence over 12-week periods)
- 28-day Work-from-Abroad policy
Our Values 🤝
We live by these guiding principles: 💭 Think Big – We’re building the future of rail. ✔️ Own It – Every customer, partner, and journey matters. 🤝 Travel Together – One team, one mission. ♻️ Do Good – We make a positive impact.
Diversity, Belonging & Identity
We prioritise diversity—gender, ethnicity, sexuality, disability, nationality, and thought diversity—because a rich team makes us richer.
Here at Trainline, everyone belongs, and differences are celebrated.
Ready to become a Senior Platform Engineer at Trainline? 🎉 Check us out on LinkedIn | Instagram | Glassdoor and join us in making travel seamless, eco-friendly, and affordable for all.
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