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About the Role

The Infrastructure Engineering and Tooling team (Atlas) owns the ecosystem for deploying, running, and managing the Trainline platform. This role involves building the next version of the infrastructure platform, focusing on reliability, quality, automation, and secure, scalable delivery. You will collaborate with a team of software and platform engineers, working with technologies like Terraform, AWS, Node.js, C#, and Python to improve the platform and deliver meaningful infrastructure changes.

Responsibilities

Deliver complex improvements to Trainline’s engineering platforms, building scalable, reliable, and secure infrastructure.
Implement and evolve infrastructure changes using Terraform, identifying opportunities for improvement in quality, maintainability, and automation.
Apply least-privilege and secure-by-default principles across AWS accounts to meet security and operational excellence standards.
Build or contribute to automation scripts and tooling using Node.js or Python for faster, safer, and more repeatable delivery.
Support and review the work of mid-level engineers, sharing context and providing constructive feedback.
Collaborate with Tech Leads, Delivery Managers, and stakeholders to shape delivery plans and manage dependencies.
Identify risks, blockers, or quality concerns early to unblock the team and maintain clear, sustainable delivery.
Test, validate, and deploy infrastructure changes through CI/CD pipelines, ensuring deliverables are robust, well-documented, and production-ready.

Requirements

Strong experience with AWS services (ECS, Lambda, IAM, CloudFront) and a solid understanding of operational and security best practices.
Proven experience delivering infrastructure changes using Terraform, preferably in complex or large-scale cloud environments.
Ability to work independently on complex platform engineering problems while fostering clear communication and collaboration.
Experience using Node.js or Python for automation, scripting, or integration, focusing on practical, maintainable solutions.
Good understanding of secure cloud design, including least privilege, account structure, and service-to-service authentication (e.g., OIDC).
Experience using AI tooling for engineering tasks (coding, code review, research, productivity).
Track record of delivering outcomes in agile, delivery-focused teams, with confidence to raise risks and support shared progress.
Helpful experience with multi-account/multi-region AWS management, CDN, WAF, Git-based CI/CD pipelines, or enterprise-scale AWS environments.

Skills

AWS
Terraform
Node.js
Python
CI/CD
Cloud Security
Automation
Scripting

Location

London
Paris
Barcelona
Milan
Edinburgh
Madrid

Work Type

Hybrid
Remote (28-day policy)

Experience Level

Senior

Benefits

Private healthcare & dental insurance
Generous work from abroad policy
2-for-1 share purchase plans
EV Scheme
Extra festive time off
Excellent family-friendly benefits
Clear career paths
Transparent pay bands
Personal learning budgets
Regular learning days

About the Company

Trainline is a leader in rail travel, committed to building a greener, more sustainable future.
Europe's number 1 downloaded rail app, with over 135 million monthly visits and £6.3 billion in annual ticket sales.
Collaborates with 270+ rail and coach companies in over 40 countries.
A FTSE 250 company with over 1,000 employees ('Trainliners') from 50+ nationalities.
Focuses on growth in the UK and Europe.
Values: Think Big, Own It, Travel Together, Do Good.

Equal Opportunity

Committed to creating inclusive places to work where everyone belongs and differences are valued and celebrated.
Values all forms of diversity including gender, ethnicity, sexuality, disability, nationality, and diversity of thought.