Senior Engineer - Platform

Stack

Responsibilities

• ▹Deliver complex improvements to Trainline's engineering platforms, helping build scalable, reliable and secure infrastructure
• ▹Implement and evolve infrastructure changes using Terraform, identifying opportunities to improve quality, maintainability and automation
• ▹Apply least-privilege and secure-by-default principles consistently across AWS accounts
• ▹Build or contribute to automation scripts and tooling using Node.js or Python
• ▹Support and review the work of mid-level engineers, sharing context and providing constructive feedback
• ▹Collaborate with Tech Leads, Delivery Managers and cross-functional stakeholders to shape delivery plans and achieve milestones
• ▹Identify risks, blockers or quality concerns early, helping to unblock the team
• ▹Test, validate and deploy infrastructure changes through CI/CD pipelines

Requirements

• ▹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
• ▹Experience using Node.js or Python for automation, scripting or integration work
• ▹A good understanding of secure cloud design, including least privilege, account structure and service-to-service authentication such as OIDC
• ▹Experience using AI tooling to support day-to-day engineering work, such as coding, code review, research or productivity

Soft skills

About the company

Trainline is a champion of rail, building a greener, more sustainable future of travel as Europe's number 1 downloaded rail app. The Atlas (Infrastructure Engineering and Tooling) team owns the ecosystem used to deploy, run and manage traffic across the Trainline platform, currently building its next version with a focus on reliability, quality, automation and secure, scalable delivery.