Senior Platform Engineer

London Source: WhatJobs

See advert for pay

Overview

As a Senior Platform Engineer at Trainline, you will help deliver scalable, reliable, and secure infrastructure that serves multiple teams across the business. You’ll evolve our infrastructure with Terraform and cloud best practices, aligning with security-by-default standards. You will mentor mid-level engineers and collaborate with cross-functional stakeholders to shape delivery plans. This role offers a hands-on, impact-driven path within a fast-growing rail tech company focused on greener travel.

Pay / Benefits

private healthcare & dental insurance
work from abroad policy
2-for-1 share purchase plans
EV Scheme to reduce carbon emissions
extra festive time off
family-friendly benefits

Responsibilities

Deliver complex improvements to the engineering platform to support scalable, reliable, and secure infrastructure
Implement and evolve infrastructure changes using Terraform and leverage existing module patterns
Apply least-privilege and secure-by-default principles 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 and foster confidence in delivery
Collaborate with Tech Leads, Delivery Managers and cross-functional stakeholders to shape plans and manage dependencies
Identify risks, blockers or quality concerns early to keep delivery on track
Test, validate and deploy infrastructure changes through CI/CD pipelines with robust documentation and production readiness

Key requirements

Strong experience with AWS services (ECS, Lambda, IAM, CloudFront) and security best practices
Proven experience delivering infrastructure changes using Terraform in large-scale environments
Ability to work independently on complex platform engineering problems while communicating clearly
Experience with Node.js or Python for automation or integration work
Understanding of secure cloud design, least privilege, account structure, and service-to-service authentication (OIDC)
Experience using AI tooling to support engineering work
Track record delivering outcomes in agile, delivery-focused teams
Experience with multi-account/multi-region AWS, CDN, WAF, and enterprise-scale AWS environments