Senior Platform Engineer: Infra, Terraform & Cloud Automation

Remote Worker LTD.; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Private healthcare

Dental insurance

Work from abroad policy

EV Scheme to reduce carbon emissions

Festive time off

Family-friendly benefits

Job summary

Trainline is seeking a Senior Platform Engineer to join the Atlas Infrastructure Engineering and Tooling team. You will build scalable, secure infrastructure and automate delivery across AWS, Terraform, Node.js and Python.

You’ll collaborate with engineers and tech leads to shape plans and ensure reliable production deployments. Hybrid work in London, with at least 60% office presence; you’ll work across Terraform, AWS, and CI/CD pipelines while applying secure-by-default principles and

Qualifications

• Substantial professional experience as a software engineer, coding in Python, Node.js or C# and related languages.
• Strong grounding in software engineering best practices, producing clean, maintainable and testable code.
• Hands-on experience with AWS services like ECS, Lambda, CloudFront, IAM & S3, with security and operations best practices.
• Experience delivering infrastructure with Terraform or other IaC tools.
• Solid understanding of DevOps, CI/CD (e.g., GitHub Actions) and automated delivery.
• Experience using AI tooling to assist coding, reviews or research.
• Experience delivering results in agile, delivery‑focused teams and supporting peers through feedback.
• Curious mindset with ability to learn new technologies quickly.

Responsibilities

• Deliver complex improvements to Trainline's engineering platforms, building scalable, reliable and secure infrastructure.
• Implement and evolve infrastructure with Terraform, following module patterns and improving quality, maintainability and automation.
• Apply least-privilege and secure-by-default principles across AWS accounts and meet security/operational standards.
• Build and improve automation, services and tooling in Node.js or Python to speed up delivery and repeatability.
• Support and review the work of other engineers, providing context and constructive feedback.
• Collaborate with Tech Leads and cross-functional stakeholders to shape delivery plans and dependencies.
• Raise risks and blockers early to keep delivery moving at a sustainable pace.
• Test, validate and deploy infrastructure changes through CI/CD pipelines with robust documentation.

Skills

Python

Node.js

C#

Tools

Terraform

AWS

Job description

Trainline is seeking a Senior Platform Engineer to join the Atlas Infrastructure Engineering and Tooling team. You will build scalable, secure infrastructure and automate delivery across AWS, Terraform, Node.js and Python.

You’ll collaborate with engineers and tech leads to shape plans and ensure reliable production deployments. Hybrid work in London, with at least 60% office presence; you’ll work across Terraform, AWS, and CI/CD pipelines while applying secure-by-default principles and