Senior Cloud Security Engineer

Trainline; London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A leading travel technology company in London is seeking a Senior Cloud Security Engineer to strengthen security across cloud environments. You will design and maintain security frameworks, collaborate with cross-functional teams, and ensure compliance with best practices. The ideal candidate has deep AWS knowledge and experience in networking security. This role offers competitive perks and a focus on career growth.

Benefits

Private healthcare

Generous work from abroad policy

2-for-1 share purchase plans

Family-friendly benefits

Qualifications

• Proven experience in implementing and managing security controls in AWS.
• Solid experience with cloud networking and security configurations.
• Knowledge of compliance frameworks like CIS Benchmarks and AWS Well-Architected Framework.

Responsibilities

• Maintain robust security frameworks for AWS environments.
• Integrate security best practices into CI/CD pipelines.
• Conduct security assessments and help teams respond to incidents.

Skills

AWS Expertise

Cloud Security Experience

Networking Skills

Infrastructure as Code

Security Policy Development

Tools

Terraform

AWS CloudFormation

Docker

Job description

About us:

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 through our highly rated mobile app, website, and B2B partner channels.

Great journeys start with Trainline

Now Europe’s number 1 downloaded rail app, with over 125 million monthly visits and £5.9 billion in annual ticket sales, we collaborate with 270+ rail and coach companies in over 40 countries. We want to create a world where travel is as simple, seamless, eco-friendly and affordable as it should be.

Today, we're a FTSE 250 company driven by our incredible team of over 1,000 Trainliners from 50+ nationalities, based across London, Paris, Barcelona, Milan, Edinburgh and Madrid. With our focus on growth in the UK and Europe, now is the perfect time to join us on this high-speed journey.

Introducing the Trainline Security Team

Join our dynamic team, where we focus on designing, implementing, and monitoring security controls to ensure a robust security posture in a fast-evolving environment. As part of our mission to continuously improve and mature Trainline's security capabilities, we work in close collaboration with cross functional teams, including Cloud Engineering, SRE, Platform Engineering, and more, to integrate the latest technologies and best practices into our security strategy.

You will play a critical role in safeguarding all digital channels that collectively generate billions of pounds in annual ticket sales, ensuring that our systems remain secure, resilient, and innovative in the face of evolving threats.

As a Senior Cloud Security Engineer at Trainline, you will work on...

• Cloud Security Design: Support the design, implementation, and maintenance of robust security frameworks and controls to protect cloud infrastructure in our AWS environment. Ensure that security is seamlessly integrated into every layer of the cloud architecture, from network configuration to identity management.

• Container & Orchestration Security: Partner with Cloud Engineering, DevOps, Platform teams and stakeholders in the deployment of secure containerised environments using platforms like Docker, and ECS. With a focus on vulnerability mitigation, compliance automation, and secure orchestration practices to ensure container workloads are resilient and meet organisational security requirements.

• Security Policy Development & Enforcement: Develop, document, and enforce comprehensive cloud security policies, standards, and procedures that govern cloud infrastructure, services, and containerised workloads. Work collaboratively to integrate security compliance frameworks such as CIS Benchmarks, NIST, and SOC2, ensuring policies are consistently applied across the organization.

• Cloud Migration & Native Infrastructure Support: Provide guidance and hands on support to teams migrating workloads and applications to cloud-native systems, ensuring security considerations are fully addressed throughout the migration lifecycle. Assist in the adoption of best practices for security.

• Security Integration into SDLC & CI/CD Pipelines: Collaborate with teams to integrate security best practices into the software development lifecycle (SDLC) and CI/CD pipelines. Ensure security is prioritised through automation tools, security testing, and vulnerability scanning as part of the continuous delivery process.

• Security Assessments & Incident Response: Conduct security assessments, vulnerability scans and risk analyses to identify and address potential security weaknesses within cloud environments. Support the security operations team in incident response efforts related to cloud security incidents, ensuring timely detection, containment, and remediation.

• Security Support: Provide ongoing cloud security support to Engineering and Platform teams, fostering a security-first culture within the organisation. Ensure that teams are well-equipped to identify, understand, and mitigate cloud security risks and align with established security standards and frameworks.

We'd love to hear from you if you have...

• AWS Expertise & Cloud Security Experience: Proven experience in implementing and managing robust security controls across AWS environments, with a strong understanding of AWS native security best practices. Experience working with web-based Git repositories (e.g., GitHub, GitLab) and cloud services such as AWS Lambda, API Gateway and other serverless architectures to ensure secure configurations and operations. Strong understanding of cloud security frameworks, such as AWS Well-Architected Framework and CIS Benchmarks.

• Networking Skills: Solid experience with cloud networking concepts and services, including configuring and securing Virtual Private Clouds (VPCs), Subnets, Security Groups, and Network ACLs. Expertise in implementing and managing Content Delivery Networks (CDNs), Web Application Firewalls (WAF), and DDoS protection such as AWS shield. Ability to design and enforce security policies that align with best practices for cloud networking and ensure secure application delivery.

• Infrastructure & Compliance as Code: Comprehensive knowledge of Infrastructure as Code (IaC) practices, including the use of tools like Terraform or AWS CloudFormation to automate the provisioning and management of cloudresources. Strong understanding of Policy as Code frameworks such as OPA or AWS config to enforce security policies and compliance requirements automatically across the infrastructure. Experience in advocating for security automation and DevSecOps practices to streamline security governance.

More information:

Enjoy fantastic perks like private healthcare & dental insurance, a generous work from abroad policy, 2-for-1 share purchase plans, an EV Scheme to further reduce carbon emissions, extra festive time off, and excellent family-friendly benefits.

We prioritise career growth with clear career paths, transparent pay bands, personal learning budgets, and regular learning days. Jump on board and supercharge your career from day one!

Our values represent the things that matter most to us and what we live and breathe everyday, in everything we do:

• Think Big - We're building the future of rail

• ️ Own It - We focus on every customer, partner and journey

• Travel Together - We're one team

• ️ Do Good - We make a positive impact

We know that having a diverse team makes us better and helps us succeed. And we mean all forms of diversity - gender, ethnicity, sexuality, disability, nationality and diversity of thought. That's why we're committed to creating inclusive places to work, where everyone belongs and differences are valued and celebrated.

Interested in finding out more about what it's like to work at Trainline? Why not check us out on LinkedIn, Instagram and Glassdoor!