Platform and Security Engineer

MAST

Platform & Security Engineer responsible for maintaining cloud infrastructure and ensuring system reliability at a lending technology company. Focusing on security, compliance, and operational resilience.

Posted 5/15/2026full-timeRemote • 🇬🇧 United KingdomMid-LevelSenior💰 £90,000 - £100,000 per yearWebsite

Tech Stack

Tools & technologies

AWSCloudHerokuLinuxTerraformUnix

About the role

Key responsibilities & impact

Own and maintain cloud infrastructure across AWS and container-based environments
Design, build, and maintain infrastructure using Infrastructure as Code tools such as Terraform
Support with future replatforming and infrastructure modernisation initiatives, including migration from Heroku to AWS container platforms
Manage vulnerability remediation processes including CVE tracking, security patching, and maintaining regular patching cadences
Support operational resilience (OR), disaster recovery (DR), backup strategies, and business continuity planning
Help maintain and improve security and compliance processes aligned with ISO27001 framework
Improve system reliability, scalability, resilience, and performance across the Mast platform
Troubleshoot infrastructure, platform, networking, and security related issues across environments
Contribute to incident response processes and ongoing operational improvements
Build systems and tooling that automate infrastructure management and operational workflows wherever possible
Implement and maintain observability tooling including monitoring, logging, alerting, and tracing
Building tools and platforms that enable product teams to provision resources autonomously (self-service)
Building and maintaining CI/CD pipelines and deployment workflows to improve developer experience and delivery velocity
Introducing guardrails for self-service cloud engineering by development teams

Requirements

What you’ll need

5+ years experience in either platform engineering, cloud infrastructure, SRE, DevOps, or security engineering roles
Strong experience with AWS and container based infrastructure
Experience managing infrastructure using Infrastructure as Code tools such as Terraform
Experience building and operating scalable, reliable production systems
Experience with CI/CD pipelines, deployment automation, and developer tooling
Working knowledge of Linux/Unix systems, networking, and cloud security fundamentals
Experience with observability tooling including monitoring, logging, alerting, and tracing
Experience supporting incident response, operational resilience, disaster recovery, or business continuity processes
Comfortable working across infrastructure, security, reliability, and compliance domains
Comfortable owning operational and infrastructure concerns end-to-end in a fast moving environment
Strong communication skills and ability to collaborate effectively with both technical and non-technical stakeholders
Comfortable using AI tools as part of your development workflow.

Benefits

Comp & perks

Stock Option Plan
25 days holiday + bank holidays
4 - 10 weeks work from anywhere, based on tenure (for UK based roles)
Vitality Health insurance
Pension plan
Equipment budget
Learning & development budget
Cycle to Work Scheme
Monthly team socials + Quarterly Team Meet-ups @ HQ
Digital-first, employee-first company with a flexible working culture + Central London HQ

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

AWSTerraformCI/CD pipelinesLinuxUnixobservability toolinginfrastructure as codecloud securityscalable systemsdeployment automation

Soft Skills

strong communicationcollaborationincident responseoperational resiliencedisaster recoverybusiness continuityproblem-solvingadaptabilitystakeholder engagementend-to-end ownership

Certifications

ISO27001