Senior Developer Experience Security Engineer

About Motorway Motorway is the UK's largest online car-selling platform. We connect private sellers directly with over 8,000 dealers nationwide. Our online platform helps sellers achieve great prices for their cars while giving dealers fast, reliable access to the stock they want for their dealerships. Founded in 2017, our award-winning, technology-led approach has redefined the experience of selling a car. Motorway is backed by some of the world’s leading technology investors, having raised £143 million in Series C funding. This is a unique opportunity to join a fast-growing scale-up at a crucial phase of growth and help change an industry for the better. About the role Motorway is rapidly growing its technology team and business, and we are looking for a Developer Experience Security Engineer to help enable a secure, scalable, and frictionless developer experience across Motorway.. We have recently built and rolled out a new container platform on top of AWS Fargate, and are currently enhancing our observability, reliability, and developer-focused tooling. We will continue to build and evolve secure, standardised platform capabilities that reduce cognitive load and help teams ship faster with confidence. As a Developer Experience Security Engineer, you will ensure that security is built into how engineers build, deploy, and operate software, making the secure path the easiest path you will ensure that security is built into how engineers build, deploy, and operate software. The role will involve: Design, implement, and maintain secure-by-default platform capabilities (e.g. IAM patterns, network primitives, secrets management, runtime protections, encryption) that are easy for product teams to adopt. Build automated security checks, guardrails, and visibility that continuously assess risk and reduce the need for manual security audits. Collaborate with engineering to embed secure software development practices into CI/CD pipelines, templates, and shared tooling (Shift left and Secure by design principles). Reduce manual work (toil) for the technology and Security Operations Team using automation (e.g. scripting, workflows, tooling). Ensure platform-level security telemetry, logging, and monitoring are consistent, high-quality, and provided as a standard capability for all teams. Define and implement platform-wide security use cases (e.g. SIEM detections, alerts, and signals) that scale across teams without bespoke configuration Work as part of a virtual SOC with the Security Operations Team to support in security incident response. Stay up-to-date with the latest security trends and best practices. Enable secure engineering practices through documentation, examples, platform defaults, and targeted training where appropriate. Help translate security policies and standards into practical, enforceable platform patterns and guardrails.. Requirements We encourage you to apply, even if you might not meet all the requirements. You’ll be directly reporting to an Engineering Manager, who will help mentor and guide you in your career. Proven experience as a Platform engineer, Developer Experience engineer, or similar role focused on enabling other engineers. Proven experience working with Containers and serverless with Infrastructure as code. Good knowledge of AWS cloud security best practices and tooling Technical knowledge of best practice security for networks, systems, web applications, APIs and databases. Good understanding of secure software development practices. Familiarity with security tools and technologies, such as SIEM, IDS/IPS, WAF and vulnerability scanners. Knowledge of common adversarial Tactics, Techniques and Procedures (Mitre Att&ck TTPs). Knowledge of security standards and frameworks (e.g. ISO27001, NIST CSF, AWS FSBP) is beneficial. Relevant security certifications (e.g. GCLD, Security+, AWS/GCP Security Certifications) are a plus. Excellent problem-solving and analytical skills. Strong communication and collaboration abilities BENEFITS We've got your back, in life's biggest moments and the everyday ones too. Competitive salary Equity scheme - we all share in Motorway’s success 25 days holiday Flexible working (2 days a week in our London office, with socials and snacks galore) Private medical insurance via BUPA Life assurance Pension scheme (we contribute 5%) Enhanced family leave (e.g. 26 weeks full pay for maternity or adoption) 24/7 Employee Assistance Programme EV leasing scheme Cycle to work scheme Nursery salary sacrifice scheme 1 paid volunteering day a year