The Company Superb opportunity to join a leading financial services client with offices in Edinburgh. This is an initial 6-month contract inside IR35. There will be a requirement to be in the office up to 3-days per week. The Role We are seeking an experienced Security Design Engineer (AppSec) to lead end-to-end security solution design across complex technology environments. You will produce high-quality architecture and design artefacts aligned to business and security standards, influence strategic direction, and provide hands-on application security expertise across large-scale transformation programmes. What you’ll do * Own and deliver secure solution designs, architecture patterns, design decisions, and risk assessments * Partner with enterprise and solution architects to ensure alignment with strategic architecture * Provide technical leadership and act as an AppSec subject matter expert for delivery teams * Design and embed security into modern application stacks and CI/CD pipelines * Present designs and recommendations to design authorities and senior stakeholders * Identify control gaps, define remediation plans, and manage residual risk * Support governance, peer review, and architectural assurance processes What you’ll bring * Deep application security experience across cloud-native, microservices, containerised and Kubernetes environments * Strong expertise in SA...