Contract Cloud Security Engineer - Quant Trading (Inside IR35, Hybrid): This is a unique opportunity for an experienced AWS-focused Cloud Security Engineer to join a leading Quant Trading firm on a contract/interim basis. Effectively a DevSecOps role, the incoming Security Engineer will be responsible for designing, implementing and automating (CI/CD) secure AWS infrastructure, with a focus on system architecture, identity, and network security, ensuring alignment with the fund's security strategy. The role requires deep knowledge of AWS security principles, Terraform, Ansible and security automation.