Senior Software Developer (Contract) Duration: 3 monthsRate: Outside IR35Location: 90% Remote (occasional on-site as required) About the Role We are seeking an experienced Senior Software Developer on a short-term contract. This role is ideal for a highly skilled professional who can deliver robust, secure, and scalable solutions with minimal supervision. You will play a key role in designing and implementing API security testing solutions and ensuring best practices across architecture, coding, and documentation. Key Responsibilities Develop high-quality, production-ready code for API security testing solutions, including comprehensive unit and integration tests. Ensure code meets modern best practices and passes all quality checks for automated CI/CD deployment. Produce detailed architectural diagrams, ADRs, design documents, runbooks, and onboarding guides. Implement secure coding practices (OWASP, threat modelling) and ensure resilience and scalability in all solutions. Collaborate on infrastructure automation using Infrastructure-as-Code tools (Terraform, CloudFormation). Manage version control and workflows using GitHub. Contribute to UI development and AWS-hosted environments. Required Skills andamp; Experience Deep expertise in one or more primary languages: React, Node.js, Python, and CI/CD Scripting. Strong knowledge of Infrastructure-as-Code (Terraform, CloudFormation). Proven experience with secure coding practices and threat modelling. Ability to produce high-