Senior Software Developer (Contract) 6 Months | Outside IR35 | Up to £475/day | Hybrid (London / Ipswich) We're working with a fast-growing SaaS business looking for a Senior Software Developer to join their agile team on an initial 6-month contract. This is a hands-on role with real influence across architecture, engineering standards, and product delivery. You'll be building and enhancing scalable, cloud-based applications while mentoring others and driving best practices across the team. Key skills: Strong C# / .NET (Framework & Core) TypeScript, HTML, CSS + React or Vue Solid AWS experience (serverless/Lambda ideal) CI/CD pipelines & Infrastructure as Code (Terraform/CDK) Strong focus on clean architecture, SOLID principles & code quality API integrations & secure coding (OWASP)The role: Full lifecycle development in a modern tech environment Collaborating with product, QA, and engineering leads Code reviews, mentorship, and technical leadership Supporting live systems & continuous improvementNice to have: TDD/BDD, PCI/ISO knowledge, VoIP, Python/AI exposure Hybrid working with occasional travel to London or Ipswich (roughly once per month). Great opportunity to join a high-performing team delivering secure, scalable SaaS products...