Senior Software Developer

Senior Software Engineer (Contract) 6-Month Engagement | Outside IR35 | Up to £475 per day | Hybrid (London / Ipswich) A rapidly expanding SaaS company is seeking an experienced Senior Software Engineer to support their agile delivery team on an initial 6-month contract. This position offers a strong mix of hands-on development and strategic input, with the opportunity to shape system architecture, influence engineering practices, and contribute directly to product evolution. You'll play a key role in designing, building, and improving scalable cloud-native applications, while also guiding team members and promoting high standards across the development lifecycle. Core expertise required: Advanced experience with C# and .NET (Framework and Core) Frontend development using TypeScript, HTML, CSS, and either React or Vue Proven track record with AWS, ideally including serverless architectures (e.g., Lambda) Experience with CI/CD pipelines and Infrastructure as Code (Terraform or CDK) Strong grounding in clean architecture, SOLID principles, and code maintainability Knowledge of API integration and secure development practices (OWASP)What you'll be doing: Delivering end-to-end software solutions in a modern tech stack Working closely with product managers, QA, and engineering leadership Conducting code reviews and providing mentorship to developers Maintaining and enhancing live systems, with a focus on continuous improvementDesirable (but not essential): Experience with TDD or BDD methodologies Familiarity with PCI or ISO standards Exposure to VoIP technologies Knowledge of Python or AI-related developmentThis role follows a hybrid working model, with occasional travel to London or Ipswich (approximately once per month). An excellent opportunity to contribute to a high-performing team building robust, secure, and scalable SaaS solutions