MCS Group is working with a very exciting, growing Insurtech company who are expanding their development team. They're seeking an experienced Senior Software Engineer to lead the delivery of innovative, scalable, and secure features across their growing suite of Insurtech products. Reporting to the Principal Software Engineer, you'll play a pivotal role in designing distributed systems, guiding developers, and ensuring engineering excellence across every sprint. You'll collaborate closely with cross-functional teams to translate product requirements into world-class technical solutions that deliver real value. With significant investment on board recently and new products in the pipeline, this is the perfect opportunity for an ambitious .NET developer. Key Responsibilities Collaborate on sprint planning, workload estimation, and technical specification authoring. Deliver high-performance .NET applications that scale and are secure by design. Write, review, and maintain high-quality, clean, and testable code. Implement and uphold automated testing practices (unit, integration, E2E, load, and penetration testing). Ensure production environments run smoothly and assist in incident response when needed (including out-of-hours support on occasion). Contribute to platform architecture decisions and standardisation efforts across teams. Work closely with the Principal Software Engineer to report progress, flag blockers, and share ideas. The Ideal Person 5 years of commercial software engineering experience, with strong system design and architecture exposure. Good knowledge of C# and .NET (ideally .NET 6/7). Strong grasp of design patterns, software architecture, and principles like SOLID, DRY, and clean code. Proven ability to build and maintain scalable, distributed systems. Experience with SQL Server and relational database design. Exposure to NoSQL solutions is a bonus. Understanding of application security, penetration testing, and remediation techniques. Familiarity with CI/CD pipelines, Git-based version control, and DevOps culture. Experience working in cloud platforms such as Azure (preferred), AWS, or GCP. Knowledge of web technologies, HTTP protocols, REST APIs, accessibility, and front-end integration. Exposure to Agile tools and processes (e.g. sprint planning, boards, retrospectives). Previous experience mentoring junior developers or leading small engineering teams. Salary Up to £60,000, with a leading benefits package To speak in absolute confidence about this opportunity, please send an up-to-date CV via the link provided, or contact Matthew Hamill, IT Recruitment Consultant, at MCS Group. Even if this position is not right for you, we may have others that are. Please visit MCS Group to view a wide selection of our current and exclusive roles All conversations will be treated in the strictest of confidence. Skills: .NET Software Developer Software Engineer C# full-stack