Senior .Net Developer

MCS Group is partnering with a fast-growing, forward-thinking Insurtech business as they expand their software development team. We're looking for an accomplished Senior .Net Developer to take a key role in delivering high-quality, secure, and scalable features across an expanding range of Insurtech products and applications.

Joining a close-knit technology team, the Senior Software Developer will work closely with the Software Engineering Manager and Principal Software Engineers, helping to shape distributed systems, mentor more junior .Net developers, and champion engineering excellence throughout the development lifecycle. You'll collaborate across product, design, and wider engineering teams to turn requirements into robust, elegant solutions that make a measurable impact. With fresh investment and several new products on the horizon, it's an excellent opportunity for a motivated .NET developer interested in genuine career progression and is ready to make their mark. One of the senior developers we have placed in this team in 2025 has been promoted already, so definitely a culture where hard work is recognised and rewarded!

This is a hybrid position based in Belfast, with free parking.

What you'll be doing

• The Senior Developer will participate in sprint planning, estimate workloads, and produce clear technical documentation.

• Develop high-performance .NET applications (.Net Core) built for scale, reliability, and security.

• Write, review, and maintain clean, testable, and maintainable code.

• Implement automated testing strategies across unit, integration, E2E, performance, and security testing.

• Monitor and maintain production environments, supporting incident response when required (including occasional out-of-hours support).

• Contribute to architectural decisions and drive standardisation across engineering teams.

• Work to support the local leadership to report progress, raise blockers, and share ideas for improvement.

What you'll bring

• You'll have a strong grasp of hands-on software engineering experience, with strong exposure to system architecture and design.

• Proficiency in C# and .NET (preferably .NET Core).

• Solid understanding of design patterns, software architecture, and principles such as SOLID, DRY, and clean code.

• Track record of building and maintaining scalable, distributed systems.

• Experience with SQL Server and relational database design; knowledge of NoSQL technologies is an advantage.

• Understanding of application security, penetration testing, and security best practices.

• Familiarity with CI/CD workflows, Git-based version control, and DevOps principles.

• Cloud experience, ideally with Azure (AWS or GCP also considered).

• Knowledge of web standards, REST APIs, HTTP protocols, accessibility, and front-end integration.

• Comfortable working with Agile practices and tools (sprint planning, boards, retrospectives).

• Experience mentoring or guiding junior developers and leading small engineering initiatives.

Package

• Salary up to £65,000 with benefits.

To speak in absolute confidence about this opportunity, please send an up-to-date CV via the link provided or contact Chris Busby, Associate Director - IT Recruitment UK & Ireland, 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 www.mcsgroup.jobs

All conversations will be treated in the strictest of confidence.