Salary: £80,000 - 80,000 per year Requirements: I require 10 years of C#/.NET (Core/5) development experience. I need proven expertise in scalable, distributed, low-latency systems. A strong background in web applications, gRPC, Kafka/RabbitMQ, and multithreading is essential. I expect a solid understanding of performance tuning, security, and software architecture. Experience with WPF and design patterns such as MVVM, MVP, and MVC is necessary. Excellent leadership and communication skills are a must. Responsibilities: I will need you to lead the design and development of high-performance, secure communication systems in C#.NET. You will be tasked with building low-latency, high-volume data applications for real-time processing. I expect you to define and drive the technical strategy aligned with our business objectives. Your role will involve overseeing code quality, conducting reviews, and implementing CI/CD pipelines. I want you to troubleshoot complex issues and ensure system reliability. You will also mentor developers and foster a culture of technical excellence. Technologies: C# CI/CD Kafka MVC MVVM RabbitMQ Security WPF Web gRPC ASP.NET More: We are a rapidly growing company based in Cambridgeshire, specializing in the development and supply of radio terminals, accessories, and applications for mission-critical and business-critical communications. Due to our continued expansion, we are looking for a Principal Software Engineer to join our growing team and play a key role in the development, integration, and maintenance of our web and communication platforms. If you have the relevant experience and are ready for your next challenge, I invite you to apply with a copy of your latest CV/Resume. last updated 24 week of 2026