Principal Software Engineer – Sepura
Sepura, Cambridge, United Kingdom
We are recruiting an experienced Principal Software Engineer to lead the design, development, and optimisation of our mission‑critical communication infrastructure. The role is central to ensuring the reliability, performance and scalability of systems vital for public safety and essential services. You will act as a technical leader, mentoring other engineers and driving best practices across the development lifecycle.
Responsibilities
* Lead the architecture, design and implementation of high‑performance, resilient and secure communication systems using C#/.NET.
* Develop robust, low‑latency applications that handle high‑volume data traffic (e.g., messaging queues, real‑time data processing).
* Drive technical vision and strategy for the platform, ensuring alignment with long‑term business goals and industry standards.
* Conduct code reviews, establish coding standards and implement continuous integration/continuous delivery (CI/CD) pipelines.
* Troubleshoot and resolve the most complex technical issues, ensuring maximum system uptime and reliability.
* Mentor and guide mid‑level and senior developers, fostering a culture of technical excellence and innovation.
Day‑to‑Day
Our customer base spans multiple industries and markets worldwide. Sepura’s TETRA and LTE solutions are developed specifically to meet critical communication challenges. There is no typical day; you will be supported by your manager and team, collaborating with other departments across the business. The Software Team follows an Agile development process centered around Scrum ceremonies, and during each sprint you will take on several tasks related to the responsibilities listed above.
Qualifications
* Degree in a relevant discipline.
* 10+ years of professional software development experience, with significant focus on C# and the .NET framework (including .NET Core/.NET 5+).
* Deep expertise in designing and developing highly scalable, distributed systems (e.g., microservices architecture).
* Experience with development of Web Applications.
* Proven experience with protocols and technologies common in communication or high‑availability systems (e.g., TCP/IP, gRPC, messaging services like Kafka or RabbitMQ).
* Expertise in performance tuning, concurrency and multithreading to achieve low‑latency processing.
* Strong understanding of security principles related to critical infrastructure.
* Excellent problem‑solving, communication and technical leadership skills.
* UI front‑end frameworks such as WPF, MVVM, MVP or MVC.
Nice to Have
* Planning software projects (considering resourcing, task dependencies, tool requirements, etc).
* Working in an Agile SCRUM environment.
* Experience using virtual environments such as Docker.
* Experience using Kotlin/Java.
* Toolchain configuration (CI/CD, version control, defect tracking tools, code analysis, automated testing).
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