Senior Software Engineer

Senior Software Engineer - Server Side (C# / Worker Service / ORM)

Waterlooville, Hampshire | Up to £85,000 + Benefits | Onsite | 4 or 5 day week

Some projects are maintenance. Some are migrations. And then something genuinely rare comes along - a blank canvas, a serious engineering challenge, and a product deployed on military vessels around the world.

A well-established international maritime technology company is building a brand-new Integrated Maritime Management System (IMMS) from scratch in Waterlooville. The pace is real - there's a client demo in January. You'll be among the first engineers into the UK team, with a clear expectation that early hires grow into team lead roles.

The Role

You'll be at the heart of the system architecture, building the server-side framework that underpins everything. Clean, modular C# using a Worker Service pattern, a reusable common framework, and direct interfaces to sensors, effectors, and external systems. Production-quality engineering where simplicity, precision and pace all matter.

Stack

• C# / Worker Service, greenfield from scratch
• ORM, NHibernate / Entity Framework, SQL database design and creation
• DI, Unit Testing, modular 3-tier architecture
• Message Bus, Pub/Sub, SignalR, gRPC, TCP/IP, Sockets, Data Flow TPL
• Visual Studio
• Nice-to-have: Managed C++, defence / naval software background

What We're Looking For

• 6+ years C# server-side engineering experience
• Solid ORM, SQL databases, DI and unit testing
• Modular, composable architecture design - N-tier and message-based systems
• Experience interfacing with hardware devices or real-time data
• Eligible for SC security clearance

Onsite in Portsmouth / Havant (circa 30-person office). 40 hours over 4 or 5 days with some flexibility. Degree in Software Engineering or related discipline preferred.

Interested?

This role is being managed exclusively by Spectrum IT Recruitment. Contact Daniel Sumpter, Senior Consultant, danielsumpter@spectrumit.co.uk

Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.