About this role
Salary: £65,000 - 65,000 per year
Requirements: Strong .NET development experience working on complex or business-critical systemsExperience in billing/invoicing systems or transactional financial productsAbility to take ownership of an existing system and understand legacy codeStrong C# / .NET and SQL Server experienceExperience with APIs and system integrationsAbility to troubleshoot issues and explain system behaviour to non-technical stakeholdersExposure to containerisation, such as DockerFamiliarity with modern DevOps practicesExperience with reverse engineering, transformation programmes, or modernisation initiativesExperience working in environments with limited documentationExperience using AI-assisted engineering tools such as Claude or Copilot in production Responsibilities: Work within a complex billing environment supporting system stabilisation, reverse engineering and transformationAnalyse existing code to uncover undocumented behavioursTranslate technical findings into clear documentation for technical and business teamsWork closely with Billing SMEs, Business Analysts and programme stakeholdersAct as the bridge between technical implementation and real-world billing processesSupport ongoing changes and enhancements to the existing billing platformEnsure delivered work aligns with the transition to a new enterprise billing systemUse AI-assisted tooling to improve understanding, documentation and delivery Technologies: AIC#CopilotDevOpsDockerSupportSQLASP.NETAPICloudSecurity More:
We are a globally connected business operating at the heart of international trade, with a worldwide name and over 100,000 employees following recent acquisitions. You will join us on a 2-year fixed-term contract within a major multi-year Billing Transformation Programme, where we are replacing a complex legacy billing platform with a modern enterprise solution. This is a high-impact, well-invested programme with the opportunity to introduce AI into production. The role is hybrid, with a minimum of 3 days per week in our Southampton office. We offer a 10% bonus, 8% pension, private medical cover, life assurance, and 25 days holiday plus bank holidays. This role cannot offer visa sponsorship.
last updated 32 week of 2026