19 of 19 Permanent .NET Jobs in Southampton

.NET Developer - .NET/C#/APIs - is required by fast growing and highly successful organisation. Overall purpose of the role They are looking for a hands-on Software Developer to help develop, enhance and support their customer-facing, operational and internal systems. This role will focus … contribute across the full delivery lifecycle and help improve delivery quality, documentation and technical resilience over time. Main duties Develop, enhance, test and support .NET-based applications, APIs and integrations. Work on customer-facing, operational and internal systems, helping to improve reliability, usability and business value. Collaborate with business ...

improve what is there today, not just design the system they wish existed, while helping us move toward a more consistent modern .NET and Azure engineering platform. The estate you are joining You will be working across a mixed estate. Some products are modern .NET and React/… TypeScript, while others are older VB.NET/C# applications on .NET Framework and ASP.NET Web Forms. A lot of important business behaviour also sits in SQL Server, including large stored procedures and database-driven workflows. We are modernising this progressively rather than pretending the legacy estate does not exist. ...

directly with users and domain specialists. About You - You've delivered production software and have strong skills in one or more of C#/.NET, TypeScript/Angular or Python/Django . You're comfortable building APIs, working with relational databases and integrating business systems. You already ...

directly with users and domain specialists. About You - You've delivered production software and have strong skills in one or more of C#/.NET, TypeScript/Angular or Python/Django . You're comfortable building APIs, working with relational databases and integrating business systems. You already ...

deliver reliably and step into the difficult engineering work when that is where you add most value. Our estate is mixed. We have modern .NET and React applications, older .NET and VB.NET systems, SQL-heavy business logic, APIs, integrations and mobile components that still matter … estate you are joining A significant part of the estate is legacy and business-critical. You will work with VB.NET and C# applications on .NET Framework, ASP.NET Web Forms, SQL Server databases with substantial business logic in stored procedures, older integration patterns and applications that have evolved over many ...

cloud-based software solutions. Provide technical leadership across the software development lifecycle, from initial design through implementation, testing and deployment. Work extensively with C#, .NET and cloud technologies to develop and enhance complex software applications. Champion the practical use of AI development tools, including GitHub Copilot, Claude Code ...

cloud-based software solutions. Provide technical leadership across the software development lifecycle, from initial design through implementation, testing and deployment. Work extensively with C#, .NET and cloud technologies to develop and enhance complex software applications. Champion the practical use of AI development tools, including GitHub Copilot, Claude Code ...

directly with users and domain specialists. About You - You've delivered production software and have strong skills in one or more of C#/.NET, TypeScript/Angular or Python/Django . You're comfortable building APIs, working with relational databases and integrating business systems. You already ...

directly with users and domain specialists. About You - You've delivered production software and have strong skills in one or more of C#/.NET, TypeScript/Angular or Python/Django . You're comfortable building APIs, working with relational databases and integrating business systems. You already ...

However, suitable and demonstrable professional experience will also be considered. Required experience: System/implementation engineering for complex data driven solutions Scripting (PowerShell/.Net/C#/Java, etc.) APIs (REST, SOAP) including interfacing with Postman or Fiddler Technical and analytical skills Windows server/client Efficient, effective ...

take ownership of your work, ask good questions and keep developing your engineering skills. Not everything here is greenfield. You will work with modern .NET and React alongside older applications, SQL-heavy logic and integrations that have grown over time. Part of the job is learning how those systems … estate you are joining This is a mixed technology estate rather than a clean-sheet product. You may work on newer C#/.NET and React/TypeScript services one day and then need to understand an older VB.NET, .NET Framework or ASP.NET Web Forms application the next. ...

will stay close to the code, set direction, and make pragmatic architecture decisions to help the team deliver reliably. The estate combines modern .NET/React with legacy VB.NET and SQL-heavy systems. You will own the current stack, decide what to modernise in place, and work toward clearer ...

.NET Developer - .NET/C#/APIs - is required by fast growing and highly successful organisation. Overall purpose of the role They are looking for a hands-on Software Developer to help develop, enhance and support their customer-facing, operational and internal systems. This role will focus ...

automation to speed feedback. The role emphasizes Playwright automation, API and integration testing, and improving CI/CD quality gates. You will test modern (.NET/React) and legacy systems across SQL-driven workflows, contributing to a robust quality culture. #J-18808-Ljbffr ...

architectural direction, ensure secure, scalable software, and shape how AI is applied in design, development and testing. The role centers on C# and .NET with hybrid working—2 office days per week in Southampton area—and eligibility for UK Security Clearance. Competitive salary £90,000–£110,000 plus ...

manual testing where judgement adds more value. The estate you are joining You will test across both modern and legacy applications. That includes newer .NET, React/TypeScript and API-based services, but also older VB.NET/.NET Framework applications, ASP.NET Web Forms and workflows where … regression and acceptance testing where it adds value. Load and performance testing tools and techniques where appropriate. Existing Selenium, MSTest and tests around older .NET Framework/Web Forms applications may still need to be understood and maintained during transition. Where we are heading Playwright-based automated regression coverage ...

month fixed-term contract in Southampton. You will own complex changes from design through to production, combining legacy VB.NET/C# and modern .NET with React/TypeScript in a mixed estate. The role is hands-on and requires strong full-stack capability across web apps, APIs and data … integrations. You will navigate a mix of legacy and modern systems, modernising platforms toward consistent .NET and Azure patterns, with a #J-18808-Ljbffr ...

build, test and support applications underpinning essential services with a broad stack, taking ownership and growing your engineering skills. You'll work with modern .NET and React alongside legacy VB.NET, .NET Framework and ASP.NET Web Forms, with SQL Server at the core. Expect learning modern patterns, APIs, Azure ...

Application Specialist (eFront/Financial Services) Southampton (Hybrid 2 days per week) £60-75k + £12k Managerial bonus + 10% Annual Bonus Your new company You'll be joining a highly successful international financial ...