Senior Software Engineer
First seen by Alion on Nov 5, 2026.
Role: Senior Software Engineer / Senior .NET Developer (Contract)
Location: Cape Town, hybrid; preference for candidates based in Cape Town
Contract: Initial 12 months
Experience: 8-10 years software development; at least 5 years hands-on with Microsoft .NET
Environment: Enterprise information security platform and related security initiatives
Role in plain language:
This senior contract role will build and support secure business applications and APIs for an enterprise information security programme. The developer will enhance an existing self-service platform, connect it with other systems, resolve production issues and help improve its reliability.
They will work with analysts, security specialists, project managers and other developers.
The strongest candidates combine deep C# and .NET delivery with practical web application, API and SQL Server experience. They should be comfortable working in a regulated enterprise setting and contributing to technical design as well as hands-on development.
Candidate:
You would join a 12-month Cape Town hybrid contract focused on developing and improving an enterprise information security platform. The work includes new application features, integrations, production support and technical design. The team is looking for a senior .NET engineer who can contribute independently and work closely with security and business stakeholders. Extension may be possible depending on project requirements and performance.
Requirements:
- At least 8 years of software development and 5 years of hands-on Microsoft .NET work; clarify dates and recency.
- Strong C# plus .NET Framework and modern .NET, with ASP.NET MVC or Web API, Entity Framework and SQL Server/T-SQL.
- Production delivery of enterprise applications, REST APIs and integrations, with Git-based source control.
- Practical ownership of design, testing, production support, incident analysis and performance/reliability improvements.
- Ability to work with security and business stakeholders; secure development and identity integration are valuable differentiators.
- Cape Town hybrid availability and contract fit.