To support a legacy enterprise security product, the full-time Senior .NET Support Engineer will provide engineering support for the product's Long-Term Support (LTS) track, troubleshoot complex customer environments, and implement bug fixes while working remotely. Key responsibilities Provide engineering support for the legacy product's Long-Term Support (LTS) track Investigate, troubleshoot, and resolve complex product issues reported by customers Collaborate with internal Support, Engineering, and SRE teams through defined escalation processes Required qualifications 5+ years of professional experience in software engineering, product support, or application maintenance Strong commercial experience with .NET/C# development and backend/API development Solid experience working with SQL Server databases Hands-on experience supporting enterprise-grade, security-sensitive software Strong understanding of secure development practices and software patching processes