Position OverviewWe are seeking a highly skilled
Senior C# Software Engineer to design, build, and maintain scalable, high-performance Windows applications while driving robust installation, upgrade, and release engineering practices.
In this role, you will work closely with cross-functional development, QA, and product teams to deliver high-quality software releases using modern .NET technologies. You will own the MSI packaging and deployment lifecycles, influence architectural decisions, and mentor junior engineers.
Key Responsibilities- Application Development: Design, develop, test, and maintain robust desktop and backend applications using C# and .NET Framework/.NET Core / Windows Services.
- Installer & Packaging Engineering: Create, maintain, and troubleshoot MSI packages, bootstrapper applications, upgrade packages, patches, hotfixes, and silent installation routines using WiX Toolset and Advanced Installer.
- Release & Deployment Strategy: Architect reliable upgrade, patching, rollback, and migration strategies for enterprise software releases.
- CI/CD & Automation: Contribute to automated CI/CD pipelines, release management workflows, and infrastructure scripting using GitHub Actions and PowerShell.
- Technical Leadership: Participate in code reviews, troubleshoot complex installation-related production issues, and provide mentorship to junior developers.
Qualifications & Requirements- Education: Bachelor's degree in Computer Science, Software Engineering, or equivalent practical experience.
- Development Experience: 5-6+ years of professional software development experience specializing in C#, .NET Framework, .NET Core, and Windows Services.
- Installer Expertise: Hands-on proficiency with Advanced Installer and WiX Toolset, with a deep understanding of Windows Installer internals and troubleshooting deployment issues.
- Release Engineering: Proven experience building and managing CI/CD pipelines, GitHub Actions, and writing PowerShell automation scripts.
- Soft Skills: Strong analytical, communication, and collaboration skills with the ability to lead technical initiatives and guide team members.
Preferred Qualifications- Experience with cloud platforms (Azure or AWS) and containerization tools (Docker, Kubernetes).
- Knowledge of microservices architecture or event-driven distributed systems.
- Familiarity with modern frontend frameworks (e.g., Angular, React, Blazor).
- Previous experience leading small technical teams or driving architectural roadmaps.
Equal Opportunity Employer / Disabled / Protected Veterans
The Know Your Rights poster is available here:
_EEOC_KnowYourRights6.12.pdf
The pay transparency policy is available here:
_%20English_formattedESQA508c.pdf
For temporary assignments lasting 13 weeks or longer, AllSTEM Connections is pleased to offer major medical, dental, vision, 401k and any statutory sick pay where required.
We are committed to working with and providing reasonable accommodations to individuals with disabilities. If you need a reasonable accommodation for any part of the employment process, please contact your staffing representative who will reach out to our HR team.
AllSTEM Connections participates in the E-Verify program in certain locations as required by law. Learn more about the E-Verify program.
_Participation_Poster_ES.pdf
We also consider for employment qualified applicants regardless of criminal histories, consistent with legal requirements, including, if applicable, the City of Los Angeles' Fair Chance Initiative for Hiring Ordinance. Pursuant to applicable state and municipal Fair Chance Laws and Ordinances, we will consider for employment-qualified applicants with arrest and conviction records, including, if applicable, the San Francisco Fair Chance Ordinance. For Los Angeles, CA applicants: Qualified applications with arrest or conviction records will be considered for employment in accordance with the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act.
Additional Skills(none specified)
AllSTEM Representative Contact InfoAccount Executive: Nichols
Branch Phone: Location: Ontario, CA
