Senior .NET Software Engineer

Position Summary

We are seeking a versatile and experienced Senior .NET Systems Analyst / Developer to design, develop, modify, and integrate complex information systems. In this role, you will bridge the gap between business needs and technical execution-translating requirements into technical specifications, designing robust .NET applications, and optimizing system performance. Combining hands-on coding with technical leadership, you will guide project phases, mentor junior team members, and drive innovative software solutions utilizing modern development tools including AI-assisted coding platforms.
Key Responsibilities

• Formulate and define system scope and objectives through targeted research to design, develop, modify, or integrate complex enterprise systems.
• Optimize application systems and procedures to enhance functional requirements, capacity, operating speed, and response times.
• Design, code, test, debug, and document complex programs, subroutines, scripts, and web services.
• Serve in technical leadership capacities-acting as project lead, technical lead, or senior analyst for small-to-medium efforts and managing critical phases of larger initiatives.
• Collaborate with business users and systems analysts to interpret functional requirements and translate them into technical specifications and application architectures.
• Develop and execute comprehensive program and system test plans alongside data verification strategies.
• Respond proactively to system failures and performance anomalies, executing root-cause analysis to minimize downtime and prevent recurrence.
• Provide technical mentorship, guidance, and training to less-experienced analysts and programmers.
• Maintain sharp technical expertise across software languages, databases, platforms, operating systems, and networks.

Qualifications & Requirements

• Technology Stack Expertise: Deep, hands-on experience with C#, .NET, ASP.NET, ADO.NET, MVC, SQL Server, T-SQL, jQuery, and WebAPI (spanning web, UI, and data services layers). Familiarity with GitHub Copilot and M365 Copilot is required; mainframe COBOL experience is a valued plus.
• Experience: 5 to 7 years of professional experience in systems analysis and software programming centered around the .NET ecosystem. Experience within the health insurance or highly regulated financial/healthcare industries is strongly preferred.
• Education: Bachelor's degree in Computer Science or a related field (equivalent experience accepted at a rate of one year of technical experience for every year of college).
• Leadership & Core Competencies: Proven history of leading medium-to-complex technology initiatives, organizing and prioritizing resources, and translating complex concepts for both technical and non-technical stakeholders.

Equal Opportunity Employer / Disabled / Protected Veterans

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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.

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 Info

Account Executive:


Nichols


Branch Phone:


View phone number on click.appcast.io


Location:


Ontario, CA