We are seeking a Principal C# Software Engineer with deep expertise in Windows Forms (WinForms) and .NET Framework-based enterprise desktop applications to lead complex software development projects and drive technical excellence across the team. In this role, you will architect scalable desktop solutions, collaborate cross-functionally, and champion an AI-first mindset that leverages intelligent automation to accelerate development and innovation.

Key Responsibilities

Lead the design and architecture of complex enterprise desktop applications using WinForms and .NET Framework, ensuring scalability, performance, and reliability
Develop sophisticated functionality and integrations aligned with business requirements and technical standards
Collaborate with product managers, business analysts, and designers to translate requirements into robust technical solutions
Provide technical leadership and mentorship to junior and mid-level developers, promoting best practices and coding standards
Conduct code reviews, develop technical specifications, and maintain comprehensive design documentation
Diagnose and resolve complex technical issues, including performance optimization and debugging of WinForms-based applications
Champion an AI-first approach — proactively integrating GenAI and agentic AI tools to enhance development workflows, identify automation opportunities, and share AI-enhanced practices with the team
Establish team guidelines for AI tool usage, lead AI adoption initiatives, and collaborate with non-technical stakeholders on intelligent automation solutions

Required Qualifications

Bachelor’s degree in computer science, Software Engineering, Information Systems, or a related field
7+ years of professional software development experience
Expert-level proficiency in C#, including advanced features and best practices
Extensive experience with Windows Forms (WinForms) in production environments
Strong proficiency in .NET Framework (4.x) with deep knowledge of its components, libraries, and deployment practices
Proficiency in SQL Server, Oracle, or other relational databases, including complex queries, stored procedures, and performance tuning
Experience with ORM frameworks such as Entity Framework
Solid understanding of software design patterns, OOP, and SOLID principles
Proven experience leading development projects and mentoring engineering teams
Familiarity with Agile/Scrum methodologies and development environments such as Visual Studio or TFS
Strong communication skills with the ability to convey technical concepts to non-technical stakeholders

Preferred Qualifications

Experience establishing AI standards and driving AI tool adoption across engineering teams
Demonstrated ability to integrate GenAI or agentic AI tools into software development workflows
Experience writing and maintaining unit tests using modern testing frameworks
Background in cross-functional collaboration with product, design, and business stakeholders
Track record of driving process improvements and innovation within engineering teams

About Deltek

Deltek is the intelligent, industry-tuned platform that powers the project lifecycle from ERP and accounting to delivery and analysis. Trusted by 30,000 organizations worldwide, Deltek delivers speed, clarity, and control.

Why Join Deltek?

Innovate with purpose — work on meaningful software used by thousands of project-based businesses globally
Grow your career — Deltek is committed to continuous learning, development, and empowering employees to lead
Award-winning culture — recognized as a Top Workplace, Deltek fosters an environment built on integrity, collaboration, and community, inclusion & impact