Level D&I Solutions

We are seeking a Full-Stack C# Developer to support and enhance client-server and web-based applications. This role focuses on C# WinForms development, Angular web forms, secure API integrations, and encrypted data exchange. The ideal candidate has strong SQL skills, experience with secure communications, and a solid understanding of enterprise-grade security standards.

Job Title: Full-Stack C# Developer (WinForms, Angular, APIs, Secure Communications)

• Location: Onsite in Columbus, OH
• Duration: Contract to Hire

Key Responsibilities:

• Design, develop, and maintain C# WinForms client-server applications
• Build and support Angular web forms with ASP.NET Core/Web API backends
• Develop secure APIs integrated with MS SQL Server and optimized stored procedures
• Create and maintain Windows Services for background processing
• Implement secure data exchange using SFTP and machine-to-machine communications
• Ensure encryption and security compliance (including FIPS 140-2 where applicable)
• Monitor, troubleshoot, and optimize system performance and data integrity

Required Skills & Qualifications:

• Strong experience with C# and .NET Framework / .NET Core
• Hands-on WinForms development experience
• Angular (v10+ preferred) web application development
• RESTful API development using ASP.NET Core/Web API
• MS SQL Server, stored procedures, and performance tuning
• Secure authentication and authorization (OAuth, JWT, SSL/TLS)
• Experience with Windows Services and secure communication protocols (SFTP, SMTP, M2M)
• Familiarity with Git version control

Security & Compliance Experience:

• Implementing encrypted data storage and transmission
• Secure coding practices and vulnerability awareness
• FIPS 140-2 experience highly preferred

Nice to Have:

• Blazor, WPF, or modern UI frameworks
• DevOps / CI-CD pipelines
• Cloud platforms (Azure or AWS)
• Message queuing (RabbitMQ, MSMQ, Kafka)
• Containerization (Docker/Kubernetes)

Education & Experience:

• Bachelor’s degree in Computer Science or related field (or equivalent experience)
• 3+ years of C# WinForms and SQL development
• 2+ years of Angular and API development

Pay: $45.00 - $65.00 per hour

Work Location: In person