Mid-Tier Application and Database Developer

AGE is seeking a Software Developer with strong C# and database expertise to join our development team. This role focuses on building and maintaining robust middle-tier services and data-driven applications. The candidate will work closely with cross-functional teams to design, develop, maintain and optimize scalable backend systems that power critical business functionality.

The ideal candidate combines solid middle-tier development experience with deep database development knowledge and a strong understanding of system design, performance, maintainability, and data integrity.

This role is hybrid in Philadelphia, PA, requiring onsite reporting at the customer’s facility at least 1 day/week. Candidates must reside within a commutable distance of Philadelphia, PA in order to work onsite as required.

Responsibilities Include:

• Design, develop, and maintain middle-tier services and backend components using C# and .NET technologies.
• Apply SOLID principles and clean architecture practices in application design.
• Build robust APIs and business logic layers to support web and enterprise applications.
• Collaborate with front-end developers, architects, and DevOps teams to deliver integrated solutions.
• Design, develop, optimize, and maintain relational databases (Oracle preferred).
• Write efficient stored procedures, views, functions, and complex queries.
• Optimize database performance, indexing strategies, and query tuning.
• Participate in code reviews and enforce best practices for clean, maintainable code.
• Troubleshoot and resolve production issues related to application logic and data layers.
• Contribute to architectural decisions and technical design discussions.
• Document technical designs and implementation details.

Required Skills, Qualifications and Experience:

• BA/BS in technical discipline.
• 10 years of experience in middle-tier and database development.
• Experience in applying SOLID principles and object-oriented design patterns.
• Strong proficiency in C# and .NET (.NET Core/.NET 6+) and ASP.NET Web API.
• Experience designing and building RESTful APIs and middle-tier services.
• Experience with ORM frameworks (Entity Framework preferred, Dapper).
• Strong SQL skills and experience with relational databases (Oracle preferred, SQL Server, PostgreSQL).
• Experience writing and optimizing complex queries and stored procedures.
• Strong understanding of data modeling and database design principles.
• Experience with version control systems (TFVC and Git).
• Strong problem-solving skills and attention to detail.
• Must be a United States citizen with a DoD Secret clearance or ability to obtain a favorably adjudicated T3 investigation.

Preferred Qualifications:

• Experience with microservices architecture
• Experience with CI/CD pipelines and DevOps best practices
• Experience with cloud platforms (Azure preferred)
• Experience with caching strategies (Redis, in-memory caching)
• Experience with performance profiling and monitoring tools
• Experience with containerization (Docker, Kubernetes)
• Experience with automated testing frameworks

Work Environment and Physical Demand:

• Must be able to work for extended periods of time at a computer.

Compensation: $115,000+