Agecareers4d ago

Mid-Tier Application and Database Developer

United States·Philadelphiamid

Database DeveloperSoftware Engineering

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Quick Summary

Key Responsibilities

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.

Requirements Summary

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.

Technical Tools

Database DeveloperSoftware Engineering

AGE Solutions is a premier technology and professional services company, providing in-depth consulting, advanced technology solutions, and essential services throughout the U.S. government, defense, and intelligence sectors. Prioritizing innovation and client-focused solutions, we assist major agencies in addressing intricate issues and ensuring a more secure future.

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

~1 min read

→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.

Requirements

~1 min read

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.