Middle-Tier Database Developer

About this role

About Us

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 Solutions is looking for a Middle-Tier Database Developer, responsible for building and maintaining robust middle-tier services and data-driven applications. You 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.

Responsibilities Include:

• Design, develop, and maintain middle-tier services and backend components using C# and .NET technologies that interact with Oracle databases and enterprise systems.

• Translate business and functional requirements into scalable backend application designs and technical solutions.

• Develop application business logic, APIs, services, interfaces, and data-access components that support business requirements.

• Build robust RESTful APIs and business logic layers to support web applications and connectivity to external interfaces.

• Implement efficient application-to-database interactions using Oracle SQL, PL/SQL, stored procedures, and appropriate data-access frameworks.

• Design, develop, optimize, and maintain relational databases (Oracle preferred) that load, store, and transmit complex data transactions (e.g., EDI).

• Optimize database performance, indexing strategies, and query tuning

• Strong understanding of database design principles and SQL, and ability to navigate between database and client web page technology.

• Implement actionable database code using complex SQL, PL/SQL packages, procedures, functions, triggers, views, and other database objects.

• Apply SOLID principles and clean architecture practices in application design.

• Troubleshoot and resolve production issues related to application logic and data layers

• Contribute to architectural decisions and technical design discussions

• Troubleshoot application, integration, database connectivity, performance, and production issues across the application stack.

• Collaborate with frontend developers, Oracle database developers, business analysts, testers, architects, and infrastructure teams to solve critical business issues.

• Support automated testing, CI/CD pipelines, application deployments, releases, and production operations.

• Primary duty (≥50%) involves applying systems analysis techniques and designing/developing/testing software/services and databases to meet user/system specifications.

Required Skills, Qualifications and Experience:

• Citizenship and Clearance:

• Must be a US citizen.

• Must be able to achieve a NACLC clearance.

• Experience:

• Minimum 5 years related experience.

• Education:

• Bachelor’s degree

• Certifications:

• DoD IAT Level II Certification, such as CompTIA Security+CE or equivalent

• Skills and Knowledge:

• Languages and Frameworks: C#, JavaScript, .NET MVC, Angular

• Database: Oracle (PL-SQL), Toad SQL Editor

• Version Control: Azure DevOps Server 2022, Visual Studio 2026

• Additional Technologies: Git, Docker, Kubernetes, Microsoft Azure.

• Experience 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

• Location:

• Hybrid Work Environment: Requires on-site work at the client facility in Northeast Philadelphia, PA, each Wednesday.

• Candidates should be aware that the Government may increase the on-site requirement in the future.

Preferred Qualifications:

• Experience with Electronic Data Interchange (EDI) is a plus.

• Exposure to version control systems like TFS, Visual Studio, Git.

• Prior experience in a DoD or government contracting environment.

• Military Medical Supply Chain experience is a big plus.

• Experience with at least several of the areas below or similar technologies:

• CI/CD concepts or tools (e.g., Azure DevOps, Jenkins)

• DevOps services using infrastructure as a service provider (e.g., Microsoft Azure)

• Containerization technologies (e.g., Docker, Kubernetes)

• Version Control and Collaboration (Git/GitHub/GitLab)

• Configuration management tools (e.g., TFS, Jira)

• Static code analysis tools (SonarQube, Fortify)

Work Environment:

• Professional office and technical environment supporting mission-critical DoD medical logistics applications and enterprise systems.

• Work involves extensive use of computers, software-development environments, database tools, collaboration platforms, and standard office equipment.

• Requires regular collaboration with Government personnel, developers, database specialists, business analysts, testers, architects, and infrastructure teams.

• May require occasional work outside normal business hours to support deployments, releases, production incidents, maintenance, or other mission-critical activities.

• Requires compliance with applicable Government facility, security, cybersecurity, and system-access requirements.

Physical Demands:

• Primarily sedentary work involving…