.NET Developer with Oracle PL/SQL 5645

.NET Developer with Oracle PL/SQL

Must be a US citizen.

Must be able to achieve a NACLC clearance.

4 days remote- onsite every Wednesday in downtown Philadelphia, PA

Contract to Hire

Tier4 Group 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.