Senior Application Developer

GovCIO is currently hiring a highly skilled Senior Application Developer with an active Secret clearance to design, build, and modify application software using programming languages such as Java, Cold Fusion, JavaScript, and C#. This position will be located in Fairfax, VA and will be a hybrid position.

• Implement multiple design patterns.
• Integrate COTS products, use APIs, interact with data repositories, cross-domain solutions, and manage system interfaces.
• Manage legacy code and/or develop new code using container technologies.
• Develop and execute unit tests to verify code meets functional requirements.
• Resolve integration issues, vulnerabilities, and functional defects.
• Develop and maintain secure, scalable Java applications supporting cross-domain data exchange in compliance with federal standards.
• Collaborate with system architects, cybersecurity teams, and government stakeholders to implement mission-critical features.
• Integrate with enterprise services and APIs, ensuring secure communication across multiple classification levels.
• Participate in Agile ceremonies and contribute to sprint planning, backlog grooming, and technical reviews.
• Write clean, well-documented code that adheres to federal security and software development lifecycle (SDLC) guidelines.
• Support modernization efforts by refactoring legacy systems into cloud-native, containerized Java applications.
• Conduct unit and integration testing and assist in automated deployment using CI/CD pipelines.
• Troubleshoot and resolve technical issues across development, staging, and production environments.
• Collaborate with cross-functional teams to ensure interoperability, data integrity, and compliance with cross-domain solution (CDS) policies.

• Bachelor's degree in Computer Science, Engineering, or related field with 12+ years of experience with large integrated projects and 5+ years of professional experience in Java d