Senior Java Software Developer Jobs in Philadelphia, PA

Responsibilities
Noblis MSD is seeking a Senior Java Developer to support a large-scale software project for U.S. Navy programs. This is an onsite position based at the Philadelphia Navy Yard.
Noblis MSD supports Naval Sea Systems Command (NAVSEA) and Naval Surface Warfare Center Philadelphia Division (NSWCPD) by providing engineering, software development, systems integration, cybersecurity, logistics, and life-cycle support to Navy programs.
The Senior Java Developer will work as part of a software development team to design, develop, maintain, test, and support Java-based applications. The ideal candidate has experience working with large software codebases, helping improve existing applications, and supporting other developers through collaboration, code reviews, and technical guidance. Other languages include Gradle, bash, python, structured text, and ladder logic.
Responsibilities:

• Design, develop, maintain, and enhance Java software applications
• Support software development, troubleshooting, testing, integration, and release activities
• Work with large existing Java codebases and help improve maintainability over time
• Review, understand, and update existing software as needed
• Support modernization, refactoring, and performance improvement efforts
• Participate in code reviews and help promote good software development practices
• Support build, deployment, and release activities using tools such as GitLab, Jira, SonarQube, or similar platforms
• Assist with troubleshooting software issues identified during development, integration, testing, or field support
• Help mentor or guide other developers when needed
• Collaborate with software developers, testers, engineers, cybersecurity personnel, and program stakeholders
• Support technical documentation such as design notes, release notes, installation instructions, and user/support guidance
• Communicate status, blockers, risks, and technical issues clearly and professionally

Required Qualifications

• Bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering, Software Engineering, Information Systems, or a relevant technical discipline
• 8+ years of experience developing software using Java
• Experience working with large or multi-module Java applications
• Experience maintaining, troubleshooting, or refactoring existing Java codebases
• Strong understanding of object-oriented design and software development best practices
• Experience with Java 17 or later
• Familiarity with Java modernization concepts, such as records, enhanced switch, modularity, dependency management, or related language/platform improvements
• Experience with version control tools such as Git or GitLab
• Experience using issue tracking tools such as Jira or similar platforms
• Familiarity with CI/CD concepts and tools such as GitLab CI/CD, or similar platforms
• Familiarity with code quality tools such as SonarQube or similar platforms
• Ability to work in a Linux environment
• Ability to work as part of a team and communicate effectively with people at varying technical levels
• Must be a U.S. Citizen
• Ability to obtain a Secret clearance

Desired Qualifications

• Master's degree in Computer Science, Computer Engineering, Electrical Engineering, Software Engineering, Information Systems, or a relevant technical discipline
• Experience supporting modernization or refactoring of large Java applications
• Experience with Java platform migrations
• Experience with Bash scripting or general automation scripting
• Experience with Docker, containers, or RHEL 8/9 environments
• Familiarity with JGroups or distributed Java applications
• Experience helping guide, mentor, or support other developers
• Experience supporting software integration and formal test events
• Experience writing clear technical documentation, including design notes, release notes, and installation guidance
• Experience working on DoD, Navy, or other government software programs
• CompTIA Security+, Linux certification, Oracle Java certification, or similar certifications are a plus

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Overview
Overview
Noblis and our wholly owned subsidiaries, Noblis ESI and Noblis MSD, take on some of the nation's toughest challenges, delivering advanced solutions to our customers' most critical missions. We bring together leading scientific, engineering, and management expertise in a culture grounded in objectivity and collaboration, ensuring our work creates lasting impact across federal missions.
We work with a broad range of government agencies in the defense, intelligence, and federal civilian sectors. Learn more and find opportunities at careers.noblis.org
Why Work at Noblis
At Noblis, we share a passion for excellence and innovation, and we create an environment where people can do meaningful work while maintaining the balance that keeps them energized and fulfilled. We seek out individuals with a natural curiosity and desire to collaborate and learn. We believe our people are our greatest strength, and we consistently seek exceptionally skilled, mission-driven professionals who care deeply about doing work that enriches lives and makes our nation safer.
Noblis has earned numerous workplace awards for our culture, our commitment to employee well-being, and our dedication to meaningful, impactful work. We also maintain a drug-free workplace.
Remote/hybrid status is subject to change based on Noblis and/or government requirements.
Commitment to Non-Discrimination
All qualified applicants will receive consideration for employment without regard to race, color, ethnicity, sex, age, national origin, religion, physical or mental disability, pregnancy/childbirth and related medical conditions, veteran or military status, or any other characteristics protected by applicable federal, state, or local law.
If reasonable accommodation is needed to participate in the job application or interview process, to perform essential job functions, and/or to receive other benefits and privileges of employment, please contact us.
EEO is the Law | E-Verify | Right to Work
Total Rewards
At Noblis we recognize and reward your contributions, provide you with growth opportunities, and support your total well-being. Our offerings include health, life, disability, financial, and retirement benefits, as well as paid leave, professional development, tuition assistance, and work-life programs. Our award programs acknowledge employees for exceptional performance and superior demonstration of our service standards. Full-time and part-time employees working at least 20 hours a week on a regular basis are eligible to participate in our benefit programs. Other offerings may be provided for employees not within this category. We encourage you to learn more about our total benefits by visiting the Benefits page on our Careers site.
Compensation at Noblis is determined by various factors, including but not limited to, the combination of education, certifications, knowledge, skills, competencies, and experience, internal and external equity, location, clearance level, as well as contract-specific affordability, organizational requirements and applicable employment laws. The projected compensation range for this position is based on full time status. For part time or on-call staff, compensation is proportionately adjusted based on hours worked. While monetary compensation is important, it's just one component of Noblis' total compensation package.
Posted Salary Range
USD $120,700.00 - USD $188,725.00 /Yr.