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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Java Developer - **Company:** Leidos, Inc. - **Location:** Chevy Chase, MD, United States - **Salary:** $131,300.0 - $237,350.0 - **Contract:** Permanent contract - **Skills:** Testing (Software), Java (Programming Language), Agile Methodology, Amazon Web Services, Amazon S3, Automation of Tests, Unit Testing, Microsoft Azure, Bash Shell, Cloud Computing, Configuration Management, Code Review, Computer Programming, Data Systems, Software Design Patterns, DevOps, Amazon DynamoDB, Elasticsearch, Github, Spring Framework, Junit, Python (Programming Language), PostgreSQL, Microsoft Message Queuing, NoSQL, Scrum Methodology, Software Architecture, E2e Testing, Amazon Simple Notification Service (SNS), Software Engineering, Software Systems, System Programming, System Testing, Systems Integration, Scripting, Google Cloud, Performance Testing, AWS Lambda, Backend, Git Flow, Information Technology, Deployment Automation, Performance Monitor, Apache Kafka, Restful APIs, Software Version Control, Katalon Studio, Jenkins, Microservices - **Published:** November 7, 2026 - **Apply:** https://www.themuse.com/jobs/leidos/principal-java-developer-28e30d ## About the Role * In-depth experience with common Agile practices, service-oriented environments, and software development practices. * In-depth experience with Java and the Spring Framework, microservices architecture and design patterns, implementing RESTful APIs, and integrating with relational and NoSQL databases. * In-depth experience integrating with and delivering software solutions within DevOps toolsets and practices. * Direct experience utilizing software testing and performance tools, such as JUnit, and scripting languages, including Python and Bash, within an Agile development environment. * In-depth experience developing solutions in commercial cloud platforms (e.g., AWS, Google Cloud, Azure) and leveraging cloud data services (e.g., S3, RDS, EFS). * In-depth experience utilizing version control systems and issue/problem tracking systems. * Education and Experience: Bachelor's degree with 12 or more years of prior relevant experience, or a Master's degree with 10 or more years of relevant experience. Additional years of experience may be substituted in lieu of a degree., * Experience developing software that interfaces with data technologies, including Elasticsearch, Postgres, DynamoDB, Kafka, AWS SQS/SNS, AWS Lambda, and AWS S3. * Experience with SAFe development practices. #CABARESTON #ASBA ## Description We are seeking a highly skilled and experienced Principal Java Developer to support the Agile development, operations, and maintenance of mission-critical systems. Working within a DevOps framework, the successful candidate will contribute to major project deliverables throughout the software development lifecycle, including scope definition and work estimation, architecture and design, coding, and unit testing. In this role, you will apply your advanced software engineering expertise to develop and maintain high-performance applications, contribute to backend architectural decisions, mentor team members, and collaborate with cross-functional Agile teams to address complex customer requirements. This position offers an opportunity to influence technical solutions, leverage modern cloud and DevOps technologies, and deliver innovative capabilities that directly support important national security missions., * Backend Development: Design, develop, test, and maintain high-performance, scalable backend microservices using Java and the Spring Framework to meet customer information technology needs. * Technical Leadership and Architecture: Participate in software programming initiatives, shape backend architecture, mentor team members, and conduct code reviews to support the delivery of reliable, high-quality software solutions. * Testing and Automation: Develop and direct software system validation and testing methods using JUnit and Katalon, leveraging integrated, custom-developed software solutions to support automated deployment technologies. * Cloud-Based Development: Develop, prototype, and deploy solutions within a cloud-based platform, leveraging available platform services. * Infrastructure Analysis and Coordination: Analyze infrastructure requirements through proof-of-concept development, performance testing, and end-to-end testing, and effectively coordinate infrastructure needs driven by developed software to meet customer mission requirements. * Agile Collaboration: Support the Agile software development lifecycle following Program SAFe practices, coordinating closely with team members, Product Owners, and Scrum Masters to ensure User Story alignment and implementation in accordance with customer use cases. * DevOps and Configuration Management: Document and perform systems software development activities, including deploying build artifacts across different environments using GitFlow constructs and industry-leading DevOps tools such as GitHub, Jenkins, and scripting languages (e.g., Python and Bash). * Continuous Improvement: Apply and identify software development best practices and standard operating procedures to create innovative solutions that address customers' technical needs. Security Clearance Requirement: All candidates for consideration MUST possess an active TS/SCI with polygraph security clearance.