Principal Software Engineer

About the role

Location: Woodlawn, MD Security Clearance: [Security Clearance] Job Type: Full-Time Target Salary Range*: $134,000 - $171,000 *This represents the potential salary range for this position depending on education level, years of experience and/or certifications in addition to other position specific requirements which may impact salary Position Overview Design, develop, and enhance software applications using Twelve-Factor App methodology, modern UI and presentation technologies, Java and JEE technologies, Spring Boot, microservices, RESTful and SOAP-based web services, cloud platforms, and enterprise batch processing. Provide technical leadership, collaborate with cross-functional teams, develop viable technical solutions, improve architecture and code quality, and provide guidance to junior and mid-level developers. Key Responsibilities Software Design and Development Design and develop software applications using Twelve-Factor App methodology based on functional requirements. Design and develop microservices using Spring Boot, Java, and RESTful architecture. Develop highly innovative UI designs and web components through collaboration with other technical experts. Continually assess advancements in technology and recommend solutions that improve the software developer experience and efficient delivery of software. Impact functional strategy by developing new solutions, processes, standards, or operational plans that position Leidos competitively in the marketplace. Front-End Development and Accessibility Implement graphical user interfaces using AngularJS, ReactJS, Node.js, TypeScript, JavaScript, JSP, HTML, CSS, XML, AJAX, and jQuery. Develop front-end applications using modern JavaScript and ES13+ features, including classes, arrow functions, template literals, and modules. Design web page components compliant with Section 508 of the Rehabilitation Act (29 U.S.C. 794d). Develop responsive web pages while considering cross-browser limitations and browser compliance standards. Cloud, DevOps, and Application Operations Apply DevOps practices, CI/CD pipelines, and tools including Jenkins, Git, Bitbucket, OpenShift, and cloud platforms such as AWS, Azure, or Google Cloud. Use containerization technologies. Design and deploy cloud-native applications onto AWS with PostgreSQL. Use PaaS offerings such as Red Hat OpenShift and Docker. Develop highly scalable software applications in cloud environments that handle high volumes of data and traffic. Tune application performance for effective CPU and memory utilization and quick turnaround response times. Enterprise Java and Batch Processing Develop and maintain Enterprise Java Batch applications using the JSR 352 specification. Schedule Java Batch jobs using Control-M. Apply JEE technologies including Struts, Spring Framework, Spring Boot, Spring JDBC, JPA, Hibernate, SOAP/RESTful services, XML, DB2, Tomcat, and WebSphere. Web Services and APIs Develop SOAP-based web services using JAX-WS, Apache Axis, and WSDL. Implement web service security using WS-Security and the existing IBM DataPower infrastructure. Ensure interoperability with WS-I standards. Optimize message transmission using MTOM or SOAP with Attachments (SWA). Develop and design RESTful APIs and microservices. Apply web services technologies including XML, JAXP, JAXB, JAX-WS, Axis, Jersey, JSON, CXF, REST, and SOAP. Apply security technologies including LTPA and OAuth2/JWT. Data Access and Databases Develop the Data Access Layer (DAO) to interface applications with IBM DB2 9.0 and PostgreSQL databases running on z/OS mainframe and Linux operating systems and other platforms. Use JPA or Spring Data API for querying and retrieving data through Object Relational Mapping (ORM). Implement efficient data processing pipelines using asynchronous processing, caching strategies, and load balancing. Testing and Quality Create POCs and templates for Behavior Driven Development (BDD) test frameworks for APIs using Cucumber, Gherkin, and Java to implement integration tests. Develop unit test cases for Java classes using real scenarios with JUnit, Mockito, and PowerMock frameworks. Apply automated unit testing, Test Driven Development (TDD), and BDD using Cucumber. Use static code analyzers such as SonarQube and address recommended technical debt, including bugs, vulnerabilities, and hotspots. Identify and address security vulnerabilities in web applications. Architecture and Documentation Use Visio, Confluence, and IT Governance Frameworks to document solution architecture and develop UML-based design documents. Attend customer technical discussions, design meetings, and development meetings. Provide viable technical solutions to enhance existing architecture and improve code quality and processes. Technical Leadership and Collaboration Collaborate with cross-functional teams, including business analysts, QA, and project managers. Serve as a hands-on Technical Lead. Provide guidance and support to junior and mid-level developers. Maintain a commitment to continuous learning and staying current with emerging technologies. Perform all other duties as assigned or directed. Qualifications Education Bachelor's degree in Computer Science, Mathematics, Engineering, or a related field [Required]. A master's or doctorate degree may substitute for required experience. Experience 10+ years of experience with Java, Spring Boot, Angular, and React [Required]. Extensive design and programming experience with Java and JEE technologies [Required]. Extensive hands-on experience with one or more frameworks such as Angular, React, and Express/Node.js [Required]. Hands-on experience as a Technical Lead [Required]. Experience working on Agile projects and strong knowledge of Agile terminology and tools, including Agility [Required]. Experience designing high-throughput and low-latency systems, including scalable solutions capable of handling large volumes of concurrent requests with minimal response times [Required]. Experience developing applications using Single-Page Application architecture [Required]. Experience designing and deploying cloud-native applications onto AWS with PostgreSQL [Required]. Experience with modern software development tools for continuous integration, including Jenkins, Git/Bitbucket, Jira, Nexus, Maven, SonarQube, Fortify, and UrbanCode Deploy [Required]. Experience with web services technologies including XML, JAXP, JAXB, JAX-WS, Axis, Jersey, JSON, CXF, REST, and SOAP, as well as security technologies including LTPA and OAuth2/JWT [Required]. Hands-on design and development experience with microservices and RESTful APIs [Required]. Experience with automated unit testing, TDD, and BDD using Cucumber [Required]. Experience with JEE technologies including Struts, Spring Framework, Spring Boot, Spring JDBC, JPA, Hibernate, SOAP/RESTful services, XML, DB2, Tomcat, and WebSphere [Required]. Experience using static code analyzers such as SonarQube and addressing recommended technical debt [Required]. Experience with performance tuning software applications for CPU and memory utilization, response time, and scalability in cloud environments [Required]. Clearance Ability to obtain and maintain a public trust clearance [Required]. Other Requirements Willingness to work on-site in Woodlawn, MD, 5 days a week [Required]. Preferred Qualifications Skills Proficiency in designing and implementing Kafka-based event-driven architectures, including Kafka producers, consumers, topics, partitions, and consumer groups. Experience configuring Kafka brokers, managing message retention policies, and optimizing throughput through replication and partitioning strategies. Familiarity with Kafka Connect for data ingestion and Kafka Streams for real-time data processing. Experience monitoring Kafka clusters for performance and reliability. Strong understanding of the latest trends in Artificial Intelligence (AI) and the ability to apply AI knowledge to enhance or redesign existing system architectures. Experience identifying opportunities where AI-driven solutions can add value, improve efficiency, or enable new capabilities. Experience implementing Section 508 standards for web applications. Exposure to writing technical white papers and systems design documents. Prior experience with federal or state government IT projects. Experience with low-code platforms such as ServiceNow, Pega, and Microsoft Power Platform.