Principal Software Engineer

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 ResponsibilitiesSoftware 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.
  
  

QualificationsEducation

• 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 QualificationsSkills

• 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.