Software Engineer- Enterprise Application Modernization

Leidos Holding$107K — $195K *
Enterprise Technology
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • US security clearance: TS/SCI with Polygraph is required.
  • Bachelor's degree in computer science or related discipline.
  • 8+ years of software engineering experience on similar programs.
  • Proven experience with Java enterprise applications.
  • Experience with Spring Boot and Angular frameworks.
  • Familiarity with RESTful APIs and relational databases.
  • Knowledge of containerization and microservices is a plus.

Responsibilities

  • Analyze user and system requirements for application development.
  • Design and support RESTful APIs and service integrations.
  • Drive application modernization initiatives including migration to Spring Boot.
  • Deploy and support containerized applications in Kubernetes environments.
  • Engage in architecture and code reviews for continuous improvement.
  • Develop automated tests and maintain CI/CD pipelines.
  • Provide cross-support for database administration across various platforms.

Benefits

  • Opportunity to modernize mission-critical enterprise applications.
  • Work with cutting-edge technology like Spring Boot and Kubernetes.
  • Influence technical design decisions and future system architecture.
  • Collaborate within an Agile team environment.
  • Access to training and development resources through the company.
Full Job Description
Leidos is seeking a Software Engineer to join an Agile development team supporting the modernization and enhancement of a mission-critical enterprise application. This position offers the opportunity to modernize a Java-based system by migrating from a traditional Apache Tomcat deployment to a cloud-native architecture built on Spring Boot, Docker, Kubernetes, Angular, and modern software engineering practices. The ideal candidate is passionate about modern software engineering and enjoys modernizing existing enterprise applications using Java, Spring Boot, RESTful APIs, relational databases, and container technologies. The successful candidate will have the opportunity to influence technical design decisions while helping shape the future architecture of a mission-critical system.
  • Analyze user and system requirements to design, develop, test, and maintain Java and Angular applications.
  • Design, develop, and support RESTful APIs, service integrations, and data access components for Oracle, PostgreSQL, and other relational databases.
  • Support application modernization initiatives, including Spring Boot migration, database modernization, microservices, and containerization.
  • Deploy and support containerized applications in Kubernetes environments across cloud and on-premises infrastructure.
  • Participate in architecture reviews, code reviews, troubleshooting, technical design, and continuous process improvement.
  • Develop automated unit and integration tests, support CI/CD pipelines, and maintain technical documentation using Confluence and Jira.
  • Provide backup database administration support for Oracle, PostgreSQL, and MariaDB while cross-training across application, database, and deployment technologies to ensure operational continuity.


Required Qualifications
  • TS/SCI with Polygraph.
  • Bachelor's degree in computer science or related discipline from an accredited college or university.
  • Minimum eight (8) years of software engineering experience on programs and contracts of similar scope, type, and complexity.


Preferred Qualifications
  • Experience developing Java enterprise applications using Spring Boot (or similar frameworks) and Angular (or comparable front-end technologies).
  • Experience designing and implementing RESTful APIs and integrating applications with Oracle, PostgreSQL, MariaDB, or other relational databases.
  • Experience with application modernization, including Spring Boot migrations, microservices, and database modernization initiatives.
  • Experience developing, deploying, and supporting containerized applications using Docker, Podman, and Kubernetes platforms (e.g., Rancher, Amazon EKS, OpenShift).
  • Familiarity with Kubernetes concepts including Deployments, Services, ConfigMaps, Secrets, Ingress, Persistent Volumes, Helm charts, and cloud-native architectures.
  • Experience implementing GitLab CI/CD pipelines, automated testing, DevSecOps practices, and modern software delivery processes.
  • Experience using Jira and Confluence in Agile environments, providing database operational support, and working with XML, JSON, or other structured data formats.


Original Posting:
July 27, 2026

Pay Range:
Pay Range $107,900.00 - $195,050.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

About Leidos Holding

Leidos Holding Careers

Joining Leidos Holding presents an unparalleled opportunity to advance one's career with a leader in innovation and technology. The company offers a plethora of job opportunities aimed at fostering professional growth and development in a diverse and inclusive environment.

Explore Career Opportunities

Leidos Holding is actively seeking skilled professionals who are passionate about leveraging their expertise to drive innovation and leadership in their fields. With a variety of open positions, Leidos Holding provides a platform for individuals to challenge themselves in a dynamic work environment.

Innovation and Professional Growth

At Leidos Holding, innovation is at the core of everything they do. Employees are encouraged to think creatively and push boundaries. The company supports this drive for innovation through comprehensive professional development and diversity training programs that are designed to enhance skills and foster leadership.

Commitment to Diversity and Inclusion

Leidos Holding is committed to creating a workplace where diversity is not only recognized but celebrated. With a culture that values and promotes diversity, Leidos Holding ensures that all team members have the opportunity to contribute, learn, and grow.

Internship Programs

For those starting their career, Leidos Holding offers internship programs that provide a robust foundation in the industry. Internships are a great way to develop essential skills, gain valuable work experience, and build professional networks.

Benefits and Culture

Employees at Leidos Holding enjoy a range of benefits designed to support their professional and personal lives. The company culture is built on a foundation of respect and integrity, providing a supportive and collaborative environment where every team member is valued.

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Leidos Holding is hiring! Explore job opportunities that match your skills and interests. Leidos Holding looks for driven, curious, and innovative individuals to join their team. Positions are available across various disciplines and experience levels.

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Networking and Career Advancement

Leidos Holding encourages its employees to engage in networking within the company to discover new opportunities for career advancement. The leadership team at Leidos Holding is dedicated to supporting employees in their career paths with ample opportunities for networking and growth.

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Discover the exciting career opportunities at Leidos Holding today. With a commitment to employee growth, innovation, and diversity, Leidos Holding is the perfect place to advance your career. Check out the latest job listings and find your perfect fit at Leidos Holding.

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