Principal Java Developer

Leidos LLC; Brookmont (MD); On-site; USD 131,300 - 237,350; Full time

Benefits offered by this job

Paid Time Off

11 paid Holidays

401K with 6% company match

Flexible Schedules

Education and Training Support

Parental Paid Leave

Job summary

Leidos seeks a Principal Java Developer to advance mission-critical systems within our Intel Security Sector. You will design and maintain high-performance backend microservices in a DevOps-driven environment, using Java, Spring, and cloud platforms.

In this role you will mentor peers, drive architecture, and participate in full development lifecycle from estimation to deployment, adhering to Agile and SAFe practices with emphasis on security and reliability.

Qualifications

• Experience with Agile practices and SOE environments.
• Strong Java and Spring Framework, microservices design and RESTful APIs.
• DevOps toolchains and modern cloud platforms (AWS/GCP/Azure).
• Testing with JUnit, scripting in Python and Bash; CI/CD workflows.
• Knowledge of data stores including SQL/NoSQL; Git-based version control.
• Active TS/SCI clearance with polygraph is required.

Responsibilities

• Design, develop, test and maintain scalable Java backend microservices.
• Shape backend architecture, mentor teammates, and conduct code reviews.
• Implement validation and testing with JUnit and automated tools.
• Prototype and deploy solutions on cloud platforms leveraging platform services.
• Coordinate infra needs with DevOps for mission-focused requirements.
• Support SAFe practices and align user stories with customer use cases.
• Document deployment of artifacts across environments using GitFlow and scripts.

Skills

Java

Spring Framework

Microservices architecture

RESTful APIs

Agile development

DevOps collaboration

Python

Bash

Education

Bachelor’s degree + 12+ years

Master’s degree + 10+ years

Active TS/SCI with polygraph clearance

Tools

GitHub

Jenkins

AWS

Google Cloud

Azure

S3

RDS

EFS

Elasticsearch

Postgres

DynamoDB

Kafka

AWS SQS/SNS

AWS Lambda

Job description

Leidos has an exciting opportunity for a Principal Java Developer in our Intel Security Sector's Analysis Solutions Business Area. Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management.

At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more.

Job Summary A Java developer on this program provides Agile development and operations and maintenance for mission critical systems. Based in DevOps framework, this role participates in major deliverables of projects through all aspects of the software development lifecycle including scope and work estimation, architecture and design, coding and unit testing.

Primary Responsibilities:

• Design, develop, test and maintain high-performance, scalable backend microservices using Java and the Spring Framework to meet customer information technology needs.
• Participates in software programming initiatives, shaping backend architecture, mentoring team members, and conducting code reviews.
• Develops and directs software system validation and testing methods using Junit and Katalon and uses integrated custom developed software solutions to leverage automated deployment technologies.
• Develop, prototype and deploy solutions within a cloud-based platform leveraging platform services.
• Analyze (though proof of concept, performance, and end-to-end testing) and effectively coordinate Infrastructure needs driven by developed software to meet customer mission needs.
• Support the Agile software development lifecycle following Program SAFe practices while coordinating closely with team members, Product Owners and Scrum Masters to ensure User Story alignment and implementation to customer use cases.
• Document and perform systems software development, including deployment of build artifacts across different environments leveraging GitFlow constructs and using industry leading DevOps tools like GitHub, Jenkins, and scripting (e.g., python, bash).
• Apply and identify software development best practices and standard operating procedures creating innovative solutions to meet the technical needs of customers.

Basic Qualifications:

• In-depth experience in common Agile practices, service-orientated environments, and 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 within DevOps toolsets/practices
• Direct experience utilizing software testing performance tools, such as Junit and scripting languages, such as Python, and Bash while working in an Agile development environment.
• In-depth experience with development in Commercial Cloud Platforms (ex, AWS, Google Cloud, Azure) and leveraging cloud data services (ex: S3, RDS, EFS).
• In-depth experience using version control systems and issue/problem tracking systems.
• Bachelor’s degree with 12 or more years of prior relevant experience or Master’s degree with 10 or more years of relevant experience. Additional years of experience may be substituted in lieu of a degree.
• To be considered must have an active TS/SCI with polygraph security clearance.

Preferred Qualifications:

• Experience with writing software that interfaces with data technologies like Elasticsearch, Postgres, DynamoDB, Kafka, AWS SQS/SNS, AWS Lambda, and AWS S3.
• Experience with SAFe development practices.

CABARESTON If you're looking for comfort, keep scrolling.

At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting: January 21, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range: Pay Range $131,300.00 - $237,350.00 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.

Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.