Senior Software Engineer

Leidos Inc; Chantilly (VA); On-site; USD 108,000 - 195,000; Full time

Job summary

Leidos is seeking a Software Developer to join a large technical program in Chantilly, VA. You will develop Java and Python applications, leverage AWS, and work within SAFe Agile practices to modernize legacy systems while ensuring secure, reliable IT operations.

The role involves mentoring junior developers and delivering RESTful services across a collaborative, disciplined team. The ideal candidate will have 8+ years of experience, a Bachelor's degree in a relevant field, and strong skills in

Qualifications

• Bachelor's degree and 8+ years of software development experience.
• Experience with Java, Springboot, Python and AWS.
• Experience reading and developing solutions to customer requirements.
• Knowledge of Git, Jenkins, or Rundeck.
• Experience with RH Linux CLI.

Responsibilities

• Experience modernizing legacy applications and developing new software.
• Strong design, documentation, and communication skills.
• Maintain legacy applications while delivering new features.
• Apply SAFe Agile practices to manage workload.
• Develop RESTful APIs and leverage AWS services.
• Mentor junior developers and promote best practices in a collaborative team.

Skills

Java

Springboot

Python

AWS

REST APIs

Shell/CLI

SAFe Agile

Unit testing

Mentoring

Education

Bachelor's degree in a STEM field

Tools

Git

Jenkins

Rundeck

EC2

Job description

Description

Leidos is seeking a Software Developer for a 200+ FTE technical development program supporting the Sponsor's Entitlement Programs as well as IdAM /ICAM, Authentication, Authorization, Attributes and Digital Policy Management. The Software Engineer will work with a large team of developers, software engineers and data engineers. The successfully candidate will support continuity of our customer's mission by helping to modernize and implement industry standards while ensuring secure, reliable, and uninterrupted availability of IT systems.

Primary Responsibilities

• Experience in modernization of legacy applications (new software development)
• Strong communication, design, and documentation skills
• Comfort and familiarity in maintaining legacy applications
• Strong time and workflow management skills
• Comfort and familiarity designing and utilizing custom ETL methodology
• Knowledge/experience with the development of Cloudformation scripts to generate network and application
• infrastructure in a repeatable fashion
• Ability to write custom scripts to install and configure code in EC2 instances
• Comfort and familiarity in unit testing, peer code review, and automated testing techniques like Selenium (create, edit, maintain, execute)
• Experience with Python.
• Develop Java and Python applications that leverage Neo4j and Elasticsearch
• Ability to Implement NodeJS PM2 for application monitoring and resiliency
• Utilized SAFe agile techniques to manage workload
• Leverage Amazon Web Services
• Experience creating RESTful API
• Willingness to mentor and teach junior developers' community best practices in a constructive fashion
• Work within the parameters of Agile & Scrum methodologies
• Ability to methodically think through new and exciting challenges in a collaborative team environment in order to provide technically sound solutions

Required Skills

• Active TS/SCI with Polygraph
• Bachelor's degree and 8+ years of experience. Additional experience in lieu of degree.
• Must have experience with Java, Springboot, Python and the Cloud / Amazon Web Services
• Prior experience reading and developing solutions to customer requirements
• Knowledge of Git, Jenkins, or Rundeck
• Experiencing working in Command Line (RH Linux)

Desired Skills

• Experience with Angular is preferred
• Certification - Amazon Web Services (AWS)
• Understanding and knowledge with Identity and Accessibility development practices
• Experience with automation methodologies like Selenium
• Experience with containerization and modular development
• Familiarity with UI/UX Design
• Full Stack Development

FIP

#MSBA

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:August 26, 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 $107,900.00 - $195,050.00

The Leidos pay range for this job level is a general guideline onlyand 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

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 $16.7 billion for the fiscal year ended January 3, 2025. 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 at www.leidos.com/careers/pay-benefits.

Securing Your Data

Beware of fake employment opportunities using Leidos' name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [e-mail].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

Commitment to Non-Discrimination

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.