Senior Software Developer

Leidos; Chantilly (VA); On-site; USD 154,000 - 278,000; Full time

Job summary

Leidos in Chantilly, VA seeks a Senior Software Developer to rapidly deliver front-end and back-end software in a mission-focused environment. You will work with customers to translate evolving requirements into practical, scalable software solutions and support the full development lifecycle.

The role requires a TS/SCI clearance with a willingness to polygraph and extensive experience across Java, C#/.NET, and Python, plus modern JavaScript (React/Node/Next) and databases (MySQL, MongoDB).

Qualifications

• Bachelor's degree required in a technical field.
• 15+ years of relevant software development experience.
• Active TS/SCI clearance and willingness for a polygraph.

Responsibilities

• Design, develop, maintain, and enhance mission-critical software applications.
• Rapidly deliver software solutions for evolving operational needs.
• Develop front-end and back-end components for data-analysis requirements.
• Work with customers and end users to translate requirements into technical solutions.
• Develop applications for analyzing and visualizing large datasets, including geospatial data.
• Troubleshoot issues across software, system, and data domains.
• Participate in the full software development lifecycle from requirements to sustainment.
• Research and integrate new technologies as mission needs evolve.

Skills

Java

C#/.NET

Python

React.js

Node.js

Next.js

MySQL

MongoDB

UI/UX design

Windows and Linux

Education

Bachelor's degree in Computer Science/IT or related field

Tools

Git

Subversion

Docker

Kubernetes

Job description

Leidos is seeking a Senior Software Developer to support the rapid development of operations, data analysis, and data visualization applications in a dynamic mission environment. This is a fast-paced development environment where emerging operational needs often require quick, practical software solutions that can be deployed rapidly and refined over time. The successful candidate will work closely with the customer and end users to understand evolving requirements, solve complex data-driven problems, and deliver effective solutions across both front-end and back-end environments. The role supports the full software development lifecycle, including requirements analysis, design and development, troubleshooting, deployment, system backup and recovery, and enhancement of both existing and new applications.

This position is located in Chantilly, VA.

CLEARANCE REQUIREMENT: Candidates must currently possess an active TS/SCI clearance and be willing and able to undergo a polygraph. Candidates who do not currently possess an active TS/SCI will not be reviewed or considered.

Primary Responsibilities

• Design, develop, maintain, and enhance mission-critical software applications.
• Rapidly develop and deliver software solutions in response to emerging operational needs and evolving requirements.
• Develop both front-end and back-end components in support of operational and data-analysis requirements.
• Work directly with customers and end users to gather requirements and translate operational needs into technical solutions.
• Develop applications supporting the analysis and visualization of large and complex datasets, including geospatial data.
• Troubleshoot and resolve complex software, system, and data-related issues.
• Participate throughout the software development lifecycle, including requirements, design, development, testing, deployment, and sustainment.
• Research and integrate new technologies as mission and technical requirements evolve.

Basic Qualifications

• Bachelor's degree in Computer Science, Information Technology, or related technical field.
• 15+ years of relevant software development experience.
• Current/active TS/SCI security clearance and willingness to undergo a polygraph.
• Demonstrated experience rapidly developing and delivering software solutions in response to time-sensitive or evolving operational requirements.
• Experience developing applications using an object-oriented programming language such as Java or C#/.NET.
• Experience developing in Python.
• Experience with modern JavaScript frameworks such as React.js, Node.js, or Next.js.
• Experience with both relational and non-relational databases, such as MySQL and MongoDB.
• Experience developing software that processes, analyzes, or visualizes large or complex datasets.
• Experience with UI/UX design principles and translating user requirements into functional interfaces.
• Experience developing in both Windows and Linux environments.
• Experience with source-code repositories/version control, including Git and/or Subversion.

Preferred Qualifications

• Experience working with geospatial datasets and developing applications supporting geospatial analysis or visualization.
• Experience developing software in support of an operational mission environment.
• Experience with cloud infrastructure and services, including IaaS.
• Experience with ETL processes and large-scale datasets.
• Experience working with data formats including CSV, JSON, and XML.
• Experience with containerization and orchestration technologies, including Docker and Kubernetes.
• Experience with ActiveMQ.

#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

October 6, 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 $154,050.00 - $278,475.00

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] 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.

#Featuredjob