Software Engineer Expert

Leidos; Chantilly (VA); On-site; USD 131,000 - 237,000; Full time

Job summary

Leidos is seeking a Full Stack Developer to join a team delivering software for entitlement programs and IdAM/ICAM, with a focus on authentication, authorization, attributes, and digital policy management.

The role involves designing, developing, and maintaining cloud-enabled applications, coordinating with cross-functional teams, and ensuring robust software systems and documentation. A TS/SCI clearance with polygraph is required, along with substantial web software experience.

Qualifications

• Active TS/SCI with Polygraph required.
• Demonstrated experience in multiple programming languages (Java, JavaScript, Python, XML).
• Experience managing and developing web software.
• Demonstrated experience with cloud services.
• Experience in Windows and/or Unix.

Responsibilities

• Designs, develops, and maintains web-based applications.
• Experience with cloud services and transitioning legacy applications to the cloud.
• Collaborate with systems analysts, engineers, programmers and other stakeholders to define requirements and interfaces.
• Develop unit and integration tests and ensure software reliability and performance.
• Prepare and maintain program documentation and user guides.

Skills

Active TS/SCI with Polygraph

Multiple programming languages (Java,

Education

BS degree or higher

Job description

Description

Leidos has immediate opportunities for a Full Stack Developer to join a team building innovative software supporting the Sponsor's Entitlement Programs as well as IdAM /ICAM, Authentication, Authorization, Attributes and Digital Policy Management. We're supporting a well-established customer that is responsible for critical and high-visibility missions applications used by a wide audience. Our team is tremendously talented, and we need to add a talented and creative Full-Stack Developer to the team.

• Experience with VUE or React
• Provide database architectural and design capabilities
• Develop unit and functional test plan
• Provide the operations and maintenance of operational systems
• Modify existing software to correct errors, allow it to adapt to new hardware, or to improve its performance
• Analyze user needs and software requirements to determine feasibility of design within time and cost restraints
• Consult with customers about software system design and maintenance
• Coordinate software system installation and monitor equipment functioning to ensure specifications are met Design, develop, and modify software systems, using scientific analysis and mathematical models to predict and measure outcome and consequence of design
• Develop and direct software system testing and validation procedures, programming, and documentation
• Confer with systems analysts, engineers, programmers and others to obtain information on project limitations and capabilities, performance requirements and interfaces
• Correct errors by making appropriate changes and then recheck the program to ensure that the desired results are produced
• Conduct trial runs of program and software applications to be sure they will produce the desired information and that the instructions are correct
• Compile and write documentation of program development and subsequent revisions, inserting comments in the coded instruction so others can understand the program
• Write, update, and maintain computer programs or software packages to handle specific jobs, such as tracking inventory, storing or receiving data, or controlling other equipment
• Consult with managerial, engineering, and technical personnel to clarify program intent, identify problems, and suggest changes
• Perform or direct revision, repair, or expansion of existing programs to increase operating efficiency or adapt to new requirements
• Written, analyze, review, and rewrite programs, using workflow chart and diagram, and applying knowledge of computer capabilities, subject matter, and symbolic logic
• Write or contribute to instructions or manuals to guide end users
• Investigate whether networks, workstations, the central processing unit of the system, or peripheral equipment are responding to a program’s instructions
• Prepare detailed workflow charts and diagrams that describe input, output, and logical operational, and convert them into a series of instructions coded in a computer language
• Consult with and assist computer operators or system analysts to define and resolve problems in running computer programs
• Assign, coordinate, and review work and activities of programming personnel
• Designs, Develops, and Maintains applications within the cloud environment. This can be for new applications development or the transition of legacy applications to the cloud environment.

Description

Leidos has immediate opportunities for a Full Stack Developer to join a team building innovative software supporting the Sponsor's Entitlement Programs as well as IdAM /ICAM, Authentication, Authorization, Attributes and Digital Policy Management. We're supporting a well-established customer that is responsible for critical and high-visibility missions applications used by a wide audience. Our team is tremendously talented, and we need to add a talented and creative Full-Stack Developer to the team.

• Experience with VUE or React
• Provide database architectural and design capabilities
• Develop unit and functional test plan
• Provide the operations and maintenance of operational systems
• Modify existing software to correct errors, allow it to adapt to new hardware, or to improve its performance
• Analyze user needs and software requirements to determine feasibility of design within time and cost restraints
• Consult with customers about software system design and maintenance
• Coordinate software system installation and monitor equipment functioning to ensure specifications are met Design, develop, and modify software systems, using scientific analysis and mathematical models to predict and measure outcome and consequence of design
• Develop and direct software system testing and validation procedures, programming, and documentation
• Confer with systems analysts, engineers, programmers and others to obtain information on project limitations and capabilities, performance requirements and interfaces
• Correct errors by making appropriate changes and then recheck the program to ensure that the desired results are produced
• Conduct trial runs of program and software applications to be sure they will produce the desired information and that the instructions are correct
• Compile and write documentation of program development and subsequent revisions, inserting comments in the coded instruction so others can understand the program
• Write, update, and maintain computer programs or software packages to handle specific jobs, such as tracking inventory, storing or receiving data, or controlling other equipment
• Consult with managerial, engineering, and technical personnel to clarify program intent, identify problems, and suggest changes
• Perform or direct revision, repair, or expansion of existing programs to increase operating efficiency or adapt to new requirements
• Written, analyze, review, and rewrite programs, using workflow chart and diagram, and applying knowledge of computer capabilities, subject matter, and symbolic logic
• Write or contribute to instructions or manuals to guide end users
• Investigate whether networks, workstations, the central processing unit of the system, or peripheral equipment are responding to a program’s instructions
• Prepare detailed workflow charts and diagrams that describe input, output, and logical operational, and convert them into a series of instructions coded in a computer language
• Consult with and assist computer operators or system analysts to define and resolve problems in running computer programs
• Assign, coordinate, and review work and activities of programming personnel
• Designs, Develops, and Maintains applications within the cloud environment. This can be for new applications development or the transition of legacy applications to the cloud environment.

Required Quals

• Active TS/SCI with Polygraph
• Requires BS degree and 12+ years of prior relevant experience. Additional experience in lieu of degree.
• Demonstrated experience in multiple programming languages (Java, JavaScript, Python, and/or XML)
• Experience managing and developing web software
• Demonstrated experience with cloud services
• Experience in Windows and/or Unix

FIP

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 11, 2026

Pay Range

Pay Range $131,300.00 - $237,350.00

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.