Full Stack Developer

Job Description

Leidos is looking for a Full Stack Software Developer with a current TS-SCI Clearance in Key West, FL or remote worker. The program provides sustainment support for Mission-Critical applications and capabilities. Each system has its own specific requirements and infrastructure. Our effort encompasses system development, update and integration relying on sound data science to aggregate and correlate multiple datasets federated from multiple computing platforms and frameworks to update a family of systems that are unique to the environment. This work requires extensive knowledge in common high-level programming language, Web markup and programming languages and an understanding of low-level languages. Examples of the types of languages and tools requiring proficiency as part of these programming activities are below, this list may not be all inclusive: Leadership skills are highly desired.

We are seeking technical, self-motivated Application developer , to be versatile and flexible to changing priorities from multiple customers. Candidates must work well in an Agile Scrum environment.

Primary Responsibilities

• Design, Build, Test software upgrades and modifications
• Troubleshoot software and system issues in an Agile scrum team
• Analyze and suggest environment and process upgrades where appropriate
• Implement COTS, and other third party, product updates

Basic Qualifications:

• BS Degree and 4+ years experience (or relevant experience in lieu of degree).
• Must currently possess an active Secret clearance for remote support OR TS/SCI for on-site support.
• Experience with Java, JavaScript, Angular, Node.js, ReactJS, C# and CSS, HTML/XHTML, Loopback
• Experience with Rest APIs, JSON, SOAP
• Experience with Docker and Kubernetes
• Experience with Code repositories, (i.e. GIT/SVN)
• Experience with Postgre SQL
• Experience with JIRA and Confluence
• Experience setting up and working with virtual environments, (VBOX, VM, Oracle)
• Experience with Windows, Solaris/Linux OS (scripting, command line)
• Troubleshooting and problem solving skills, with the use of debuggers

Preferred Qualifications:

• TS/SCI on-site worker in Key West, FL
• Experience working with and troubleshooting Mission Critical applications in an Operations environment
• Experience with AI/ML development
• Experience with SAFe Agile of other Agile SW development methodologies
• Experience with Subversion/JIRA
• Experience working in Cloud architecture and/or application transitions to the Cloud

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 15, 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 $87,100.00 - $157,450.00

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.