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# Software Developer (Mid-Level) - TS/SCI with Polygraph Required

- **Company:** Catalyst
- **Location:** Vienna, VA, United States
- **Experience:** Experienced
- **Salary:** $145,000.0 - $175,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), JavaScript (Programming Language), Microsoft Windows, Agile Methodology, Amazon Web Services, Component-Based Software Engineering, Unit Testing, Cloud Computing, Linux, Web Development, Python (Programming Language), Software Engineering, Backend, Containerization, Infrastructure Automation Frameworks, Information Technology, Front End Software Development, Restful APIs, Software Version Control, Docker, Programming Languages
- **Published:** July 29, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=c04ac0c4ecb2bbeb

## About the Role

US Citizenships and TS/SCI with Polygraph (no exceptions), * Bachelor's degree in Computer Science, Engineering, or a related field and 3-6 years of relevant professional software development experience; equivalent combination of education and experience may be considered, * Proficiency in one or more modern programming languages (e.g., Java, JavaScript, Python)

 * Experience with front-end and back-end web application development
 * Experience designing and consuming RESTful APIs
 * Experience working within Agile/Scrum development teams
 * Experience with version control and configuration management tools
 * Experience developing on Windows and/or Linux operating systems
 * Familiarity with cloud platforms and containerization technologies (e.g., AWS, Docker)
 * Strong written and oral communication skills, with the ability to collaborate effectively across a development team

## Description

Mid-Level Software Developers support the design, development, and delivery of front-end and back-end application components in support of the customer's requirements, working both individually and as members of an Agile development team. Mid-Level Software Developers take ownership of user stories from implementation through unit testing and integration, contribute to design discussions, and support the build-out of RESTful services and application interfaces. Mid-Level Software Developers are expected to work with growing independence across the full stack while continuing to build technical depth.


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