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

- **Company:** Catalyst
- **Location:** Vienna, VA, United States
- **Experience:** Experienced
- **Salary:** $140,000.0 - $170,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), JavaScript (Programming Language), Microsoft Windows, Agile Methodology, Unit Testing, C++ (Programming Language), Software Design Patterns, Linux, Python (Programming Language), Systems Development Life Cycle, Secure Coding, Software Engineering, Software Systems, Infrastructure Automation Frameworks, Information Technology, Software Version Control, Programming Languages
- **Published:** July 29, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=db34d8dcf99573ab

## About the Role

* Bachelor's degree in Computer Science, Engineering, or a related field and 3-6 years of relevant professional software engineering experience; equivalent combination of education and experience may be considered, * Proficiency in one or more modern programming languages (e.g., Java, Python, C/C++, JavaScript)
 * Solid experience across the software development lifecycle (SDLC), including coding, unit testing, and integration
 * Experience working within Agile/Scrum development teams
 * Experience with version control and configuration management tools
 * Experience developing on Windows and/or Linux operating systems
 * Working understanding of modern software design patterns and secure coding standards
 * Strong written and oral communication skills, with the ability to collaborate effectively across a development team

## Description

Mid-Level Software Engineers support the design, development, and delivery of software systems in support of the customer's requirements, working both individually and as members of an Agile development team. Mid-Level Software Engineers take ownership of user stories from implementation through unit testing and integration, contribute to design discussions, and support documentation efforts. Mid-Level Software Engineers are expected to work with growing independence while continuing to build technical depth and may begin providing informal guidance to more junior engineers.


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