Logo-of-Rivermatrix-Technologies,-Inc.-hiring-for-jobs-in-US-on-GrabJobs

Principal Software Engineer, TS /SCI with Polygraph

salary Salary :

$160,000 - 260,000 yearly

Job Description - Principal Software Engineer, TS /SCI with Polygraph




Rivermatrix is seeking a Software Engineer to join an experienced team working on efforts to modernize an existing data tracking and metrics system. The User Experience (UX) developer should be able to focus on developing highly usable end user interfaces, applying UI best practices, and UX principles.







Rivermatrix is a small, technology first shop committed to delivering great work and treating our folks well. Joining Rivermatrix means being a valued member of a small team, not just a number lost in a crowd. We approach our work with creativity, mission-focus, and a passion for quality and results. Rivermatrix is built lean so we can drive resources towards what counts; our employees. We believe that the quality of our staff, focus on building good technology (not just the bottom line), competitive salaries, great benefits, and employee investment are the foundation for our continued success.











Salary Range: $160,000 - $260,000. This is not a guarantee of compensation or salary. Salary will be set based on education, experience, geographic location and possibly contractual requirements and could fall outside of this range.
















Rivermatrix Values:











TECHNOLOGY FIRST











There are no shareholders or investment firms to report to. Our sole focus is building good technology.











EMPLOYEE FOCUSED











Our employees are our lifeblood. Their hard work and ingenuity is what drives our success.











QUALITY OVER QUANTITY











We eschew the "butts in seats" mentality present in our industry to focus on building good technology as the driver of our growth.






Requirements



The Software Engineer, shall have at least the following experience:



  • Twenty (20) years of experience as a Software Engineer (SWE) supporting programs and contracts of similar scope, type, and complexity.

  • Bachelor’s degree in Computer Science or a related discipline from an accredited college or university. Note: Four (4) additional years of SWE experience on projects with similar software processes may be substituted for a bachelor’s degree.

  • Five (5) years of experience with a strong background in user-centered design, UI best practices, usability testing, and the software development lifecycle (analysis, design, implementation, and deployment).

  • Demonstrate working knowledge of Linux, CSS, JavaScript, and HTML to support UI design, troubleshoot design-related issues, and collaborate with development teams.

  • Work closely with users (analysts) to research, develop, and document user profiles and user performance requirements.

  • Conduct task analysis and workflow mapping and develop and test user scenarios.

  • Develop UI design specifications and support documentation (e.g., wireframes, mockups, interaction behaviors, and design guidelines), as needed to support development efforts.

  • Collaborate with product designers and process engineers to inform application design and ensure user-centered solutions align with workflows and requirements.

  • Conduct accessibility and 508 compliance testing to ensure user interfaces meet regulatory and usability standards.

  • Collect and analyze user feedback through surveys and behavioral data to guide design improvements and UX decisions.

  • Work independently while collaborating effectively with small teams and larger cross-functional groups.

  • Create interactive prototypes to validate design concepts and communicate interactions to stakeholders and development teams.



Required Skills:



  • UI/UX experience

  • 508 Compliance

  • TS/SCI clearance with polygraph clearance required



Additional Desired Qualifications:



  • Experience with the following:

  • CSS, Javascript, HTML, Adobe Suite






Benefits



Rivermatrix offers a well rounded benefits package to include: PTO, 401(k), Health, Dental, Vision, Life, Flexible Spending, Professional Development, Short & Long Term Disability, and much more!







Original job Principal Software Engineer, TS /SCI with Polygraph posted on GrabJobs ©. To flag any issues with this job please use the Report Job button on GrabJobs.
Share Job
Share Job

Similar Principal Software Engineer Jobs in the US

GrabJobs is the no1 job portal in the US, connecting you to thousands of jobs fast! Find the best jobs in the US, apply in 1 click and get a job today!

Mobile Apps

Copyright © 2026 Grabjobs Pte.Ltd. All Rights Reserved.