Software Engineer, TS​/SCI Polygraph

Rivermatrix Technologies, Inc. | Full time

Annapolis Junction, United States | Posted on 07/16/2026

• Security Clearance Top Secret SCI/Polygraph
• Experience 20+ Years and Bachelor of Science
• City Annapolis Junction
• State/Province Maryland
• Country United States

Rivermatrix Technologies is seeking a Software Engineer with experience developing and deploying machine learning and artificial intelligence solutions within secure, high-performance computing environments. The selected candidate will work as part of a multidisciplinary engineering team to design, build, and optimize scalable AI/ML capabilities that support mission-critical applications.

This position requires strong software engineering fundamentals combined with hands‑on experience developing machine learning solutions, integrating open-source AI frameworks, and deploying models into production environments. The ideal candidate is comfortable working across the entire machine learning lifecycle—from data ingestion and preparation through model training, evaluation, deployment, and operational support.

• Design, develop, test, and maintain software applications supporting AI/ML capabilities.
• Develop and deploy machine learning models using modern Python-based frameworks.
• Integrate, fine‑tune, and optimize Hugging Face transformer models for mission applications.
• Build and maintain data science workflows supporting data ingestion, preparation, feature engineering, model training, and evaluation.
• Develop scalable ETL pipelines to process structured and unstructured data from multiple sources.
• Work with data lakes and large datasets to support analytics and machine learning initiatives.
• Deploy AI/ML applications using containerization technologies including Docker and Kubernetes.
• Collaborate with data scientists, software engineers, and systems engineers to transition research into operational capabilities.
• Evaluate information retrieval techniques and improve search, ranking, and retrieval performance.
• Optimize model performance, inference speed, and resource utilization across distributed computing environments.
• Develop software that integrates with databases and enterprise data platforms.
• Support cluster‑based computing environments, including job scheduling and workload management.
• Participate in Agile development activities including sprint planning, code reviews, testing, and documentation.
• Troubleshoot production issues and implement performance improvements across AI/ML systems.

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.

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

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

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

• 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.
• Experience developing, training, or integrating machine…