Backend Python Engineer - Polygraph Required
bti36021
Chantilly, VA
Posted Sep 15, 2026
- Other
- Mosaic
Job description
**About the Team** Here at BTI360, we’ve built a culture that’s passionate about developing software engineers. Software doesn't build itself. People do. In fact, teams of people do. That's why our primary focus is on developing better craftsmen, better teammates, and better technical leaders. By putting people first, we're not just giving our teammates more opportunities to grow, we're also raising the bar of the software we ship. BTI360 previously has been voted 10 years in a row as a TOP Place to Work by the Washington Business Journal. We are currently seeking a Backend Python Software Engineer to join a high-impact team reimagining the U.S. government's terrorist screening process through user-centered design techniques and close collaboration with mission users. We are a fast-moving and fun team, building our system from the ground up with solid cloud-native architecture, including a powerful CI/CD pipeline for fast, repeatable development and deployments. We use modern UI design principles to create an intuitive and useable interface, allowing users to process tasking in half the time. If you thrive on high-stakes impact, elegant engineering, and are interested in making a significant impact for our national security, this mission is calling. **What you will do in this role:** - Work closely with teammates and stakeholders in a Lean Agile environment to build mission-critical production applications focused on data discovery and analysis - Participate in code reviews, system design discussions, and continuous improvement initiatives - Leverage modern build tools, testing frameworks, and CI/CD pipelines to ensure quality and delivery speed - Design, implement, and test backend services and APIs using reactive programming concepts for production applications - Integrate with cloud services and data platforms to expose high-value data through secure, performant interfaces - Leverage DevSecOps pipelines, containers, and modern deployment tools to deliver software efficiently and reliably **Minimum Requirements to be Considered for this Role:** - Active TS/SCI with Polygraph at time of application - Experience developing backend services using Python and a modern web framework such a s Fast API (preferred), Flask, Django, or Chalice - Experience with source control (e.g. Git) and CI/CD pipeline tools such as GitHub Actions (preferred), GitLab CI, AWS CodeBuild, or Jenkins. - Experience designing and implementing scalable, maintainable, and OOP based software in a containerized cloud environment (AWS preferred) leveraging foundational services for computing, identity management, and networking. - Experience with testing frameworks such as PyTest (preferred) or unittest