Backend Python Engineer - Polygraph Required
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Before you apply
Salary$97k – $248k
LocationChantilly, VA, Chantilly, VA
Typefull-time
DepartmentMosaic
Company size51–200 people
PostedSep 15, 2026 · 1mo ago
Verified live1d ago
At a glanceSummarised by Seekless from the posting.
Active TS/SCI with Polygraph at time of application
Experience developing backend services using Python and a modern web framework such as FastAPI, Flask, Django, or Chalice
Experience with source control (e.g. Git) and CI/CD pipeline tools such as GitHub Actions, 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 or unittest
Experience with Python project management, dependency management tools, and build tools such as poetry, make, uv, pip, or conda
Familiarity with API standards such as REST and HTTP, message-driven architectures, persistent storage layers, and distributed systems
Effective written and verbal communication skills necessary to perform job duties and collaborate with team members
Contributions to open-source libraries or community projects or personal projects
Experience with search technologies such as OpenSearch, Elasticsearch, or Solr
Experience working with streaming or event-driven architectures such as SNS/SQS, Kafka, Kinesis, AWS Step Functions, or EventBridge
Knowledge of Infrastructure as Code (e.g., Terraform) and how to leverage DevSecOps pipelines to deliver code
Skills
Python
FastAPI
Flask
Django
Chalice
Git
GitHub Actions
GitLab CI
AWS CodeBuild
Jenkins
AWS
PyTest
unittest
poetry
make
uv
pip
conda
REST
HTTP
OpenSearch
Elasticsearch
Solr
SNS
SQS
Kafka
Kinesis
AWS Step Functions
EventBridge
Terraform
CI/CD
Benefits
Health insurance
Performance bonus
Tuition reimbursement
PTO
401(k)
Social events
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.
About the role
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
Required Qualifications:
•
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
•
Experience with Python project management, dependency management tools, and build tools such as poetry (preferred), make, uv, pip, or conda
•
Familiarity with API standards such as REST and HTTP, message-driven architectures, persistent storage layers, and distributed systems
•
Effective written and verbal communication skills necessary to perform job duties and collaborate with team members
Preferred Qualifications:
•
Contributions to open-source libraries or community projects or personal projects
•
Experience with search technologies such as OpenSearch (preferred), Elasticsearch, or Solr
•
Experience working with streaming or event-driven architectures such as SNS/SQS (preferred), Kafka, Kinesis, AWS Step Functions, or Event Bridge
•
Knowledge of Infrastructure as Code (e.g., Terraform) and how to leverage DevSecOps pipelines to deliver code
The base salary pay range for this role is $114,000 - $247,900. This range reflects base compensation only and does not include benefits, bonuses, or additional pay incentives associated with the opportunity.
BTI360 benefits for full-time teammates
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Fully paid healthcare premiums
•
Competitive salaries and performance bonuses
•
Career development and in-house training
•
Tuition Reimbursement
•
Up to 5 weeks PTO plus 2 weeks of federal holidays
•
401K dollar for dollar matching up to 6% annually - vested immediately on day 1
•
Giving Back: Serving communities locally and across the globe
•
Social Events (happy hours, golf tournament, BTI360 Family Festival and more)
Commitment to Fairness and Inclusion
At BTI360, we believe that unlocking the potential of others is not just a mission—it’s the heart of our culture. We are committed to fostering an inclusive environment where every individual can grow each day, lead with humility, and do the right thing. Our core values guide us in developing software that makes a difference, primarily serving national security customers in the Washington, DC metropolitan area.
We are an Equal Opportunity Employer. We do not discriminate against any employee or applicant based on race, color, religion, gender, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other legally protected characteristics. We celebrate fairness and are dedicated to creating an environment of mutual respect and inclusion where everyone can bring their true selves to work.
Join us in a workplace where your contributions are valued, your growth is encouraged, and your potential is unlocked. Together, we develop great software fast and deliver exceptional solutions for our customers.