Full Stack Developer; C#

Full Stack Developer (C#)

Location:

Ashburn, VA (Northern Virginia). Hybrid schedule required (remote/onsite). Job Category:
Information Technology. Time Type:
Full time. Employee Type:
Regular. Travel:
Up to 10% local. Clearance:
None.

CACI is seeking a C# Software Engineer to join our BEAGLE (Border Enforcement Applications for Government Leveraging-Edge Information Technology) Agile Solution Factory (ASF) Team supporting Customs and Border Protection (CBP) clients located in Northern Virginia. Join this passionate team of industry‑leading individuals supporting best practices in agile software development for the Department of Homeland Security (DHS). You will support the men and women charged with safeguarding the American people and enhancing the nation’s safety and security.

• Design, develop, and implement robust, scalable, and secure backend microservices and APIs using C# and the .NET ecosystem for critical CBP applications.
• Implement data solutions, integrating with and managing various data sources, including relational databases (e.g., Postgre
  
  SQL, Oracle) and No
  
  SQL databases (e.g., Mongo
  
  DB), as well as event streaming platforms like Kafka.
• Develop and deploy cloud‑native applications, focusing on performance, scalability, and resilience within a modern cloud environment.
• Actively participate in all Agile Scrum ceremonies (e.g., daily stand‑ups, sprint planning, backlog refinement, sprint reviews, and retrospectives) and collaborate closely with product owners, stakeholders, and other developers.
• Promote and ensure high standards of code quality through rigorous code reviews, automated testing (unit, integration), and adherence to secure coding practices. Contribute to the development and refinement of software engineering guidelines.
• Analyze complex project‑related problems, provide innovative solutions, and troubleshoot system issues across development, test, and production environments with limited oversight.
• Contribute to the continuous improvement of existing products and the modernization of legacy backend systems, focusing on performance, maintainability, and scalability.
• Support the creation of technical designs, architectural documentation, and other artifacts related to backend services, data flow, and integrations.
• Act as a member of a product team, supporting teammates and collaborating to ensure collective product and team success, fostering a culture of shared responsibility.

• Candidate must be available to work a hybrid schedule in Ashburn, VA.
• Must be a U.S. Citizen with the ability to pass CBP background investigation, criteria includes, but not limited to:
  • 3‑year check for felony convictions
  • 1‑year check for illegal drug use
  • 1‑year check for misconduct such as theft or fraud
• College degree (B.S.) in Computer Science, Software Engineering, Information Management Systems or a related discipline. Equivalent professional experience will be considered in lieu of degree.
• Professional
  
  Experience:
  
  at least seven (7) years related technical experience in backend software design, development, and implementation.
  • Expert‑level proficiency in C# programming language.
  • Extensive professional experience with the .NET Framework and .NET (Core) for building high‑performance backend applications and microservices.
  • Demonstrated experience with message brokers and event streaming platforms, specifically Kafka.
  • Proven experience interacting with and managing data in both relational databases (e.g., Postgre
    
    SQL, Oracle) and No
    
    SQL databases (e.g., Mongo
    
    DB).
  • Experience with designing and implementing robust Microservice Architectures and RESTful APIs.
  • Experience with source code control systems and concurrent development workflows (Git preferred).
  • Knowledge of creating reusable libraries and developing complex backend solutions.
  • Understanding of all elements of the software development life cycle (SDLC), including planning, requirements management, development, configuration management, quality assurance, and release management.
• Experience with Visual Studio, Docker.
• Strong ability to analyze complex project‑related problems and create innovative solutions.
• Exper…