Full Stack Developer (C#)

SwiftCruit; Ashburn (VA); Hybrid; USD 103,800 - 218,100; Full time

Job summary

CACI seeks a skilled C# Software Engineer to support a CBP client in Northern Virginia. You will build high-performance backend microservices and APIs, utilize SQL and NoSQL data stores, and integrate with Kafka for streaming in a modern cloud environment.

The role requires 7+ years in backend software design, strong C#, .NET, Docker, and Git proficiency, plus agile collaboration and secure coding practices. Hybrid work in Ashburn, VA with US citizenship eligibility.

Qualifications

• Bachelor's degree in CS/SE/IMS or related field or equivalent experience.
• 7+ years backend software design, development, and implementation.
• Expert-level proficiency in C# and .NET Framework/Core.
• Experience with Kafka and event streaming.
• Relational (PostgreSQL/Oracle) and NoSQL (MongoDB) databases experience.
• Designing robust microservices and RESTful APIs.
• Knowledge of SDLC, security, and QA processes.
• Familiarity with Git workflows and CI/CD.
• Experience with Visual Studio and Docker.

Responsibilities

• Design, develop, and implement backend microservices and APIs using C# and the .NET ecosystem.
• Implement data solutions with PostgreSQL/Oracle and MongoDB, and integrate Kafka for streaming.
• Develop cloud-native applications emphasizing performance, scalability, and resilience.
• Participate in Agile Scrum ceremonies and collaborate with product owners and teammates.
• Promote high code quality through reviews, testing (unit/integration) and secure coding.
• Analyze complex problems and troubleshoot across dev/test/prod with minimal oversight.
• Modernize legacy backend systems focusing on maintainability and performance.
• Create technical designs and architectural documents for backend services.
• Contribute to a product team with shared responsibility and cross-functional collaboration.

Skills

C# programming language

NET Framework/Core

Kafka

PostgreSQL/Oracle

MongoDB

Microservices

RESTful APIs

Git

Docker

Unit testing

Cloud platforms

Education

B.S. in Computer Science / Software Engineering / Information Management Systems

Tools

Visual Studio

GitLab CI/CD

Terraform

Kubernetes

Job description

Job Title: Full Stack Developer (C#)Job Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: NoneEmployee Type: RegularPercentage of Travel Required: Up to 10%Type of Travel: Local* * *

The Opportunity:

CACI is seeking a C# Software Engineer to join our BEAGLE (Border Enforcement Applications for Government Leading-Edge Information Technology) Agile Solution Factory (ASF) Team supporting Customs and Border Protection (CBP) client 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.

Responsibilities:

In this hands-on role, you will be instrumental in developing high-performance, cloud-native applications for critical CBP operations. Leveraging your expertise inC# and the .NET ecosystemto build robust back-end microservices and APIs, andinteracting with databases such as MongoDB, you will contribute to the entire software development lifecycle. Your work will involve building resilient systems, integrating with technologies likeKafka for data streaming, and ensuring seamless deployment within a modern cloud environment.

What you’ll get to do:

• 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., PostgreSQL, Oracle) and NoSQL databases (e.g., MongoDB), 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.

Qualifications:

Required:

• 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 experiencein 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., PostgreSQL, Oracle) and NoSQL databases (e.g., MongoDB).
  • Experience with designing and implementing robustMicroservice 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.
• Experience with C# unit testing frameworks (e.g., NUnit, xUnit, MSTest).

• Local candidates must be available to work a hybrid schedule in Ashburn, VA.

Desired:

• Familiarity with cloud platforms (e.g., AWS, Google Cloud) and experience deploying/managing .NET applications within these environments.
• Experience with advanced monitoring and observability tools such as Dynatrace, AppDynamics, SCOM, Prometheus, or Grafana.
• Demonstrated experience with Infrastructure as Code (IaC) principles and tools (e.g., Terraform, CloudFormation) for automating infrastructure provisioning.
• Experience with container orchestration platforms (e.g., Kubernetes) for deploying and managing microservices.
• Knowledge of CI/CD pipelines and tools (e.g., Jenkins, Harness, GitLab) for automated build and deployment processes.
• Understanding of distributed tracing and logging best practices.
• Ability to apply estimation techniques to software development efforts.
• Strong collaboration skills and a desire to work within a team.
• Highly responsible, team-oriented individual with a very strong work ethic and a self-starter.

What You Can Expect:

A culture of integrity.

At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.

An environment of trust.

CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.

A focus on continuous growth.

Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy.

Pay Range

There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.

The proposed salary range for this position is:

$103,800 - $218,100

CACI is anEqualOpportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any otherprotectedcharacteristic.