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# Senior Software Engineer (C#/Java) - Remote

- **Company:** TEKSYSTEMS INC.
- **Location:** United States (Remote available)
- **Experience:** Expert
- **Contract:** Temporary contract
- **Skills:** Java (Programming Language), .NET Framework, Agile Methodology, Amazon Web Services, Automation of Tests, C Sharp (Programming Language), Static Program Analysis, Code Review, Relational Databases, DevOps, Scrum Methodology, Selenium, Software Requirements Analysis, SQL Databases, Software Testing Automation Framework, Web Application Frameworks, Cloud Platform System, ReactJS, Cypress (Programming Language), Backend, Containerization, Testcomplete, Information Technology, Deployment Automation, Front End Software Development, Docker
- **Published:** July 14, 2026
- **Apply:** https://www.clearancejobs.com/jobs/8953570/senior-software-engineer-cjava-remote

## About the Role

Active Secret Security Clearance
Bachelor's degree in Computer Science, Engineering, or related field
(or additional years of experience in lieu of degree)
Experience with C#/.NET and/or Java development
Experience with React.js or modern frontend frameworks
Hands-on experience with AWS cloud environments
Experience with containerization technologies (Docker preferred)
Strong understanding of SQL and relational databases
Experience working in Agile development environments
Understanding of CI/CD pipelines and DevOps practices, Full-stack development experience (frontend + backend)
Experience working with containerized applications
Familiarity with test automation frameworks
Prior experience supporting DoD or federal government programs

Experience Levels
We are hiring across multiple levels:

Software Engineer I:
3+ years experience (or 6+ without degree)

Software Engineer II:
6+ years experience (or 8+ without degree)

Software Engineer III (Senior):
8+ years experience (or 10+ without degree)

## Description

We are seeking Senior Software Engineers (C# or Java) to support the modernization and sustainment of a mission-critical command-and-control system supporting mobility operations across the Air Force.
This role is ideal for engineers who thrive in Agile environments, enjoy working across the full stack, and want to contribute to secure, scalable cloud-based systems supporting national security missions.

What You'll Do

Design, develop, test, and maintain scalable applications using C#/.NET or Java
Support modernization efforts, including migration to AWS GovCloud environments
Contribute to front-end (React) and/or backend services depending on experience
Participate in Agile development cycles, including sprint planning and code reviews
Write clean, efficient, and maintainable code
Implement and maintain CI/CD pipelines and automated deployment processes
Develop and execute automated test scripts using tools such as Selenium, Cypress, or TestComplete
Analyze system requirements and support task prioritization
Conduct code reviews and refactor existing codebases
Mentor junior developers and contribute to team growth
Ensure security and compliance through code analysis and automated scanning tools


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