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Remote New

Senior Full Stack Developer

Karsun Solutions, LLC
United States
Jul 29, 2025

Why Karsun?

Join Karsun Solutions to grow your career with the company transforming possible for the US Government.

At Karsun, collaboration drives our community. We're committed to building an environment where team members from diverse backgrounds can innovate, learn and grow with us. Here at Karsun, the only limit to your potential is the limit of your curiosity.

Join Team Karsun, and Find Your Next!

Summary

As a key member of the team, the Sr FSD will be responsible for the entire software development lifecycle of assigned software components, from requirements gathering and development to testing and deployment, all within a SAFe Agile framework. The Sr FSD will play a critical role in building and maintaining applications that support our core mission, with a focus on seamless integration and high performance.

What You'll Do:

  • Application Development: Develop, test, and deploy full-stack applications, including dashboards, process automation tools, and interface applications, using Java J2EE, Spring/Spring Boot, and other relevant technologies.
  • Microservices Architecture: Design, develop, and maintain API microservices that are scalable, resilient, and secure.
  • Data Integration: Develop and test interface applications for secure data transfer with other government entities (as approved), ensuring reliable machine-to-machine communication and data integrity.
  • Infrastructure Integration: Deploy and integrate applications within our infrastructure, ensuring seamless orchestration with other internal and external systems.
  • Incident Management: Propose, test, implement, operate, maintain, and improve ticketing and incident tracking systems to ensure efficient issue resolution.
  • Documentation: Create, update, and maintain comprehensive documentation for all systems, including design specifications, user manuals, and troubleshooting guides.
  • Collaboration: Collaborate effectively with other developers, testers, and stakeholders within a SAFe Agile environment.
  • Continuous Improvement: Identify and implement opportunities to improve system performance, reliability, and security.

Required Qualifications:

  • Bachelor's degree in Computer Science or a related field.
  • 8-10 years of experience in full-stack development.
  • Strong proficiency in Java, JEE and related technologies, including Spring/Spring Boot and Angular frameworks.
  • Experience with API microservices development.
  • Hands-on experience with Docker, Apache Maven, and JBoss.
  • Experience with enterprise application platforms and cloud-native application hosting.
  • Solid understanding of responsive design principles and implementation.
  • Strong Proficiency in JavaScript frameworks such as Angular, Bootstrap, jQuery, and DataTables.
  • Experience with Hibernate ORM.
  • Experience with Atlassian Application Lifecycle Management tools (JIRA/Confluence).
  • Experience with both frontend and backend development technologies.
  • Availability during core business hours of 9:00 AM - 5:00 PM EST.
  • Ability to obtain and maintain a Public Trust clearance.

Preferred Qualifications:

  • Experience supporting US federal government contracts
  • Experience with developer AI tools such as Microsoft Co-Pilot is a plus
  • Experience with work flow orchestration tools such as Temporal.io, Camunda is a plus.
  • Experience with integrating USWDS compliant components with Angular storybook is a plus

Things to Know:

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to disability, status as a protected veteran or any other status protected by applicable federal, state, local, or international law.

Salary Range

The proposed salary range for this role is $135,000.00 to $150,000.00 USD. The salary range provided is a good faith estimate representative of all experience levels. Karsun considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate's work experience, location, education/training, and key skills.

Third Party Resumes: Karsun does not accept unsolicited resumes through or from search firms or staffing agencies. All unsolicited resumes will be considered the property of Karsun and Karsun will not be obligated to pay a placement fee.

Clearance Information

This position requires the eligibility to obtain a security clearance. The Defense Industrial Security Clearance Office (DISCO), an agency of the Department of Defense, handles and adjudicates the security clearance process. More information about Security Clearances can be found on the US Department of State government website: https://www.state.gov/m/ds/clearances/c10978.htm

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