Senior Full Stack Developer

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

Karsun Solutions is seeking an experienced Senior Full Stack Developer to support and enhance existing applications while designing, building, and deploying new enterprise solutions. This role will serve as a technical lead responsible for maintaining legacy Java Server Pages (JSP), Python components, and PL/SQL scripts, as well as performing handson troubleshooting of application issues, ETL workflows, and data quality challenges. The ideal candidate will also drive modernization initiatives, guiding the transformation of legacy systems into contemporary, wellarchitected solutions and exploring the integration of artificial intelligence (AI) and machine learning capabilities to advance federal program objectives.

What You'll Be Doing:

• Maintain and enhance legacy applications built with opensource, COTS, and frontend components using frameworks such as Tomcat, JSP, Node.js, jQuery, and Python, ensuring security, performance, and compatibility.
• Troubleshoot and resolve data platform integration issues involving backend APIs and database connections to improve system reliability and efficiency.
• Manage multiple ETL and dataprocessing workflows, ensuring accurate data transformation and preparation.
• Analyze business requirements, design system architectures, and provide technical leadership for new technology initiatives.
• Collaborate with business users to understand requirements and deliver functional enhancements.
• Develop proofs of concept, prototypes, and demonstration environments to support solution development, including evaluating AI and machinelearning capabilities.
• Design, build, and maintain APIs, data management processes, and workflow architectures to modernize legacy applications.
• Assess emerging AI tools, frameworks, and platforms to identify practical adoption opportunities aligned with mission and program needs.
• Perform code reviews, write unit tests, and maintain applications using modern DevOps practices, including version control and CI/CD pipelines. Apply best practices in coding, testing, security, and software architecture to deliver modular and maintainable solutions.
• Collaborate with crossfunctional teams, maintain technical documentation, support version control and release management, and contribute to reusable component design to improve efficiency and innovation.

Required Qualifications:

• Bachelor's degree in Computer Science, Information Technology / or Engineering (any field), Data Science, or related technical field.
• 10+ years of software development experience, including at least 1 year of hands-on experience, education or training in developing AI or machine learning solutions.
• Ability to troubleshoot complex technical issues with integrated systems across applications and data tiers.
• Experience building the architecture and design (architecture, design patterns, reliability, and scaling) of new and current systems.
• Experience in implementing security protocols across services and products and deploying applications in cloud environments.
• Experience with DevOps practices including Git-based version control and CI/CD pipelines.
• Strong ability to communicate complex technical concepts to both technical and non-technical stakeholders.

Preferred Qualifications:

• Master's degree in Computer Science, Artificial Intelligence, or related field and 2+ years' experience as a Full Stack Developer or Software Developer.
• Experience must include analyzing, maintaining or developing and enhancing applications and front-end components.
• Experience integrating AI solutions with enterprise data platforms such as ETL and Reporting or collaboration platforms.

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 $140,000 to $158,000 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

Location

To be considered for this role, you must reside in one of the following states: CA, CO, DC, FL, GA, IL, MD, NJ, NY, NC, OH, OK, PA, SC, TX, VA, WV.

Applicants must be authorized to work in the U.S. We may consider candidates currently in H-1B status who are eligible for transfer.