Java Software Engineer for Modernization & AWS (Secret Pref)

Concept Solutions, LLC

Reston (VA)

Hybrid

USD 130,000 - 150,000

Full time

4 days ago

Be an early applicant

A complete application in a minute

Tailored resume and cover letter, ready to send.

Get past ATS filters

Benefits offered by this job

Health insurance

Dental insurance

Vision insurance

Life insurance

401(k) plan with matching and vesting

Job summary

Concept Solutions, LLC (CS) is seeking a Java Software Engineer to support a mission-critical modernization program for a Department of War customer. The role is hybrid in Reston, VA with on-site work at government facilities as required, and a potential October 2026 start date.

Base salary ranges from $130,000 to $150,000 depending on experience. The successful candidate will maintain and support existing Java applications, troubleshoot defects, and help transition to a modernized platform

Qualifications

3+ years of experience with Java, Spring Boot, and SQL.
Ability to understand, troubleshoot, and modify existing application code safely.

Responsibilities

Troubleshoot and resolve defects in Java Spring Boot applications.
Develop and implement patches in accordance with the customer’s established release schedule.
Maintain existing applications while supporting the transition to a modernized platform.
Ensure the stability of a legacy application through its planned retirement, without introducing enhancements.
Document legacy application capabilities to support the successor system.
Review, understand, and safely modify unfamiliar codebases.