4253 Senior Java Developer jobs in Mount Vernon,VA

Backend Developer, Data Platform

Vantor

Reston, VA 20190

To be eligible for this position, you must be a U.S. Citizen.
This position requires an active U.S. Government Security Clearance at the TS/SCI level with CI Polygraph.
_Export Control/ITAR:_ Certain roles may be subject to U.S. export control laws, requiring U.S. person status as defined by 8 U.S.C. 1324b(a)(3).
Current/active TS/SCI with a current CI polygraph or be willing and able to obtain a CI polygraph.
5+ years of professional software engineering experience, with strong backend development skills
Strong proficiency in Python
Experience building backend systems, APIs, or distributed services in production environments
PostgreSQL and Elasticsearch proficiency
Familiarity with AWS, especially S3, RDS, and other data centric services
Bachelor's degree in a related field, e.g. Computer Science, Systems Engineering or equivalent experience
Understanding of software engineering fundamentals including testing, version control, CI/CD, and system design

JLL

Washington, DC 20005

7-15 years of experience in project management, preferably in Corporate Interiors (REQUIRED)
Experience in managing multiple diverse types of Corporate Interiors projects, varying from $50K to $50M+ in size (REQUIRED)
Ability to manage 8-12 projects at a time

ManTech

Chantilly, VA 20151

GovCIO LLC

Fairfax, VA 22031

Bachelor's degree in Computer Science, Engineering, or related field (or equivalent experience).
Active secret clearance
US Citizen
12+ years of IT experience with large integrated projects
5+ years of professional experience in Java development, preferably in federal or defense contracting environments.
Strong knowledge of Java SE/EE, Spring Boot, and RESTful services.
Familiarity with cross-domain solution architectures, data labeling, and secure data transfer protocols.
Experience working in secure environments, preferably within the DOJ, and understanding of FISMA, NIST, or RMF compliance.
Proficiency with build tools (Maven/Gradle), version control (Git), and CI/CD tools (Jenkins, GitLab CI).
Exposure to containerization technologies (Docker, Kubernetes) and cloud platforms (AWS GovCloud, Azure Government).
Understanding of secure coding practices and experience with static/dynamic code analysis tools.
Strong problem-solving skills and ability to work independently or within a cross-functional Agile team.

Lockheed Martin

Alexandria, VA 22315

City Year

Alexandria, VA 22308

Be a U.S. citizen or legal permanent resident
Authorization to work in the U.S. is not sufficient.
Those with DACA status unfortunately are not eligible at this time
Be 17-25 by July 1, 2025
Have a GED or high school diploma
Some college experience
College degree
Have served no more than three terms in an AmeriCorps state or national program*
Agree to and complete a background check
Be able to begin City Year by July/August 2025 (specific start date varies by location)