Graph Database Engineer (TS/SCI with Poly Required)

Job Category: Software Engineering

Requisition Number: GRAPH001891

Posting Details

• 
  
  
  
  • 
    Posted:
    January 19, 2026
    
  
  
  
  


• 
  Full-Time
  


• 
  On-site
  


• 
  Salary Range:
  146,057.6
  to
  243,921.6
  


• 
  
  
  
  Locations
  
  
  
  Showing 1 location
  
  
  
  Chantilly
  
  Chantilly, VA, USA
  
  Chantilly
  
  Chantilly, VA, USA
  
  

Job Details

Description

GCI embodies excellence, integrity and professionalism. The employees supporting our customers deliver unique, high-value mission solutions while effectively leverage the technological expertise of our valued workforce to meet critical mission requirements in the areas of Data Analytics and Software Development, Engineering, Targeting and Analysis, Operations, Training, and Cyber Operations. We maximize opportunities for success by building and maintaining trusted and reliable partnerships with our customers and industry.


At GCI, we solve the hard problems. As a Systems (Graph) Software Engineer, a typical day will include the following duties:

JOB DESCRIPTION


We are looking for an experienced Systems Software Engineer to join our team, interested in designing, developing and maintaining essential software systems. The optimal candidate will have demonstrated experience integrating solutions with graph databases, such as JanusGraph. They will also have a strong background in systems software development, experience with 3rd party system integration, expertise in ElasticSearch, and a solid understanding of data modeling concepts. This is a fantastic opportunity to work on a challenging project that requires innovative solutions and collaborative problem-solving.


KEY RESPONSIBILITIES

• Design, develop, test, and deploy scalable and efficient software solutions


• Collaborate with cross-functional teams to identify and prioritize project requirements


• Participate with code reviews and ensure high-quality, modular, and reusable code


• Troubleshoot and debug issues in the application, including performance optimization and error handling


• Stay up-to-date with industry trends and emerging technologies, applying this knowledge to improve our application


• Design and implement data models that meet the needs of the application, ensuring data consistency and integrity

EDUCATION AND EXPERIENCE

• Bachelor’s Degree in Computer Science, Electrical or Computer Engineering or a related technical discipline, or the equivalent combination of education, technical training, or work/military experience.


• 5+ years of related software development experience.

REQUIRED QUALIFICATIONS

• Extensive expertise in Python and NodeJS


• 5+ years of experience in systems software development in NodeJS or Python


• Strong proficiency working with graph databases (for example JANUS Graph) and graph query languages


• Proven experience with 3rd party system integration using APIs, webhooks and other integration methods


• Strong understanding of software design patterns, principles and best practices


• Excellent problem-solving skills, with the ability to work effectively in a team environment


• Basic understanding of data modeling concepts, including entity-relationship, data normalization, and denormalization


• Experience with Git workflows, including feature branching, pull requests and code reviews


• Ability to work effectively in a Linux-based development environment

DESIRED QUALIFICATIONS

• Hands on experience with AWS Lambda, EventBridge and SQS


• Experience with Node.js, Express, MongoDB and Cassandra


• In-depth knowledge of ElasticSearch, including indexing, querying and aggregation


• Knowledge of containerization leveraging Kubernetes


• Familiarity with CI/CD pipelines and automation tools such as Jenkins or CircleCI


• Hands-on experience working with message brokers such as RabbitMQ or AWS SQS

*A candidate must be a US Citizen and requires an active/current TS/SCI with Polygraph clearance. 


Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

Qualifications

Skills







Behaviors

:


Motivations

:


Education

Preferred


Bachelor of Science or better in Computer Engineering or related field.

Experience

Required


5 years:

Related software development experience.


Licenses & Certifications

Equal Opportunity Employer
This employer is required to notify all applicants of their rights pursuant to federal employment laws.
For further information, please review the Know Your Rights notice from the Department of Labor.


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