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Full Stack Developer


We are seeking an experienced

Full Stack Developer.

As a  Full Stack Software Engineer you will be responsible for providing application development and support to an eco-system of big data apps, in a collaborative environment.
This role resides in our Growth departmentand reports to our Program Manager. This position is on a customer site in the Annapolis Junction, MD, Washington, DC or Reston, VA location, (to be determined with candidate preference and pending customer approval) with a 10% travel requirement.SIXGEN supports cyber and intelligence missions by serving government and commercial organizations as they overcome global cybersecurity challenges. Our highly skilled operators conduct research and assessments based on real-world threats.

We simulate adversaries and malicious actors to report details and actionable findings on critical assets and infrastructures. Our program planners advise mission owners to bring rapid solutions to intelligence mission leaders. Using innovative processes, tools, and techniques, we predict and overcome cybersecurity vulnerabilities. Our successes are supported by our diverse team of experienced, technical talent. SIXGEN, Inc. is an Equal Opportunity/Veterans/Disabled Employer.Core Responsibilities:

  •  Interacts with customers, PMs, and other development teams to gather, analyze, and define requirements to determine the most effective software and web technologies to satisfy the client's needsDevelops, maintains, supports, and enhances complex and diverse software systems (e.g., processing-intensive analytics, novel algorithm development, manipulation of extremely large data sets, real-time systems, and business management information systems) based upon documented requirements
  • Provides specific input to the software components of system design to include hardware/software trade-offs, software reuse, and requirements analysis from system level to individual software components
  • Utilizes software engineering and design methodologies appropriate to the development, integration, and enterprise-level production environment
  • Designs, creates, tests, and maintains software and web-based applications and content solutions to satisfy customer requirements
  • Follows a formal design process using formal specifications, data flow diagrams, and adheres to laws, standards, and established guidelines for development and delivery of software and web applications
  • Develops and maintains software and web development technical documentation to assist with software and web application maintenance and upgrades
  • Provides software process management and configuration management throughout the software / web development life cycle.
  • Analyzes and troubleshoots extremely complex software problems and provides solutions using the latest technologies.

Required Skills and Experience:


  • 5 + years of Full Stack Development
  • NoSQL/SQL (Mongo, PostgreSQL) familiarity
  • REST APIs, utilizing secure transport methodology
  • CI/CD tool experience (Gitlab, Jenkins)
  • Microservices Architecture
  • Containerization using Docker and Kubernetes
  • Java, Spring, Springboot, MongoDB

Desired Skills and Experience:


  • Utilizing Cloud Platform technologies, preferably AWS
  • Big Data Tools (Elasticsearch, Splunk, NiFi, Kafka)
  • Agile/ Scrum experience
  • Experience building and deploying Docker-based applications
  • Experience with large language models (LLM) and AI/ML concepts

Additional Details


  • Job Location: Annapolis Junction, MD, Washington, DC or Reston, VA
  • Clearance Requirement: Active TS with a CI polygraph
  • Travel: Estimated 10% or less.

Compensation & Benefits


  • Competitive salary
  • Employer-paid health insurance premiums (medical, dental, vision)
  • Employer-paid short/long term disability insurance and basic life/AD&D insurance
  • 401K with a 4% employer contribution
  • Professional development reimbursement options available (training, certification, education, etc)​
  • Flexible and remote work policies for most positions
  • Paid Time Off (PTO) at a rate of three (3) weeks plus one (1) day per year of service up to four (4) weeks annually
  • 11 paid holidays per calendar year​

At SIXGEN, we are committed to fair and equitable compensation practices. The anticipated salary range for this role is $140,000-$190,000 per year, depending on experience and qualifications. This range reflects our compensation philosophy, which takes into account various factors including the candidate's relevant experience, education, skills, LCATs rates and position level, and market competitiveness. In addition to base salary, employees may be eligible for other forms of compensation to include our growth incentive program, incentives and benefits.

The final salary offer will be determined after a thorough review of the candidate's background and alignment with the role. Please note that this range is subject to change and should be considered as a guideline rather than a definitive figure.We are committed to fostering an inclusive culture that values diversity in our people, reflecting the communities we serve and our customer base. We strive to attract and retain a diverse talent pool and create an environment where everyone is empowered to be their authentic selves at work.SIXGEN is an Equal Opportunity Employer.

We ensure that all applicants are considered for employment without regard to race, color, religion, sexual orientation, gender identity, national origin, disability, age, marital status, ancestry, projected veteran status, or any other protected group or class.

Life at SixGen, Inc.

At SIXGEN, we've cracked the code on meaningful and innovative ways to support the cyber mission. Our workforce provides incident response, operational and penetration testing, red teaming, tool development, cyber training development and continuous monitoring. Our on-site and remote assessments are used to identify vulnerabilities within the most critical networks. We lead cybersecurity innovation in product development by designing and evolving highly specialized hardware and software focused on Endpoint Detection and Response, Red Team, Data Science, and Threat Intelligence missions. We take pride in our work and the resulting enhanced cybersecurity posture for our customers around the globe.
Thrive Here & What We Value* Inclusive culture valuing diversity* Empowerment for authentic expression at work* Flexible and remote work policies* Professional development reimbursement* Competitive salary with comprehensive benefits package* Recognition of military expertise* Emphasis on self-development opportunities* Industry partnerships

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