Software Engineer (SE3)

Epsilon C5I (, a division of Epsilon Systems Solutions, is a 100 percent employee-owned company founded in 1998 with more than 20 locations serving the Department of Defense, Department of Energy, Department of Homeland Security, non-profit and commercial customers. The Dayton division has recently been named as one of only five prime awardees for the 10-year, $4.7 billion NOVASTAR contract supporting the National Air and Space Intelligence Center (NASIC), WPAFB, Ohio. The Dayton division has added over 70 full-time employees in just three years and are making plans now to exceed 100 full-time employees by this time next year. We are looking for talented individuals with a passion to serve their nation as we take on the challenges facing the country from threats around the world. Are you ready?

We're seeking a skilled Full Stack Developer or DevSecOps Engineer to join our dynamic team in building secure, scalable, and high-performance applications. The ideal candidate will bring a strong foundation in software development alongside a keen understanding of secure coding practices, automation, and deployment pipelines. Whether you're passionate about writing clean, maintainable code across the frontend and backend, or you're focused on integrating security into CI/CD workflows, infrastructure as code, and cloud-native environments, we value your ability to work collaboratively across development, operations, and security teams. You'll play a key role in driving innovation, ensuring software quality, and embedding security throughout the development lifecycle. Candidates must be able to work independently and as part of a technical team and have effective oral and written communication skills. Successful candidates will have strong problem solving and critical thinking skills. Desire an active TS/SCI clearance. Hybrid and remote work available.

Duties and Responsibilities:

• CI/CD tools (e.g., Jenkins, GitLab CI).
• Cloud security (AWS, Azure, Google Cloud Platform).
• Container security (Docker, Kubernetes).
• Threat modeling, secure coding practices.
• Scripting (Python, Bash).
• Frontend: React, Angular, Vue, etc.
• Backend: Node.js, Django, Spring Boot, etc.
• Databases: SQL (PostgreSQL, MySQL), NoSQL (MongoDB).
• RESTful APIs, GraphQL.
• Git, Docker
• Applying advanced knowledge software engineering, computer science and information technology experience and expertise toward the technical design, development, and implementation of complex programming tasks will require exceptional initiative and independent judgement.

• Writing skills are necessary to support the continual development of both technical reports and documentation for the other members of the Team and to develop the overall product documentation our client expects as part of the final deliverable.
• Identify, captures, understands, translates, and document customer requirements.
• Defines system and product requirements.
• Manages and documents system configurations, and oversees all transitions into production.
• Performs troubleshooting and remediation, ensures successful project implementation, and performs post project end user support.
• Deploy new secure systems and networks.
• Conduct post processing and data reduction.
• Must have a practical working knowledge of the Scrum framework, as well as experience working on a Scrum Team.
• Write analysis reports and develop briefings.
• Work independently and in a team environment.

Required Qualifications:

• Bachelor of Science degree in engineering, computer science, or information technology.
• 10 or more years of relevant industry experience.
• Applicants must have an active DoD Top Secret security clearance, with SCI access eligibility.
• Good interpersonal skills and the ability to communicate with all levels of business users and management.
• Must have the ability to work independently and in a self-directed fashion, as well as collaboratively on team projects in an environment of cooperation as dictated by the Scrum Guide and in accordance with Agile Methods.
• Effective written, oral, and presentation skills.

Desired Qualification:

• Prefer Master of Science in Engineering, computer science, or information technology.
• Certification in CompTIA Security+ (Plus)
• Familiarity with React, NodeJS, Django, Qt, CSS/HTML, Visual Studio, TypeScript/JavaScript, Golang, Go, Angular, Argo Workflow, Apache, and Ansible.
• Familiarity with Kubernetes, Docker, and Mesosphere.
• Experience with Elasticsearch, MongoDB, Oracle, PostgreSQL, and SQL Sever.
• Experience with RHEL and CENTOS.
• Real world experience working in a team that focuses on Design, Development, and the Implementation of web applications to power a national toolset with a large distributed user base.
• Familiarity with MATLAB, python, C, C++, C#, and Java.
• Familiarity with Git, GitHub, Gitlab, Jenkins
• Familiarity with Jira, Kafka, RabbitMQ, SQS
• Fundamental applied knowledge of the interconnectivity of operating systems and programming languages.
• Taking personal ownership in and the initiative to both research, learn and be mentored in new techniques, processes, or technologies when necessary to accomplish mission goals.
• Possessing exceptional writing skills to prepare any relevant technical documentation and generate both internal and client-facing technical reports along with any additional documentation pertinent to the position.
• Produce well-written designed, testable and efficient code that meet and exceed technical requirements.
• Ability to interface directly with users when necessary to troubleshoot code defects and deploy timely fixes.
• Actively contribute to a highly collaborative team environment, throughout all phases of the development lifecycle.
• Deploy applications on classified and secured networks.
• Deliver projects on time and with attention to quality.

ADA Notations:

• Regular communication (listening skills/speaking up in meetings).
• Noise conditions range from very quiet to very noisy.
• Prolonged use of computer (typing/keyboarding).
• Frequently required to sit for long periods of time, stand, and walk.
• Ability to travel by car, air or other means of transportation, if required.

Epsilon Systems Solutions, Inc. is an equal opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics.