Software Engineer III - SIGINT - San Diego

Epsilon Systems Solutions, Inc; San Diego (CA); On-site; USD 115,000 - 165,000; Full time

Job summary

Epsilon Systems Solutions, Inc is seeking a Software Engineer III for the SIGINT program in San Diego, CA to design and develop secure, mission-critical software for high-assurance environments. The role emphasizes Java, RESTful APIs, and publish/subscribe messaging within IL6/IL7 capabilities.

The position requires a Bachelor’s degree and 4–8 years of software engineering experience, TS/SCI with CI poly, and US citizenship. Security+ is preferred and RMF familiarity is a plus.

Qualifications

• Bachelor's degree in Computer Science, Computer Engineering or related field.
• 4-8 years of software engineering experience.
• Proficiency in Java and API design/development.
• Experience with publish/subscribe architectures (ActiveMQ, Kafka, or similar).
• Hands-on experience for IL6 and IL7 environments.
• Security+ certification.
• Active TS/SCI clearance with CI polygraph.
• US citizenship per government requirements.

Responsibilities

• Design, develop, and maintain Java-based applications and RESTful APIs.
• Implement publish/subscribe messaging architectures using ActiveMQ or Kafka.
• Develop software for classified IL6/IL7 environments.
• Ensure cybersecurity requirements and secure coding practices (RMF).
• Collaborate with cross-functional teams to deliver high-quality secure software.
• Participate in code reviews, testing, and integration activities.

Skills

Java

API design

Publish/subscribe

Education

Bachelor's Degree

Tools

ActiveMQ

Kafka

Job description

Software Engineer III - SIGINT - San Diego

Job ID: 2026-423

Date Posted: 2026-11-02T00:00:00

Location: San Diego, California

Minimum Experience: 4 years

Education: Bachelor's Degree

Epsilon C5i (www.epsilonsystems.com/c5i), focused on software development and systems engineering for intelligence and combat systems, is seeking a Software Engineer III to join our team in designing and developing secure, mission-critical software solutions for high-assurance environments. The ideal candidate will have strong experience in Java, API development, and publish/subscribe architectures, along with a proven ability to deliver software in IL6 and IL7 environments.

Key Responsibilities:

• Design, develop, and maintain Java-based applications and RESTful APIs.

• Implement publish/subscribe messaging architectures using technologies such as ActiveMQ or Kafka.

• Develop software solutions for classified environments (IL6 and IL7).

• Ensure compliance with cybersecurity requirements, including familiarity with RMF and secure coding practices.

• Collaborate with cross-functional teams to deliver high-quality, secure software solutions.

• Participate in code reviews, testing, and integration activities.

Required Qualifications:

• Bachelor's Degree in Computer Science, Computer Engineering or Related Discipline
• Four to Eight (4-8) years of Software Engineering experience.
• Proficiency in Java and API design/development.
• Experience with publish/subscribe architectures (ActiveMQ, Kafka, or similar).
• Hands-on experience developing software for IL6 and IL7 environments.
• Security+ certification.
• Must have an active TS/SCI clearance with CI polygraph.
• Pursuant to the various government contractual requirements, all applicants must be a U.S. Citizen.

Preferred Qualifications:

• Familiarity with Risk Management Framework (RMF).
• Experience securing software to meet cybersecurity requirements.
• Strong understanding of secure coding practices and compliance standards.

Pay Range:

The pay range for this role is $115,000 To $165,000 Annually. This is a reasonable estimate for this role. Individual salaries are determined by a variety of factors including, but not limited to: business considerations, local market conditions, and internal equity, as well as candidate qualifications, such as skills, education, and experience.

ADA Notations:

• Regular communication (hearing/speaking)
• 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, walk, and may occasionally lift and move at least 25 pounds
• 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.

Equal employment opportunity, including veterans and individuals with disabilities.

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