Senior Full-Stack Software Engineer – Mission-Critical Defense

Jobtome; Elizabeth (NJ); On-site; USD 97,000 - 180,000; Full time

Job summary

L3Harris is seeking a Senior Specialist, Software Engineering (Full Stack) in Colorado Springs to lead the design and implementation of secure, scalable mission applications and services. You will work on MOSSAIC Agile Portfolio Engineering programs using Java, Python, TypeScript, and JavaScript to support sensor integration and C2 workflows.

The role requires a Bachelor's degree with 4+ years of experience (or equivalent), an active Secret clearance, and willingness to travel up to 15%.

Qualifications

• Bachelor's Degree with 4+ years of relevant experience; graduate degree with 2+ years; or 8+ years of related experience in lieu of a degree.
• Active Secret Security Clearance is required.

Responsibilities

• Lead technical design and implementation of full-stack software capabilities (backend services, APIs, UI).
• Design scalable software using Java, Python, TypeScript, and JavaScript for SOA and microservices.
• Define secure integration patterns and data exchanges across distributed systems.
• Guide code reviews, testing, documentation, and secure development practices.
• Resolve complex software and integration issues across environments.
• Provide technical guidance and mentorship to engineers.

Skills

Security clearance

Full-stack design

Team mentorship

Education

Bachelor's Degree

Graduate Degree

Tools

Kubernetes

Java

Python

TypeScript/JavaScript

Job description

L3Harris is seeking a Senior Specialist, Software Engineering (Full Stack) in Colorado Springs to lead the design and implementation of secure, scalable mission applications and services. You will work on MOSSAIC Agile Portfolio Engineering programs using Java, Python, TypeScript, and JavaScript to support sensor integration and C2 workflows.

The role requires a Bachelor's degree with 4+ years of experience (or equivalent), an active Secret clearance, and willingness to travel up to 15%.