Senior Full-Stack Engineer - Mission-Critical, Secret-Cleared

L3Harris Technologies; Colorado Springs (CO); On-site; USD 97,000 - 180,000; Full time

Benefits offered by this job

Health & Disability Insurance

401(k) Match

FSAs

Employee Assistance Program

Education Assistance

Parental Leave

Paid Time Off

Company Holidays

Job summary

L3Harris Technologies in Colorado Springs is seeking a senior specialist full-stack software engineer to design and implement secure, scalable mission software for MOSSAIC.

You will work across Java, Python, TypeScript and JavaScript, lead technical design, and mentor engineers while collaborating with cross-functional teams on sensor integration and C2 workflows.

This role requires an active Secret clearance and eligibility to travel up to 15%.

Qualifications

• Bachelor's Degree and minimum 4 years of prior relevant experience; graduate degree with 2+ years; or 8+ years without degree.
• Active Secret Security Clearance is required.

Responsibilities

• Lead technical design and implementation of full-stack capabilities including backend services and web UIs.
• Design scalable software using Java, Python, TypeScript, and JavaScript for SOA and microservices.
• Define secure integration patterns, service contracts, and data exchanges across distributed systems.
• Guide code reviews, testing, and secure-development practices.
• Mentor engineers and coordinate dependencies with partner teams.

Skills

Java

Python

TypeScript

JavaScript

Microservices

Education

Bachelor's Degree in related field

Graduate Degree

Tools

Kubernetes

Docker

Kafka

RabbitMQ

Qt

Job description

L3Harris Technologies in Colorado Springs is seeking a senior specialist full-stack software engineer to design and implement secure, scalable mission software for MOSSAIC.

You will work across Java, Python, TypeScript and JavaScript, lead technical design, and mentor engineers while collaborating with cross-functional teams on sensor integration and C2 workflows.

This role requires an active Secret clearance and eligibility to travel up to 15%.