Senior Full-Stack Software Engineer – Secure, Mission-Critical

Jobtome; Florissant (MO); On-site; USD 97,000 - 180,000; Full time

Benefits offered by this job

Health and disability insurance

401(k) match

Flexible spending accounts

Employee assistance program

Job summary

L3Harris Technologies is seeking a Senior Specialist, Full-Stack Software Engineer to lead the design and implementation of secure, scalable mission applications for MOSSAIC. The role focuses on back-end services, APIs, and rich web UIs using Java, Python, TypeScript, and JavaScript.

You will mentor engineers, drive secure-development practices, and coordinate with partner teams across the MOSSAIC program, with up to 15% travel. Colorado Springs location preferred.

Qualifications

• Bachelor's Degree or higher with 4+ years of relevant experience.
• Active Secret Clearance required.
• Experience with full-stack design and secure development practices.

Responsibilities

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

Skills

Java

Python

TypeScript

JavaScript

Security

Mentorship

Education

Bachelor's Degree

Active Secret Clearance

Tools

Kubernetes

Apache Kafka

RabbitMQ

Go

GTK/Qt

Job description

L3Harris Technologies is seeking a Senior Specialist, Full-Stack Software Engineer to lead the design and implementation of secure, scalable mission applications for MOSSAIC. The role focuses on back-end services, APIs, and rich web UIs using Java, Python, TypeScript, and JavaScript.

You will mentor engineers, drive secure-development practices, and coordinate with partner teams across the MOSSAIC program, with up to 15% travel. Colorado Springs location preferred.