Senior Specialist, Software Engineering (Full Stack)

Job Title: Senior Specialist, Software Engineering (Full Stack)

Job Code: 44012

Job Location: Colorado Springs, Colorado

Job Schedule: 9/80 - Employees work 9 out of every 14 days - totaling 80 hours worked (Every Other Friday Off)

Job Description:

The Maintenance of Space Situational Awareness Integrated Capabilities (MOSSAIC) Agile Portfolio Engineering (APE) program serves the space domain awareness (SDA) customer through optical and radar sensors and associated command and control (C2) capabilities. The program is seeking a senior specialist full-stack software engineer to join its Special Projects team. You will lead technical design and implementation of secure, scalable mission applications and services using Java, Python, TypeScript, and JavaScript to support sensor integration, command-and-control workflows, and user-facing mission capabilities.

Essential Functions:

• Lead technical design and implementation of full-stack software capabilities, including backend services, application programming interfaces, and web user interfaces.
• Design scalable software using Java, Python, TypeScript, and JavaScript for service-oriented architecture and microservices-based systems.
• Define secure integration patterns, service contracts, and data exchanges across distributed systems.
• Guide code reviews, software testing, technical documentation, and secure-development practices.
• Resolve complex software and integration issues across development, test, and deployment environments.
• Provide technical guidance and mentorship to software engineers while supporting sound engineering decisions.
• Coordinate technical dependencies with partner teams and contribute to delivery planning and execution.
• Travel up to 15% as needed to support program and customer requirements.

Qualifications:

• Bachelor's Degree and minimum 6 years of prior relevant experience. Graduate Degree and a minimum of 4 years of prior related experience. In lieu of a degree, minimum of 10 years of prior related experience.
• Active Secret Security Clearance.

Preferred Additional Skills:

• Experience developing software using C/C++, Rust or Go.
• Experience developing production software using Java, Python, TypeScript, and JavaScript.
• Experience designing and integrating service-oriented architectures, asynchronous messaging patterns, and microservices-based applications.
• Experience designing application programming interfaces, service contracts, and integrations for distributed systems.
• Experience leading technical design, code reviews, automated testing, and software-delivery activities.
• Experience improving continuous integration and continuous delivery workflows for software teams
• Experience building native graphical user interfaces using GTK or Qt.
• Experience applying user interface and user experience design principles to production software.
• Experience defining technical approaches for complex full-stack applications.
• Experience deploying or supporting containerized applications in Kubernetes environments.
• Experience with event-streaming or message-bus technologies, such as Apache Kafka, RabbitMQ, ZeroMQ, or NATS.

In compliance with pay transparency requirements, the salary range for this role in Colorado state is $97,000-$180,000. This is not a guarantee of compensation or salary, as final offer amount may vary based on factors including but not limited to experience and geographic location. L3Harris also offers a variety of benefits, including health and disability insurance, 401(k) match, flexible spending accounts, EAP, education assistance, parental leave, paid time off, and company-paid holidays. The specific programs and options available to an employee may vary depending on date of hire, schedule type, and the applicability of collective bargaining agreements.

The application window for this position will close on 10/30/2026.