Specialist, Software Engineer

Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Senior Specialist, Software Engineering (Full Stack) 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. 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. Bachelor's Degree and minimum 6 years of prior relevant experience. Graduate Degree and a minimum of 4 years of prior related experience. Active Secret Security Clearance. 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. 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 application window for this position will close on 10/30/2026. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions. Please click here for the E-Verify Poster in English or Spanish . For information regarding your Right To Work, please click here for English or Spanish .