Senior Principal Software Engineer

Location: US-UT-WEST VALLEY CITY-338 ~ 1127 & 1128 w 2400 S ~ BLDG 338, Ast-Salt Lake City Date Posted: 2026-03-05 Country: United States of America Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Security Clearance Type: TS/SCI with Polygraph Security Clearance Status: Active and existing security clearance required after day 1 Raytheon Company Managed by Collins Aerospace This role is primarily On-Site, with flexibility at hiring manager discretion . Applied Signal Technology (AST) is seeking a Senior Principal Software Engineer who strives for excellence and has a passion to be part of a team that strengthens our nation and improves the security of our world. AST provides trusted strategic and tactical SIGINT solutions that secure the interests of the U.S. and its partners. AST’s work in areas such as high-capacity broadband communications, signal processing and analysis, tactical SIGINT, and wireless communications continually challenges our extraordinary engineers to resolve problems and make the world a safer place. AST’s work environment is passionate and highly collaborative. It provides engineers the freedom to strengthen and expand their skills, explore new and creative ideas, and work closely with our nation’s finest service members all while embracing integrity, innovation, and work-life balance. This is an ONSITE position based out of our Salt Lake City, UT location. To learn more about Applied Signal Technology, please click the following link - Applied Signal Technology: WHO WE ARE What You Will Do Participate in the requirements, design, development and testing of software to include development of new work products or enhancement of existing applications and systems Design, code, test, integrate, and document software solutions Participate in internal review of software components and systems Collaborate with project managers and other professionals within Engineering Follow established development practices and processes to maintain the configuration management of software products Qualifications You Must Have Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 10 years of prior relevant experience. Experience developing in modern programming languages (e.g. C++) in a Linux environment Good working knowledge of data structures and how to efficiently use them to solve problems Experience with one or more scripting languages (e.g. Python) Experience working with containerized software and associated tools (Kubernetes, Helm, Podman) Ability to obtain a U.S. government issued Top Secret SCI (TS/SCI) security clearance. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Qualifications We Prefer Experience with Multithreading Experience working both in a team environment and individually Experience with network protocols such as TCP/IP Experience with Qt Experience with User Interface development Experience with Angular web GUI development Embedded SW Design Experience Experience in integrating software with hardware Experience with Configuration Management tools, such as git Experience maintaining and using build processes (makefiles, CMake) Familiarity with event-driven systems and messaging platforms such as Kafka Familiarity with RESTful APIs and gRPC Experience with or basic understanding of telecommunications systems concepts and/or signal processing Experience with or basic understanding of International Telecommunication Union (ITU) Standards Active and transferable U.S. government issued Top Secret SCI (TS/SCI) security clearance with Poly What We Offer Medical, dental, and vision insurance Three weeks of vacation for newly hired employees Generous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy option Tuition reimbursement program Student Loan Repayment Program Life insurance and disability coverage Optional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance,critical illness insurance, group legal, ID theft protection Birth, adoption, parental leave benefits Ovia Health, fertility, and family planning Adoption Assistance Autism Benefit Employee Assistance Plan, including up to 10 free counseling sessions Healthy You Incentives, wellness rewards program Doctor on Demand, virtual doctor visits Bright Horizons, child and elder care services Teladoc Medical Experts, second opinion program Eligible for relocation And More! Learn More & Apply Now! Do you want to be a part of something bigger? A team whose impact stretches across the world, and even beyond? At Collins Aerospace, our Mission Systems team helps civilian, military and government customers complete their most complex missions — whatever and wherever they may be. Our customers depend on us for intelligent and secure communications, missionized systems for specialized aircraft and spacecraft and collaborative space solutions. By joining our team, you’ll have your own critical part to play in ensuring our customer succeeds today while anticipating their needs for tomorrow. Are you up for the challenge? Join our mission today. Please ensure the role type (defined below) is appropriate for your needs before applying to this role. Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products. RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act. #J-18808-Ljbffr