Senior Principal Software Engineer

Overview

Applied Signal Technology (AST) is seeking a Software Engineer II to strengthen national security with advanced SIGINT solutions. The role is onsite in Salt Lake City, UT, and requires a TS/SCI security clearance with polygraph. Bring your expertise in C++ and Linux environments to design, test, and integrate mission‑critical software.

• Participate in the requirements, design, development, and testing of new and existing software products and systems.
• Design, code, test, integrate, and document software solutions.
• Participate in internal reviews of software components and systems.
• Collaborate with project managers and other engineering professionals.
• Follow established development practices and processes to maintain the configuration management of software products.

• Typically requires a STEM degree and a minimum of 10 years of relevant experience.
• Experience developing in modern programming languages (e.g., C++) in a Linux environment.
• Good working knowledge of data structures and efficient problem solving.
• 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 TS/SCI security clearance.
• U.S. citizenship is required for security clearance eligibility.

• Experience with multithreading.
• Experience working both in a team environment and individually.
• Experience with network protocols such as TCP/IP.
• Experience with Qt and user interface development.
• Experience with Angular web GUI development.
• Embedded software design experience.
• Experience 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 ITU standards.
• Active, transferable TS/SCI clearance with polygraph.

• Medical, dental, and vision insurance.
• Three weeks vacation for newly hired employees.
• Generous 401(k) plan with employer matching and Lifetime Income Strategy option.
• Tuition reimbursement program.
• Student loan repayment program.
• Life insurance and disability coverage.
• Optional coverages: pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal,  protection.
• Birth, adoption, parental leave benefits.
• Ovia Health, fertility, and family planning.
• Adoption assistance.
• Autism benefit.
• Employee assistance plan with up to 10 free counseling sessions.
• Healthy You incentives and wellness rewards program.
• Doctor on Demand and virtual doctor visits.
• Bright Horizons child and elder care services.
• Teladoc medical experts and second opinion program.
• Eligible for relocation.
• And more.

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. 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.