Full Stack Senior Software Engineer, Onsite at RTX in Fullerton, CA

Full Stack Senior Software Engineer, Onsite Location: US-CA-FULLERTON-675 ~ 1801 Hughes Dr ~ BLDG 675 Date Posted: 2026-05-28 Country: United States of America Location: US-CA-FULLERTON-675 ~ 1801 Hughes Dr ~ BLDG 675 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: DoD Clearance: Secret Security Clearance Status: Active and existing security clearance required after day 1 At Raytheon, the foundation of everything we do is rooted in our values and a higher calling – to help our nation and allies defend freedoms and deter aggression. We bring the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today’s mission and stay ahead of tomorrow’s threat. Our team solves tough, meaningful problems that create a safer, more secure world. Our Software Department in Fullerton, CA is looking to hire a Full Stack Senior Software Engineer to work onsite in Fullerton, CA. Our Culture | RTX Careers What You Will Do: This position offers the opportunity to work across multiple technology domains including back-end data processing, front-end web interfaces, and DevSecOps automation, while contributing to next-generation situational awareness and decision support systems. Collaborate within an Agile team environment to design, implement, test, and deploy software components that enable real-time data collection, processing, and user interaction across complex distributed environments. Design, implement, and maintain software applications using Python, SQL, JavaScript, and CSS. Develop and integrate back-end data services and RESTful APIs to support real-time and historical data analytics. Contribute to data pipeline development, ML Ops, and Data Ops workflows that improve automation, traceability, and scalability of deployed solutions. Support development of intuitive front-end user interfaces for user operations and data visualization. Participate in code reviews, configuration management, and automated testing as part of a continuous integration/continuous delivery (CI/CD) environment. Collaborate with systems, test, and data engineers to ensure software components align with overall system objectives. Author and maintain technical documentation and contribute to design reviews. Qualifications You Must Have: Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) AND a minimum of 5 years of prior relevant experience Experience in Python for application development, data processing, or automation. Experience with JavaScript, HTML, and CSS for UI development. Experience working in Linux or cross-platform development environments. Able to obtain and maintain a U.S. government issued security clearance as and when required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance. Qualifications We Prefer: Foundational knowledge of SQL and relational database design principles. Experience with ML Ops or Data Ops frameworks (e.g., Airflow, MLflow, Kubeflow, or similar). Familiarity with web application architecture and tools (e.g., REST, GraphQL, PostgreSQL MongoDB, Redis). Exposure to real-time systems, distributed architectures, or mission-support software (e.g., visualization dashboards, situational awareness, telemetry). Internship or project experience involving data pipelines, AI/ML integration, or cross-domain systems. Previous RTX or defense-related project experience, or demonstrated interest/exposure to defense mission domains (e.g., aerospace, command-and-control, sensor systems, or intelligence applications). Understanding of cloud-based services (AWS, Azure, or GCP). Knowledge of containerization and deployment technologies (e.g., Docker, Kubernetes). Experience with test automation, CI/CD tools (e.g., Jenkins, GitLab CI), or Infrastructure as Code (IaC) tools. Well developed communication, documentation, and problem-solving skills. What We Offer: Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Trust, Respect, Accountability, Collaboration, and Innovation. Learn More & Apply Now! Please consider the following role type definition as you apply for 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. This position requires a security clearance. DCSA Consolidated Adjudication Services (DCSA , an agency of the Department of Defense, handles and adjudicates the security clearance process. More information about Security Clearances can be found on the US Department of State government website here: https://www.state.gov/m/ds/clearances/c10978.htm As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote. The salary range for this role is 95,500 USD - 181,700 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills. Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short-term disability, long-term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, Employee Scholar Program, parental leave, paid time off, and holidays. Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement. Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company’s performance. This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply. RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window. 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. Privacy Policy and Terms: Click on this link to read the Policy and Terms