548 matching jobs for “Principal Software Engineer”

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RTX

Principal Embedded Software Engineer - Radar, Onsite

El Segundo, California, United States

Design, develop, and test software based on software trouble reports in an agile, collaborative environment, delivering builds Demonstrate …

Added Oct 27, 2026

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RTX

Principal Software Engineer - Embedded Linux (Onsite)

US-IN-FT WAYNE-150A ~ 1010 Production Rd ~ BLDG 150A

… hardware boards. Contribute to the design, coding, testing, delivery and ongoing support for embedded Linux software systems. Participate in root cause analysis and resolution of complex hardware-software issues. Prepare …

Added Oct 27, 2026

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RTX

Principal Systems Engineer – Software Systems Engineer (Onsite)

Tucson, Arizona, United States

… and defense. The Systems Engineering and Test Capabilities (SETC) organization is currently hiring a Principal Systems Engineer to join our Tucson, AZ location. SETC is an exciting and challenging environment where you …

Added Oct 27, 2026

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Cisco Systems

Principal Software Engineer, AI Defense (Hybrid)

Milpitas, California, United States

Pay posted by employer$250,600–$362,600

… to define the industry standard for AI security at Cisco’s global enterprise scale. YOUR IMPACT As a Principal Software Engineer for AI Defense, you will serve as the chief technical authority driving the end-to-end security …

Added Oct 31, 2026

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RTX

Principal Software Engineer - Embedded Linux (Onsite)

Cedar Rapids, Iowa, United States

… to solve customers’ toughest challenges and to meet the demands of a rapidly evolving global market. As a Principal Software Engineer in this organization, you will be involved in the development of state-of-the-art communications, …

Added Oct 27, 2026

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RTX

Principal Software Engineer – 5G Core Networks

San Jose, California, United States

… Join us and help shape the future of aerospace and defense. Applied Signal Technology (AST) is seeking a Principal Software Engineer with specialization in protocol development within 5G Core Networks who strives for excellence and has a …

Added Oct 27, 2026

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RTX

Principal Software Engineer - DevOps / Infrastructure (Onsite)

Sterling, Virginia, United States

… to build and maintain positive relationships with program leaders and contributors. Experience with common software development and management tools such as GitLab, Jira, Confluence, Coverity, Nexus, Artifactory, and …

Added Oct 27, 2026

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RTX

Principal Software Engineer – Front-end Developer

San Jose, California, United States

… Join us and help shape the future of aerospace and defense. Applied Signal Technology (AST) is seeking a Principal Software Engineer with specialization in front-end development who strives for excellence and has passion to be part of a …

Added Oct 28, 2026

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RTX

Principal Software Engineer - Test Engineering (Onsite)

Cedar Rapids, Iowa, United States

… future of aerospace and defense. The Collins Test Solutions Engineering team within Mission Systems seeks a Software Engineer with the desire to learn, grow, and lead a talented team of engineers. The Software Engineer …

Added Oct 27, 2026

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Walmart

(USA) Principal, Software Engineer - Global Governance

Bentonville, Arkansas, United States +1 location

Pay posted by employer$110,000–$220,000 per year

… native. We learn from each other every day. We have a startup culture and are looking to grow our team with software engineers who take pride in their craft and are ready to grow in a fast-paced team-oriented environment. We …

Added Oct 27, 2026

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RTX

Principal Systems Engineer – Software Systems (Onsite)

Tucson, Arizona, United States

… more secure world. The Systems Engineering and Test Capabilities (SETC) organization is currently hiring a Principal Systems Engineer to join our Tucson, AZ location. SETC is an exciting and challenging environment where you …

Added Oct 27, 2026

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RTX

Principal Program Protection Engineer (Embedded Software Engineer)

Tewksbury, Massachusetts, United States

The Software Product Assurance Center’s Software Security Sensors and Effectors Department is seeking a highly skilled …

Added Oct 27, 2026

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Nvidia

Principal Software Engineer, DGX Cloud Production Engineering

Santa Clara, California, United States +1 location

… fields of our generation: GPU, Cloud, Cloud Development or Distributed Cloud. If you're a creative Principal Software Engineer who enjoys autonomy and shares our passion for technology, we want to hear from you. Your base salary will …

Added Oct 27, 2026

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Palo Alto Networks

Principal Software Engineer Data Platform ( Cortex)

Office - Israel - Tel Aviv

Join the Cortex team as a Principal Backend Engineer and own the backend strategy for our integrated detection and response engine. You will be …

Added Oct 27, 2026

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RTX

Principal Software Security Engineer - Product Owner

Cedar Rapids, Iowa, United States

Crypto Without the Coins—Come Engineer What Keeps Critical Systems Secure. Our Crypto team in the creates cutting edge embedded cryptographic …

Added Oct 28, 2026

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Northrop Grumman

Sr. Principal Software Signal Processing Engineer

United States-Colorado-Colorado Springs

Pay posted by employer$129,300–$193,900

… include, but not be limited to, the following: Designs, develops, documents, tests, and debugs applications software, and systems that contain logical and mathematical solutions. Conducts multidisciplinary research and …

Added Nov 3, 2026

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Palo Alto Networks

Principal Engineer Software- Backend Infra (Cortex)

Office - Israel - Tel Aviv

… changes that benefit teams and systems far beyond our immediate scope. Qualifications (must) 7+ years of software engineering experience E2E execution and driving processes through the organisation (i.e with external …

Added Oct 27, 2026

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Palo Alto Networks

Principal Engineer Software(Cortex XSOAR/XSIAM)

Office - Israel - Tel Aviv

Job Summary Palo Alto Networks is seeking a Principal Backend Engineer for our Cortex engineering group, focusing on Cortex XSOAR, Cortex XSIAM, and new Cortex …

Added Oct 27, 2026

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Fidelity National Information Services

Principal Software Engineer, Customer Messaging Platform

US FL JAX 347

… across FIS to send consistent, compliant and timely communications without building it themselves. As a principal engineer, you will set technical direction for customer messaging, make the build, buy or adopt calls, and …

Added Nov 3, 2026

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Palo Alto Networks

Principal Software Engineer - Frontend, Developer Experience

San Francisco, California, United States +8 locations

… Experience group is focused on improving the experience for our end users across our industrial-scale Software-as-a-Service observability platform. We are seeking experienced engineers who can craft intuitive, fast, …

Added Oct 27, 2026

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RTX

Principal Software Engineer – Front-end Developer

San Jose, California, United States

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About this opportunity

Original employer description

Date Posted:

2026-10-27



Country:

United States of America



Location:

US-CA-SAN JOSE-826 ~ 200 Holger Way ~ BLDG 826



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

At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world.

Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense.

Applied Signal Technology (AST) is seeking a Principal Software Engineer with specialization in front-end development who strives for excellence and has 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 challenge our extraordinary engineers to resolve problems and make the world a safer place. AST’s work environment is passionate, highly collaborative and provides engineers with 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 at the San Jose, CA location.

To learn more about AST, please click the link below.

Applied Signal Technology: WHO WE ARE

What You Will Do:

Apply your front-end development expertise to help create complex, innovative, and mission‑critical signals intelligence solutions. Key responsibilities include:
Contribute to the requirements definition, design, development, and testing of software, including new features and enhancements to existing applications and systems.
Collaborate closely with project managers, engineers, and cross‑functional teams to deliver high‑quality software capabilities.
Follow established development practices and processes to ensure proper configuration management and maintainability of software products.
Support the continual improvement of the software development environment, including DevOps practices, tools, and workflows within Engineering.
Travel: Up to 25% domestic to other AST sites and customer locations

Qualifications You Must Have:

Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 8 years of prior relevant experience.
Extensive experience developing in modern programming languages such as Python, Java, or C++ within a Linux environment.
Strong experience building complex web applications using the Angular framework and related technologies (TypeScript, JavaScript, DevExtreme, Cytoscape, Leaflet, etc.).
Working knowledge and proficiency in integrating with back‑end server‑side technologies, including application servers and databases such as Neo4j, PostgreSQL, and InfluxDB, as well as RESTful or similar web services.
Proficiency with common data formats such as JSON and XML.
Ability to obtain and maintain 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 microservices architecture, distributed systems, containerized deployments, and modern cloud technologies.
Experience with RESTful APIs, messaging technologies such as Kafka or RabbitMQ, and event‑driven architectures.
Experience with Agile/Scrum methodologies, DevOps practices, and test automation frameworks or tools.
Proficiency with one or more scripting languages (Python, JavaScript, Bash, Perl, etc.).
Experience using configuration management and defect‑tracking tools (e.g., Git, JIRA).
Experience maintaining and working with complex build processes (e.g., Makefiles, CMake).
Working knowledge of telecommunications systems concepts, computer network models, and protocol suites such as OSI, SS7, TCP/IP, and UMTS, including routing protocols (EIGRP, IS‑IS, OSPF, BGP).
Familiarity with telecommunications network infrastructure (routers, switches, etc.) and with network reconnaissance tools and techniques.
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. This position is classified as:

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.

#AST

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 118,300 USD - 224,900 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.

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