Top Companies Hiring for Principal Software Engineer Jobs

In the four decades since our founding, Dell Technologies has transformed from a scrappy PC startup to the world’s most essential technology infrastructure company for the data era. Our customers continue to be our greatest inspiration as we work together to create and harness technology for a better world. We’re proud of our journey since 1984, but we’re just getting started.

At Microsoft, our mission is to empower every person and every organization on the planet to achieve more. When you join Microsoft, you're not just taking on a job, you're embracing a calling. A calling where your individual contributions amplify into a collective force championing global progress and innovation. Rooted in a growth mindset, Microsoft believes in nurturing potential, embracing change, and lifelong learning. As part of Team Microsoft, you'll collaborate across boundaries, building upon the ideas of others, unified by our shared mission. Together, our aspirations become tangible. Consider Microsoft to make world-changing impact. Because impact matters. Join us at careers.microsoft.com

Northrop Grumman is a leading global aerospace and defense technology company. Our pioneering solutions equip out customers with the capabilities they need to connect and protect the world and push the boundaries of human exploration across the universe. Driven by a shared purpose to solve our customers’ toughest problems, our nearly 100,000 employees define possible every day. © 2026 Northrop Grumman is an Equal Opportunity Employer, making decisions without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class. For our complete EEO and pay transparency statement, please visit http://www.northropgrumman.com/EEO. U.S. Citizenship is required for all positions with a government clearance and certain other restricted positions.

Oracle is the cloud leader for global business. Our technologies are transforming the world and no matter how complex, they have one thing in common: making our shared future better. Realize your potential as part of a company that’s innovating solutions to global challenges that affect billions of lives. Visit oracle.com/careers.

Privately held since 1946, Fidelity Investment’s mission has always focused on building better financial futures for our customers—and our associates. Whether we’re helping individuals to grow their wealth, assisting companies and non-profits to deliver benefits to their employees or providing institutions and independent advisors with cutting edge technology solutions, we’re committed to helping people achieve the unique futures they envision.

Yahoo is a global media and tech company that connects people to their passions. We reach nearly 900M people around the world, bringing them closer to what they love—from finance and sports, to shopping, gaming and news—with the trusted products, content and tech that fuel their day. For partners, we provide a full-stack platform for businesses to amplify growth and drive more meaningful connections across advertising, search and media.

All Amazon teams and businesses, from Prime delivery to AWS, are guided by four key tenets: customer obsession rather than competitor focus, passion for invention, commitment to operational excellence, and long-term thinking. We are driven by the excitement of building technologies, inventing products, and providing services that transform the way our customers live their lives and run their businesses.

With more than 185,000 global employees, RTX pushes the limits of technology and science to redefine how we connect and protect our world. Through industry-leading businesses – Collins Aerospace, Pratt & Whitney and Raytheon – we are advancing aviation, engineering integrated defense systems and developing next-generation technology solutions and manufacturing to help global customers address their most critical challenges. Collins Aerospace Specializes in advanced structures, avionics, connectivity solutions, interiors, mission systems, and power and control systems that serve customers across the commercial, regional, business aviation and defense sectors. Pratt & Whitney Designs, manufactures and services the world's most advanced aircraft engines and auxiliary power systems for commercial, military and business aircraft. Raytheon Creates next-generation defense solutions that are smarter, faster and better than previously thought possible. Specializes in integrated air and missile defense, advanced sensors, space-based systems, hypersonics and effectors.

Welcome to Comcast. From the connectivity and platforms we provide to the content and experiences we create, we bring people together, globally. Our people think the world of our work, and that’s why our work is the best in the world.

SAIC® is a premier mission integrator focused on advancing the power of technology and innovation to serve and protect our world. Our robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. We integrate emerging technology, rapidly and securely, into mission critical operations that modernize and enable critical national imperatives. We are approximately 23,000 strong; driven by mission, united by purpose, and inspired by opportunities. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.3 billion. For more information, visit saic.com. For ongoing news, please visit our newsroom.