Principal Application Software Engineer

K2 is building the largest and highest-power satellites ever flown, unlocking performance levels previously out of reach across every orbit. Backed by over $1 billion in total funding from leading investors including Altimeter Capital, ICONIQ, Kleiner Perkins, Lightspeed Venture Partners, Redpoint Ventures, and T. Rowe Price — and with over $1 billion in signed contracts across commercial and US government customers, we're mass-producing the highest-power satellite platforms ever built for missions from LEO to deep space. The rise of heavy-lift launch vehicles is shifting the industry from an era of mass constraint to one of mass abundance, and we believe this new era demands a fundamentally different class of spacecraft. Engineered to survive the harshest radiation environments and to fully capitalize on today's and tomorrow's massive rockets, K2 satellites deliver unmatched capability at constellation scale and across multiple orbits. With multiple launches in 2027 and plans to scale to 100 satellites a year, we're Building Bigger — helping develop the solar system and build toward a Kardashev Type II (K2) civilization. If you are a motivated individual who thrives in a fast-paced environment and you're excited about contributing to the success of a high-growth Series D-funded company, we'd love for you to apply. The Role As a Principal Application Software Engineer on ou [... source excerpt omitted ...] m, you will design and build mission-critical software that connects engineering, manufacturing, and operations. Your work will directly enable accelerated satellite design, rapid production, and reliable mission execution. You’ll collaborate closely with teams throughout K2 Space and deliver systems that improve efficiency, scale operations, and support ambitious missions. Responsibilities Develop highly reliable software solutions used across K2 Space — from factory floors to mission control. Create and evolve applications that improve how we design, build, and operate our spacecraft. Partner closely with engineers, business partners, and leaders across disciplines to underst [... source excerpt omitted ...] ges and design efficient solutions. Develop prototypes test concept and progress to full fledge software products. Own full-lifecycle product development from inception to happy customers. Lead architecture reviews, design discussions, and code reviews with your unique perspective. Lead software architecture design, deployment strategy, coding standards, and quality processes. Evaluate and make decisions regarding engineering options while balancing tradeoffs. Advocate, defend and convert other engineering leaders to your own solutions. Use data to drive prioritization of work and design of solutions to create the largest positive impact. Actively contribute to building a