Senior Full Stack Engineer

ABOUT SPHINX Sphinx builds software to solve complex national security problems in Space. Founded by engineers and technologists with deep experience across commercial and defense technology, we were frustrated by the outdated and insecure technology America's service members are forced to rely on. We're here to do better. We’re focused on building modern, scalable products with an emphasis on using open source technologies. Expect talented, motivated, and interesting colleagues who emphasize collaboration, transparency, and individual responsibility. ABOUT THE ROLE Sphinx is hiring a Senior Full Stack Engineer to join our team building the next generation of mission planning and command and control software for space communications programs. This team is tasked with creating modern, resilient services and capabilities to support the U.S. Government. As our engineering organization continues to scale rapidly, you’ll also play an important role in helping establish strong technical practices, supporting a growing team, and maintaining quality and consistency as we expand. As a Senior Full Stack Engineer , you will lead the development of intuitive, high-quality user interfaces and front-end experiences for Sphinx’s space vehicle mission planning platform, while also contributing across the full stack. We’re seeking an experienced engineer with strong front-end development expertise and a solid understanding of backend development, APIs, databases, and service integration. You’ll work as an individual contributor while also providing technical leadership and mentorship to more junior engineers. What you will be focusing on: Applying a strong understanding of modern front-end development to build intuitive, responsive, and maintainable user experiences using technologies such as JavaScript, TypeScript, React, Angular, and/or Vue Translating design mockups, user feedback, and system requirements into functional, visually appealing, and intuitive user interfaces Building performant, secure, and well-tested web applications with a focus on scalability, automation, usability, and security Leading the development of critical features across the full software development lifecycle, with significant influence from user feedback, system requirements, design engineering, and evolving customer needs Designing, developing, and improving APIs and backend services that effectively support front-end applications and system capabilities Developing and maintaining backend functionality using technologies such as Python, SQL, RESTful APIs, and containerized architectures Collaborating closely with QA and other engineering disciplines to define acceptance criteria, meet functional and technical requirements, identify defects, and ensure software quality Writing and maintaining automated unit, integration, and functional tests to validate functionality and ensure requirements are met Conducting thorough code reviews to maintain code…