Mountain Pass Solutions is a fast-growing software company that is committed to delivering outstanding solutions and service. We are committed to the growth of our employees and expect every member of the team to have an impact on our success. Your voice will be heard at Mountain Pass and you will see the impact you are making on the company. We are committed to an inclusive workplace that respects the differences of all members of the team. We are seeking a Senior Full-Stack Engineer / Player-Coach to lead the modernization of our platform, mentor other developers, and help set the technical foundation for future growth. This is a hands-on, high-impact role where you will work closely with the CEO and other developers to ship high-quality software while building scalable, AI-integrated engineering processes. If you enjoy leading by doing, modernizing systems incrementally, and using AI tools to work smarter, we want to hear from you.