This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Software Engineer, Billing based in the United States. Join a remote-first engineering team responsible for billing infrastructure used by millions of developers and organizations.You’ll design, evolve, and operate systems that directly support revenue, customer trust, and financial accuracy.The role spans backend services, APIs, frontend experiences, cloud infrastructure, and high-scale transactional systems.You’ll make architectural decisions where reliability, scalability, security, and developer velocity are equally important.You’ll also mentor engineers, influence technical direction, and collaborate across product, engineering, and business teams.The environment values strong technical judgment, curiosity, ownership, and continuous improvement.This is an opportunity to build deep expertise in a critical engineering domain while solving complex problems at global scale.