Sr.SoftwareEngineer,Backend

Mercari is Your Marketplace. We make it super easy to sell (or buy) almost anything. We all have things we don’t use, never used or simply outgrew. But that stuff still has value. Mercari gives you the power to simply sell it, ship it, and earn some cash for it. Fashion to toys. Sporting goods to electronics. All the brands you know and love. Our mission is simple: to make selling easier than buying. And with 50M+ downloads in the U. S. and almost 500k new listings every day, we're just getting started. Our Engineers are developing complex software systems that scale to millions of users, all with production quality deployment, monitoring, and reliability. You will be designing, developing, testing, deploying, maintaining, and improving our mission-critical backend systems. You bring an insatiable desire to build safe and secure systems that have a direct impact on users. You love to solve complex performance problems and architectural challenges. And you take great pride in mentoring and collaborating in an open, respectful, flexible, and empathic manner. The Sr Software Engineer, Backend plays a key role in building and optimizing our marketplace platform's backend services. This role involves developing scalable, high-performance microservices, collaborating closely with product and frontend teams, and implementing best practices for modern backend development. This role requires deep expertise in Go, PHP, distributed systems, and microservices architecture. What you’ll be doing: Lead the development of complex backend features and services, such as payment processing and inventory management systems Design and implement scalable backend architectures and patterns, including microservices and event-driven systems Drive technical decisions and best practices for backend development, including coding standards, performance budgets, and testing strategies Mentor and guide other engineers in backend development practices through code reviews and technical presentatio