**Experienced Full Stack Customer Engineer – Web & Cloud Application Development**

Are you a passionate and skilled engineer looking to join a dynamic team that prioritizes customer success? Do you have a strong desire to solve real-world problems using technology and creativity? If so, we invite you to apply for the Full Stack Customer Engineer position at blithequark, a leading provider of payment processing services for e-commerce businesses. **About blithequark** blithequark is a cutting-edge company that has developed a revolutionary payment processing service for e-commerce businesses in Japan and around the world. Our platform provides a seamless payment experience for customers, with support for various payment methods, including credit cards, convenience store payments, mobile payments, bank transfers, carrier payments, and more. With our API-based integration, businesses can easily connect their e-commerce platforms, such as Steam, Shopify, and Wix, to our payment processing service. **About the Position** Our Customer Engineering team is a unique and exciting group that focuses on providing exceptional customer experiences through engineering activities. As a Full Stack Customer Engineer, you will be part of a team that collaborates with the Customer Success team to resolve customer-reported issues quickly and efficiently. Your responsibilities will include monitoring internal systems, providing technical support, analyzing logs, reproducing customer-reported issues, debugging, implementing solutions, and enhancing services. **Responsibilities** As a Full Stack Customer Engineer, your primary responsibilities will include: * Responding promptly to technical inquiries from the Customer Success team * Investigating the mechanisms and causes of customer-reported issues * Developing solutions or workarounds for technical challenges faced by customers * Collaborating with the Engineering team to resolve complex issues through team-based efforts * Contributing directly to the codebase to improve products and services * Sharing insights on product-related knowledge and commonly reported issues to support the Customer Success team * Representing customers and partners, and advocating for their voices to drive feature requests * Participating in incident processes and contributing to incident response efforts * Communicating directly with customers as needed **Requirements** To be successful in this role, you will need: * A strong passion for customer-facing work and a desire to solve real-world problems using technology and creativity * A deep understanding of programming languages and systematic debugging * Familiarity with HTTP, WWW, REST, SQL, logs, tracing, and observability * Proficiency in English and Japanese, with the ability to communicate effectively in both languages * A Japanese language proficiency level of N2 or higher * Experience with payment systems, payment-related applications, or other relevant areas **Nice to Haves** While not required, the following skills and experiences are highly desirable: * Experience with Ruby and Ruby on Rails * Familiarity with Datadog, Shopify, PHP, TypeScript, Amazon Web Services, Docker, or other relevant technologies * Experience with complex software debugging and code modification * Experience with experimental-based research or academic projects * CEFR B1 level or higher in English * Interest in foreign languages and cultures, with a willingness to continue learning **Benefits** As a Full Stack Customer Engineer at blithequark, you can expect: * A hybrid work style that combines remote work and office attendance * Flexible working hours, with a core time of 10:00-15:00 * The possibility of working from abroad for up to three months per year * Paid time off, including 10 days of paid leave, 5 days of summer vacation, 5 days of winter vacation, and a paid birthday holiday * A budget for self-study and skill development, with a maximum of ¥100,000 per year * Language learning programs, including English and Japanese courses * A Komoju Card Program, which provides a monthly allowance of ¥50,000 for lunch, coffee, and other expenses * Comprehensive social insurance and labor insurance * Commuting allowance * Opportunities for career growth and professional development If you are a motivated and skilled engineer who is passionate about customer success and technology, we encourage you to apply for this exciting opportunity at blithequark. Join our dynamic team and help us shape the future of payment processing services for e-commerce businesses. Apply for this job