Job Description: [Department Overview]As Japan's largest internet shopping mall service is used by over tens of millions of consumers, we strive to improve through a cycle of hypothesis → verification → analysis → systemization.In addition, in order to provide continuous and stable services under high load conditions during sales and other large events, we take into account various system and service characteristics and optimize the web backend, providing an opportunity to constantly test your engineering skills.[Position Outline]The E-Commerce Marketplace Development Department is looking for a senior backend development engineer for the website. Specifically, you will be responsible for the design, development, and operation of the web system backend, as well as the engineering team and project management, including the following:[Responsibilities]* Understand the priorities of business requirements and deliver high-quality services within a tight schedule.* Lead projects and resolve technical issues for assigned services, or design, develop, test, and release new or existing features. * Design, develop, test, and release projects.* Operational support (responding to inquiries from consumers and merchants, research, operational tasks, etc.) Required Skills:* 5+ years of tech lead experience (architecture design of high-load web systems, technical decision-making, etc.)* Experience leading the design of the entire system with consideration for scalability and maintainability, and strategically leading the future vision of the service (expansion of user base, integration of new features)*Experience in service monitoring and troubleshooting/reporting in a production environment*5+ years of experience developing Java/Spring Boot web applications*5+ years of experience designing and developing REST APIs, and familiarity with JUnit testing and code reviews*Experience with relational databases (Oracle or MySQL)*Experience using Tomcat or Weblogic*Experience with Git, Linux, and Gradle*Experience with CI/CD using Jenkins or other tools*Knowledge of container architectures, including Docker and Kubernetes, and experience using them in system development*Communication skills in English Desired skills: *Experience conducting performance/load/stress tests, etc.*Experience using Redis, Kafka, ElasticSearch, Grafana, and Kibana*3+ years of experience developing PHP applications using one of these frameworks*Experience building environments using Kubernetes*Kubernetes certification (CKA or CKAD) Reference No.: 06940-0013365572<img src="https://counter.adcourier.com/c2Fvcmkua29kYWthLjA1MzA5LjEwODk4QHJoaWpwLmFwbGl0cmFrLmNvbQ.gif">

Tokyo,
remote
Contract
9.4M - 9.8M JPY / Yearly
Job Description: [Department Overview]As Japan's largest internet shopping mall service is used by over tens of millions of consumers, we strive to improve through a cycle of hypothesis → verification → analysis → systemization.In addition, in order to provide continuous and stable services under high load conditions during sales and other large events, we take into account various system and service characteristics and optimize the web backend, providing an opportunity to constantly test your engineering skills.[Position Outline]The E-Commerce Marketplace Development Department is looking for a senior backend development engineer for the website. Specifically, you will be responsible for the design, development, and operation of the web system backend, as well as the engineering team and project management, including the following:[Responsibilities]* Understand the priorities of business requirements and deliver high-quality services within a tight schedule.* Lead projects and resolve technical issues for assigned services, or design, develop, test, and release new or existing features. * Design, develop, test, and release projects.* Operational support (responding to inquiries from consumers and merchants, research, operational tasks, etc.) Required Skills:* 5+ years of tech lead experience (architecture design of high-load web systems, technical decision-making, etc.)* Experience leading the design of the entire system with consideration for scalability and maintainability, and strategically leading the future vision of the service (expansion of user base, integration of new features)*Experience in service monitoring and troubleshooting/reporting in a production environment*5+ years of experience developing Java/Spring Boot web applications*5+ years of experience designing and developing REST APIs, and familiarity with JUnit testing and code reviews*Experience with relational databases (Oracle or MySQL)*Experience using Tomcat or Weblogic*Experience with Git, Linux, and Gradle*Experience with CI/CD using Jenkins or other tools*Knowledge of container architectures, including Docker and Kubernetes, and experience using them in system development*Communication skills in English Desired skills: *Experience conducting performance/load/stress tests, etc.*Experience using Redis, Kafka, ElasticSearch, Grafana, and Kibana*3+ years of experience developing PHP applications using one of these frameworks*Experience building environments using Kubernetes*Kubernetes certification (CKA or CKAD) Reference No.: 06940-0013365572<img src="https://counter.adcourier.com/c2Fvcmkua29kYWthLjA1MzA5LjEwODk4QHJoaWpwLmFwbGl0cmFrLmNvbQ.gif">
2026-02-06T05:56:55Z