Web Developer at Yi Can Pte. Ltd. in Tokyo, Japan (full-time)

• • . System Architecture Design and Optimization

Design and continuously optimize scalable, maintainable, and high-availability systems based on the Java technology stack, aligned with business growth needs.

• • . Technology Selection and Solution Design

Lead the selection of core technologies and formulate feasible, high-quality technical solutions, including microservices, middleware, and enterprise-level architecture.

• • . Microservices and Distributed Systems

Build and maintain microservices architecture using frameworks like Spring Cloud or Apache Dubbo, promoting service decoupling, modularization, and scalability.

• • . High Concurrency and Performance Tuning

Demonstrate strong expertise in JVM tuning, multithreading, and concurrent programming; conduct in-depth analysis and optimization for large-scale, high-concurrency systems.

• • . Code Quality and Technical Review

Establish coding standards and enforce best practices; participate in code and architecture reviews to ensure high-quality and maintainable codebases.

• • . Technical Problem Solving

Take ownership of solving complex technical issues such as distributed transactions, cache consistency, and message reliability in production environments.

• • . Middleware and Infrastructure Support

Provide deep technical understanding and implementation guidance for commonly used middleware such as Redis, Kafka, MySQL, MongoDB, Elasticsearch, and RabbitMQ.

• • . Team Technical Leadership and Mentorship

Guide and mentor junior and mid-level developers; organize technical training and knowledge sharing to improve overall team capabilities.

• • . Research and Innovation

Keep up with trends in the Java ecosystem (e.g., Spring Boot 3.x, containerization, Kubernetes, Serverless), and evaluate their potential application in real-world business scenarios.

1. Education & Experience

• • Bachelor’s degree or above in Computer Science, Software Engineering, or a related field.
• • + years of Java development experience, with at least 2 years in an architectural or technical leadership role.

• • . Technical Skills
• • Proficient in Java and core frameworks such as Spring Boot, Spring Cloud, Hibernate, and MyBatis.
• • Solid understanding of microservices architecture, distributed systems, and service governance.

Experience with databases (e.g., MySQL, PostgreSQL), caching systems (e.g., Redis), and messaging middleware (e.g., Kafka, RabbitMQ).

• • Familiar with DevOps tools and processes (e.g., Docker, Kubernetes, Jenkins, Git).
• • Strong knowledge of system performance tuning, JVM optimization, and troubleshooting.

• • . Architecture & Design

Deep understanding of system design principles, design patterns, and scalability best practices. Experience in designing high-concurrency, high-availability, and fault-tolerant systems.

• • Ability to conduct architecture reviews and technical risk assessments.

• • . Soft Skills
• • Strong analytical and problem-solving skills.
• • Excellent communication and documentation skills.

Leadership and mentorship ability, with experience guiding development teams. Self-driven, proactive, and capable of working independently or as part of a team. Preferred Qualifications (optional)

• • Experience with cloud platforms such as AWS, Azure, or Alibaba Cloud.

Familiarity with CI/CD pipelines and observability tools (e.g., Prometheus, Grafana, ELK). Open-source contributions or active involvement in the Java community is a plus.