Java developer

На данный момент Senior full stack developer.

Мои компетенции и опыт

Leo Wei

SUMMARY

Senior Full Stack Developer with 9+ years of experience delivering scalable, maintainable, and high-performance backend and full-stack applications. Expert in Java 11, Spring Boot/Web/Security/Data, Maven, Hibernate, PostgreSQL, REST API development, Docker, Kubernetes (basic). Proven track record in designing and implementing backend modules, entity classes, RestControllers, JpaRepositories, writing optimized SQL queries with JOIN operations, performing unit and integration testing, and participating in code reviews. Experienced in Agile Scrum environments, mentoring junior developers, collaborating with cross-functional teams, and maintaining high-quality, production-ready code.

Senior Full Stack Developer

Micron

Sep 2023 – Present Riga, Latvia

Designed and implemented Java 11 backend services using Spring Boot, Spring Web, Spring Security, Spring Data, and Hibernate, delivering modular, maintainable, and scalable applications.

• Developed REST API endpoints, integrated with frontend applications, and supported data access through JpaRepositories and entity classes.
• Wrote complex SQL queries in PostgreSQL, including multi-table JOIN operations, optimizing performance for high-load environments.
• Configured and maintained Docker-based development and testing environments, with exposure to Kubernetes for container orchestration.
• Implemented unit testing and integration testing, ensuring robust code quality, test coverage, and production reliability.
• Participated in code reviews, architecture planning, and task decomposition, mentoring junior developers in Java, Spring frameworks, and backend best practices.
• Refactored legacy code and optimized database queries, entity relationships, and backend workflows, applying OOP and SOLID principles.
• Actively collaborated in Agile Scrum teams, including sprint planning, backlog refinement, daily stand-ups, and retrospective sessions.
• Assisted in designing modular service structures and reusable components, improving maintainability and team productivity

Full Stack Developer

UNECOS SOLUTIONS

Apr нужен доступ к резюме Sep 2023 Riga, Latvia

• Developed Java backend modules using Spring Boot, Maven, Hibernate, and PostgreSQL, implementing modular and reusable service components.
• Created Entity classes, RestControllers, and JpaRepositories, applying SOLID principles and best practices for maintainable backend architecture.
• Optimized PostgreSQL queries with JOINs, indexing, and transaction management, ensuring high-performance data retrieval and consistency.
• Implemented REST API integrations for multiple internal and external services, supporting real-time data access and backend functionality.
• Conducted unit and integration testing, code reviews, and applied CI/CD pipelines using Docker to maintain high-quality production code.
• Collaborated in Agile Scrum teams, performing sprint planning, story point estimation, backlog management, and cross-team communication.
• Refactored legacy modules and improved modular architecture, service separation, and maintainability of backend applications.
• Provided mentorship and guidance for junior developers in Java, Spring, PostgreSQL, and REST API design, improving team skill levels and workflow efficiency.

Frontend Developer

Onez

• Developed interactive frontend applications integrated with Java and PHP backends, using HTML, CSS, and JavaScript for dynamic UI components.
• Assisted backend teams in REST API integration, data validation, and backend logic implementation.
• Participated in legacy code refactoring, applying modular design principles and improving frontend-backend communication.
• Collaborated with backend developers to design entity relationships, API contracts, and database interactions.
• Maintained version control using Git, participated in code reviews, and contributed to collaborative development practices.
• Developed dynamic dashboards and responsive UI templates, ensuring seamless integration with backend services.

EDUCATION

The Hong Kong University of Science and Technology

May нужен доступ к резюме May 2016 Hong Kong

нужен доступ к резюме in Computer Science & Applied Mathematics

LANGUAGES

English

SKILLS

• Java & Backend Development:
  Java 11, Spring Boot, Spring Web, Spring Security, Spring Data, Hibernate, Maven, REST API Design, Entity Class Development, RestController Implementation, JpaRepository Development, OOP, SOLID Principles, Modular Architecture, Unit Testing, Integration Testing, Agile Scrum Practices
• Databases & Data Management:
  PostgreSQL, SQL Query Optimization, Multi-Table JOINs, Indexing, Data Normalization, Transactions, Database Performance Tuning, Query Execution Analysis, High-Load Data Handling
• DevOps & Containerization:
  Docker, Kubernetes Basics, CI/CD Pipeline Configuration, Containerized Development and Testing Environments, Version Control with Git, Automated Deployment
• Frontend Integration & APIs:
  HTML5, CSS3, JavaScript, REST API Consumption, Dynamic Templates, Frontend-Backend Data Communication, Real-Time Data Handling
• Professional & Team Expertise:
  Cross-Functional Collaboration, Mentorship, Code Review, Task Decomposition, Architecture Planning, Technical Guidance, Agile Scrum Methodologies, Problem Solving, Strategic Thinking, High Responsibility, Team Communication