Le Zhen
Munich
Summary
Backend and API engineer with experience delivering platform modernization at scale. Modernized REST API architecture for Artemis Learning Platform, improving maintainability and performance across 1,000 endpoints. Expertise includes Java, Spring Boot, microservice architecture, and integration testing.
Overview
3
3
Languages
2
2
years of professional experience
Work History
Software Engineer – Backend & API Development
Technical University of Munich (TUM)
Munich, Germany
09.2025 - 05.2026
- Implemented API changes using Java, Spring Boot, REST, Angular/TypeScript, ensuring compliance with architectural and coding standards through OpenAPI-generated typed clients and models.
- Modernised REST API architecture across ~1,000 endpoints of the complicated Artemis Learning Platform of TUM by driving the adoption of Data Transfer Objects (DTOs), improving data encapsulation, API consistency, and maintainability.
- Refactored backend services in six application domains: Assessment, Communication, File Upload, Modelling, Tutorial Groups, and Exams, enhancing overall service performance and reliability.
- Built automated tooling to measure and monitor API migration coverage, supporting data-driven assessment of the modernization effort.
- Contributed to international open-source development workflow, engaging in code reviews, pull requests, issue tracking, and technical collaboration to improve project quality.
Microservice Testing & Integration
Technical University of Munich (TUM)
Munich, Germany
04.2024 - 08.2024
- Executed component and integration testing for distributed train ticket booking system featuring 41 microservices, ensuring functional reliability and performance.
- Identified and resolved integration issues across distributed services, aiding in defect detection and enhancing overall system consistency during testing.
- Analysed service interactions and integration behaviour across a heterogeneous technology stack, including Spring Boot, Spring Cloud, Node.js, Django, and WebGo.
- Worked with multiple database technologies, including MySQL and MongoDB, to validate service-level data integration and system behaviour.
- Acquired practical experience in microservice architecture, distributed systems, API integration, component testing, and system integration testing, contributing to effective quality assurance processes.
Education
Bachelor of Science - Information Systems
Technical University of Munich
Munich, Germany01-2026
Skills
- Java and C programming
- REST API development and integration
- Microservice architecture
- Nodejs proficiency
- Angular development
- MySQL and PostgreSQL database
- Software debugging, Git Version Control, and code reviews
- Unit testing, Framework testing, and component testing
- Agile and Scrum frameworks
- Data analysis and integration strategies
- Web-based software engineering
- HTML and JavaScript coding
- Cloud computing technologies
- Machine learning fundamentals
- Algorithm implementation techniques
- Microsoft Office proficiency
- Bookkeeping and cost accounting
- Business and Financial planning
- R and MATLAB experience
Languages
Chinese (Mandarin)
Proficient
C2
English
Proficient
C2
German
Advanced
C1
Additional Work Experience
Barista & Service Associate
Haferkater | Munich, Germany
[11/2025 – 06/2026]
- Prepared a range of specialty coffee beverages and breakfast products while maintaining consistent quality and presentation.
- Handled customer orders, payments, product preparation, and daily operational tasks with a strong focus on accuracy and efficiency.
- Responded to customer preferences and special requests while maintaining a positive and professional service experience.
- Collaborated with a diverse team during high-volume periods, demonstrating strong communication, teamwork, adaptability, and time-management skills.
Fashion Buyer & Social Media Manager
- Sourced and curated vintage and second-hand fashion from domestic and international markets based on style, condition, uniqueness, and market demand.
- Managed the end-to-end resale process, including product sourcing, selection, photography, pricing, listings, customer communication, and sales.
- Created original fashion styling concepts, photography, and social media content to showcase products and build audience engagement.
- Developed a consistent visual identity and adapted product selection and content based on customer feedback and market response.
Timeline
Software Engineer – Backend & API Development
Technical University of Munich (TUM)
09.2025 - 05.2026
Microservice Testing & Integration
Technical University of Munich (TUM)
04.2024 - 08.2024
Bachelor of Science - Information Systems
Technical University of Munich