I'm Yu Heydemann.

Full-Stack DeveloperJava & Spring BootCloud & MicroservicesAI ApplicationsOpen Source

About me

I’m a full-stack developer focused on building practical software systems across cloud, backend services, and AI-enabled products. I care about clean implementation, reliable architecture, and turning complex requirements into usable products.

Focus:Cloud, Code & AI
Languages:English, German, Chinese
Stack:Java, Spring Boot, Python, JavaScript
Interests:Microservices, LLMs, clean architecture

Experience

Full-Stack Developer

Java, Spring Boot, Angular, Next.js/Recent work

REST APIs
Microservices
Authentication
CI/CD

AI Product Builder

LLM chatbot and developer tooling/Recent work

LLM Integration
Prompt Workflows
Python
User Interfaces

Projects

Ticketapp

A comprehensive ticketing system built around microservice architecture.

Microservices
Spring Boot
System Design

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LLM Chatbot

AI assistant interface with natural language processing capabilities.

LLM
Next.js
AI UX

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E-Commerce Platform

Full-stack commerce workflow with Angular and Java Spring Boot.

Angular
Java
API Design

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Skills

Code

Java
Kotlin
Python
Spring Boot
JavaScript

Platforms

Linux
Kubernetes
Android
Terraform

Tools

VS Code
Docker
Git
AILLMs