Hi, I'm Michael
Fullstack Developer
Over a decade of experience in software development & consulting - creating clean, maintainable fullstack solutions with Java, Spring Boot & preferably Angular
About Me
Michael Wellner
- Fullstack Developer -
As a Fullstack Developer based in Stuttgart, Germany, and now in my late 30s, my expertise lies in creating robust Java / Spring Boot backends, managing data via MySQL / Postgres and intuitive Angular frontends. I hold a Bachelor's degree in Computer Science and bring over a decade of experience focused on clean code, domain-driven design, and agile methodologies that lead to maintainable, scalable solutions. Additionally, I thrive in collaborative environments, utilizing standard industry tools like Git, IntelliJ, Jenkins, etc.
Throughout my career, I've specialized in developing microservice architectures that handle complex business requirements. I enjoy solving challenging technical problems - but always with the goal of delivering real, long-term value. To keep my focus sharp and minimize context-switching, I often work with Pomodoro technique.
I believe in continuous learning, sharing knowledge, and mentoring the next generation of developers.
In the complex world of code, simplicity is the ultimate sophistication.
Fullstack Dev
Building robust microservices and full-stack web applications using Java (primarily the Spring ecosystem) for scalable backends and Angular for responsive, dynamic frontends.
DB & Messaging
Designing and managing persistence layers with relational databases like MySQL and Postgres, and implementing message-driven architectures using RabbitMQ for asynchronous communication.
DevOps
Automating deployments and orchestrating containerized applications with Docker and Kubernetes, while leveraging Bash and Deno for scripting and DevOps workflows.
Tools
Enhancing development efficiency through expert use of tools like IntelliJ IDEA, Git, Jenkins for CI/CD pipelines, and Postman for testing and debugging APIs.
Concepts
Driving software quality through clean code, agile practices (Scrum), and domain-driven design to effectively model complex business logic and ensure maintainability.
Professional Journey
Team Lead Software Development
sidion GmbH | Remote / Stuttgart
Team lead of an interdisciplinary development team at sidion, fostering an open and supportive team culture through regular meetings and informal virtual exchanges. Served as the main contact for both professional and personal matters, supported career development, and handled goal setting.
Senior Software Developer
sidion GmbH | Remote / Stuttgart
Contributed to complex client projects in the finance and healthcare sectors, focusing on the development of modern Java-based microservice applications. Supported architectural decisions, promoted clean code practices, mentored junior developers, and worked in agile Scrum teams using a broad technology stack.
Professional Software Developer
sidion GmbH | Stuttgart
Worked on various client projects across automotive, logistics, banking, and e-commerce sectors, focusing on developing modern Java-based microservice applications. Used a wide range of technologies, worked in agile Scrum teams, mentored junior developers, and emphasized clean code practices.
Junior Software Developer
sidion GmbH | Stuttgart
Contributed to a client project in the automotive industry, focusing on software development using Java, SQL, XML, and IBM DB2. Supported requirements engineering and worked with project management tools like JIRA and Confluence.
Junior Consultant Automotive Engineering
wontec GmbH | Weissach
Worked in product data management at Porsche AG, focusing on optimizing product data integration within the Volkswagen Group. Responsible for an interface between SAP and an IBM host, and developed VBA tools in Excel for project management and quality assurance.
Skills & Experience
Development
Frameworks & Libs
Tools
Concepts
DB & Messaging
Infrastructure
OS
I primarily develop on macOS for its great developer experience, but prefer Linux (Ubuntu/Debian) for server and container workloads.
Stuff
Other stuff with which I have also been able to gain experience here and there
Recent Projects
MaverickWave
A lightweight, modern CSS framework for building responsive websites with elegance and speed.
Build stunning, responsive websites effortlessly with a modern, lightweight CSS framework crafted for speed, style, and flexibility.
Idently
A tiny, stateless, code-based Deno identity server with code login and a JSON user store.
Sometimes you don't need OAuth, Firebase, or Keycloak. You just want a damn code and a JWT.
versions
A bash script to display the version numbers of your tools.
I just want to see the version numbers of all my used tools with one command.
Blog Posts
Data-Oriented Programming in Java - More Data, Less Magic
Data-Oriented Programming in Java promotes modeling data as immutable structures and separating behavior into services. With Java's record, sealed interface, and pattern matching, this approach becomes clean and powerful - enhancing readability, testability, and domain clarity compared to traditional object-oriented design.
Tired of Auth Overkill? Meet idently - Simple, Stateless Deno Identity Gets Smarter
At its heart, idently is my take on dead-simple, stateless authentication built with Deno. The core idea? Forget emails and passwords. Just give users a secret code. They send the code, they get a JSON Web Token (JWT) back.
MaverickWave - I finally published my own CSS framework
After countless false starts over the years, I'm excited to finally share MaverickWave with you - a lightweight, responsive CSS framework I've built for modern web development. This project represents not just code, but a personal milestone in my journey as a developer.
My Digital Handshake - Why I Built My Portfolio Page
My portfolio page at m1well.com isn't just a list of skills or a digital resume - it's my professional statement, a carefully crafted space designed to tell you who I am as a developer.