Leon Zimmermann
Software-Engineer at iits-consulting GmbH
Software-Engineer bei iits-consulting GmbH
Essen, Germany
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Born on 21 of June 2000 in Essen, Germany, I began self‑studying Java at age 13 to create video games. Since then I have pursued my passion as a professional software engineer: from a working‑student role and then entry-level job at adesso to my current position at iits‑consulting GmbH.
Core Stack
Backend Development: Kotlin & Spring Boot
Frontend Development: Vue / TypeScript
Notable Projects
Diagnosis & Treatment Search System for healthcare: end‑to‑end design, implementation, and deployment with Docker, Spring Boot, Thymeleaf, PostgreSQL
Billing system for surgeons and therapists with selective contracts with health insurers
Personal Note
I’m always eager to explore new technologies—whether it’s software architecture, DevOps practices or programming languages. Outside of tech, I enjoy reading diverse literature (novels, psychology, economics) and spending time with my wife, dog, family, and friends.
Geboren am 21. Juni 2000 in Essen, Deutschland, habe ich mit 13 Jahren begonnen, Java selbstständig zu erlernen, um Videospiele zu entwickeln. Seitdem verfolge ich meine Leidenschaft als professioneller Softwareentwickler: von einer Werkstudentenposition und anschließend einer Einstiegsstelle bei adesso bis zu meiner derzeitigen Position bei iits‑consulting GmbH.
Kernstack
Backend‑Entwicklung: Kotlin & Spring Boot
Frontend‑Entwicklung: Vue / TypeScript
Bedeutende Projekte
Diagnose‑ und Therapie‑Suchsystem für das Gesundheitswesen: von der Konzeption bis zur Implementierung und dem Deployment mit Docker, Spring Boot, Thymeleaf und PostgreSQL
Abrechnungssystem für Chirurgen und Therapeuten mit Selektivverträgen bei Krankenkassen
Persönliche Bemerkung
Ich bin stets bestrebt, neue Technologien zu erforschen – sei es Softwarearchitektur, DevOps‑Praktiken oder Programmiersprachen. Außerhalb von Technologie lese ich gerne vielfältige Literatur (Romane, Psychologie, Wirtschaft) und verbringe Zeit mit meiner Frau, meinem Hund, meiner Familie und meinen Freunden.
Area of Expertise
Topics
Predictive Test Execution for Large‑Scale Spring Boot Projects
Long‑running tests are a common pain point in large codebases, draining developer focus, slowing feedback loops, and hindering rapid learning. While many established strategies exist to cut test times in small projects, they rarely suffice for enterprise‑grade Spring Boot applications. This talk will first revisit the fundamentals of test‑runtime optimization to set a shared baseline, then dive into advanced, predictive test‑execution techniques that scale. We’ll explore three key approaches—git‑diff‑based, dependency‑graph‑based, and machine‑learning‑based execution—to identify only the tests that need running. Participants will learn how to evaluate existing tools, weigh their trade‑offs, and decide which strategy fits their workflow. Practical guidance will cover integration into local development and CI pipelines, enabling teams to dramatically reduce test times and elevate developer productivity and satisfaction.
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