Leon Fuessner - Resume

Summary

Experienced Android Developer with 4+ years of professional experience in designing, developing, and deploying scalable mobile applications. Strong expertise in Kotlin, Jetpack Compose, MVVM, Clean Architecture, and Test-Driven Development. Currently based in Brisbane and open to new opportunities with visa sponsorship.

Technical Skills

Languages & Frameworks: Kotlin, Java, Jetpack Compose, XML, Swift, SwiftUI, C++

Architecture & Patterns: MVVM, MVI, Clean Architecture, Dependency Injection (Hilt, Koin)

User Interface: Material Design, Human Design Guidelines

Testing: JUnit, Espresso, Mockito

Development Tools: Android Studio, Firebase, Git, CI/CD (GitHub Actions, Bitrise)

APIs & Databases: REST, GraphQL, Room, SQLite

Additional Technologies: VisionOS, Unreal Engine, SQL, NodeJS

Agile & DevOps: Scrum, Jira, Docker, AWS, Google Cloud

Professional Experience

Software Developer & Research Assistant | Queensland University of Technology

Feb 2025 – Present | Brisbane, Australia

Conducting research on VR/AR solutions in road safety to prevent car accidents.

Software Developer | MaibornWolff GmbH

Apr 2023 – Jan 2025 | Munich, Germany

Developed applications for clients like STIHL and BMW.
3D VR/AR programming and prototyping for BMW using Swift, SwiftUI, Apple Vision Pro, Unreal Engine, and Meta Quest Pro.

Android Developer | Droid-Dojo (Freelancer)

Nov 2021 – Mar 2023 | Remote

Worked on projects for clients like Deutsche Bahn and Joyn.
Developed a private project entirely with Jetpack Compose.

Android Developer | myposter GmbH

Jul 2020 – Oct 2021 | Munich, Germany

Developed multiple features for the Android app in a two-person team.
Originally built with RxJava2, later refactored to Coroutines in a multi-module architecture.
Developed an Android app for the myposter shop, including features for creating photo books and calendars.
Implemented an intelligent photo album creation service using Python.

Android Developer | Spontacts GmbH (formerly Jochen Schweizer)

2019 – Jun 2020 | Munich, Germany

Refactored the Spontacts app (100,000+ monthly active users) to Kotlin and GraphQL.
Implemented a new group feature.
Social networking platform using Java, Kotlin, GraphQL, NodeJS, Firebase, DataBinding, MVVM, and XML Views.

Software Developer | Jochen Schweizer Technology Solutions GmbH

2017 – 2020 | Munich, Germany

Completed an apprenticeship as an IT Specialist in Application Development.
Developed an Android app for the Jochen Schweizer shop, including a voucher management system using Java, Kotlin, MVC, Dagger, and XML Views.

Education & Certifications

Bachelor’s Thesis in Computer Science – Queensland University of Technology (2025)
Bachelor of Science in Computer Science – Ludwig-Maximilians-Universität Munich (2021–2024)
Study Abroad Semester in Computer Science – Universidad de Sevilla (2023–2024)
IT Specialist in Application Development (Apprenticeship) – Vocational School for Computer Science Munich (2017–2020)

Projects & Open Source

Game Memory Manipulation: Reverse-engineering of CS2, implementing a helper tool for memory analysis and manipulation using C++, x64dbg, and Cheat Engine.
RoboRally: Transformed a board game into an online multiplayer game using Java and JavaFX.
MeetUp Talk at Google Developer Group: Android Paging with GraphQL (Link, Slides)

Additional Information

Work Rights: Currently holding full-time work rights in Australia.
Languages: German (Native), English (Fluent), Spanish (Intermediate).
Interests: Mobile Development, 3D programming, Virtual Reality, Augmented Reality, Open Source contributions.