My name is Julien, I am a software engineer based in Hamburg, Germany. Here you can find some of my work.

Disclaimer: Depending on how old the projects are, I may no longer be proud of the respective code.

Find some of my open-source contributions and hobby projects below.

• kosame, a macro-based Rust ORM focused on developer ergonomics, inspired by Prisma and Drizzle.

• lyrebird, a visual editor for intl package localizations (Application Resource Bundle files).
• flutter-braintree, a Flutter plugin wrapping the native Braintree Mobile SDKs.
• flutter-maps-launcher, a simple Flutter package to launch the platform's maps application.
• dart-json-patch, a Dart utility package for the IETF JSON Patch standard.
• password-strength, a password strength estimation utility package for Dart.
• dart-protoc-builder, a build utility for streamlining the compilation of Protocol Buffers to Dart.

• duplex-json-rpc, a transport layer independent JSON-RPC library with calls in both directions written in TypeScript.
• oauth2-client-ts, an extensible OAuth 2.0 client for Node.js and the Web written in TypeScript.
• reactive-grpc, a Node.js package that wraps the traditional gRPC callbacks with strongly-typed Promises and RxJS Observables.

Many of the following projects are showcased on my YouTube Channel.

• voxel-game, a voxel game prototype showcasing stylistic shading written in C++ and OpenGL using my own game engine.
• planet-renderer, a planet rendering prototype written in C++ and OpenGL.
• anicavity, a multiplayer shooter written in Java.
• voxel-engine-hybrid, a voxel engine prototype combining the marching cubes algorithm with plain blocks.
• veletrix-engine, a general purpose game engine written in C++ and OpenGL.
• heightmap-renderer, a heightmap renderer written in C++ and OpenGL.
• low-poly-strategy, a strategy game prototype with a low-poly art style written in C++ and OpenGL.
• the-regular-rectangle, a minimalistic 2D platformer.
• limited-detail-engine, a software octree ray tracer written in Java.

• biceps, a Typst library implementing a CSS flexbox style layout algorithm with wrapping.
• palanta, a visual programming language for paleographers using the Vue.js-based Quasar framework.
• dynamic-wallpaper, a C++ software ray tracer generating beautiful procedural desktop wallpapers.
• protobuf-delphi, a Protobuf runtime for Delphi and Free Pascal.
• chess-bot, a Java chess game with an AI opponent.
• mandelbrot, a simple viewer of the Mandelbrot set written in Java.
• crime-prediction-ai, an AI experiment trying to predict future crime locations.

My bachelor's thesis "Improving Model-Based Reinforcement Learning with Internal State Representations through Self-Supervision" together with the reference implementation muzero-g written in Python and PyTorch can be found on GitHub. The associated research paper is available on arXiv.