AI & Systems Engineer : building things from the model down to the compiler underneath it.
Portfolio of Paul Witkowski, AI & Systems Engineering student at EPITA (SCIA major). Building everything from agentic LLM tools and medical computer vision to the data infrastructure and systems underneath them.
Flagship projects
EyeSegmentation
Medical & Research
End-to-end segmentation and classification pipeline for retinal Doppler holography images, now running daily in a hospital diagnostic pipeline.
PythonPyTorchUltralytics YOLO11JupyterHugging Face
View repository →DealBoard AI Workspace Copilot
Hackathons
A real-time AI copilot wired into Google Workspace that briefs you before meetings, listens live during calls, and recaps afterward. Built in 6 hours at the Gemini 3 Hackathon Paris.
Next.jsTypeScriptTailwind CSSNode.jsExpressGemini API
View repository →Real-Time Forest Fire Detection Architecture
Systems
A full data architecture and working proof-of-concept for IoT-scale wildfire detection, ~10M devices, ~200GB/day, with sub-second alerting and long-term analytics requirements.
ScalaKafkaSpark Structured StreamingAkka HTTPHDFS
Private repository
Tiger Compiler
From-scratch
A complete compiler for the Tiger language targeting LLVM IR, built from scratch by a team of four across lexing, parsing, semantic analysis, and codegen.
C++LLVMBisonRE/flexAutotools
Private repository
42sh
From-scratch
A POSIX-ish UNIX shell built entirely from scratch in C, hand-rolled lexer and parser, no Flex/Bison, covering builtins, expansion, pipes, redirections, and job control.
CAutotools
Private repository