Hi, I am Johan

Based in Lyon, France, my area of interest and expertise always resided in building highly resilient, efficient, and autonomous systems with innovative approaches.

Selected Projects

See on Codeland →
Awarded Research Video Demonstration Forthcoming

Multi-modal Authenticity Capture in Untrusted Environments

Hardware-level cryptographic attestation fails when peripheral sensors themselves can be spoofed. In adversarial environments, an operational signature only proves that a chip executed an instruction—not that the physical reality it recorded is authentic.

This research couples deterministic photometric sensors and robotic spatial calibration to validate multi-modal physical invariants (light diffusion, spatial motion consistency). If sensor cross-validation violates physical laws, the media stream is marked compromised prior to any cryptographic hashing.

Calibrating physical multi-sensor arrays using an Elephant Robotics myArm M750 robotic manipulator to establish deterministic ground truth for mobile inference models.
150+ Daily Active Users

Lyondle & Custom Transit Ingestion Engine

A public-transit analysis suite disguised as daily geolocation and routing puzzles. Operates entirely on live, irregular GTFS and open transit feeds from Lyon's metropolitan network.

To eliminate query overhead on unindexed public data, I implemented an in-memory ingestion engine and compact temporal graph database. This design reduced hosting overhead to near-zero while enabling sub-millisecond route verifications and immediate failover tolerance.

JDOS: x86 Bare-Metal Operating System

A personal operating system built from scratch to study memory paging, interrupt handling, and hardware abstractions without runtime crutches.

Custom Stage-1 & Stage-2 Bootloaders
Monolithic x86 Kernel Architecture
User-space Ring-3 Isolation
FAT16 / FAT32 Driver Implementation
VGA Mode 13h & 16-bit HW Rendering
Native Disk Read/Write Interrupts