• 🎓 PhD candidate in AI & Networks at the Athens University of Economics and Business, Dept. of Informatics, advised by Prof. Iordanis Koutsopoulos. I work on partitioning DNNs and LLMs for low‑latency inference across resource‑constrained edge devices, and on SDN/SDR for tactical mobile ad hoc networks.

• 🏭 Embedded systems architect in the maritime industry: custom Yocto Linux distributions, wireless sensor networks on Zephyr and FreeRTOS, and systems built to IEC 60945, IEC 61162 and IEC 61162-450, IEC 61174, IEC 62923, IEC 62443 and IACS E26/E27.

• 🧠 Building SynapticOS, an AI‑native RTOS for Cortex‑M33 + NPU microcontrollers built on Zephyr. Inference is the primary workload, not a library bolted onto a scheduler. Three papers on its architecture are on arXiv.

• ⚙️ Upstream contributor to Zephyr RTOS: fixes across the CMake/sysbuild build system, NXP MCX board and devicetree support, flash and USB drivers, cbprintf and driver tests. See my merged and open pull requests. Recognised by The Linux Foundation with the Zephyr Technical Contributor badge.

• 🧪 Distributed Inference Testbed, the experimental platform of my PhD: five Raspberry Pi 4 boards on an isolated 802.11ac network, an edge server, and the NNPM web application that runs every experiment end to end with controlled network and compute conditions, per-layer profiling, power traces and partition optimisation. Runs without hardware in local mode.

• 📄 Latest research: HeadSplit, attention‑head partitioning and inter‑layer speculation for distributed LLM inference at the edge (IEEE SPAWC 2026), and LLM partitioning for low‑latency edge inference (IEEE/IFIP WiOpt 2025).

• 🔧 15+ years across the hardware/software stack: from PCB design and FPGAs to ML and edge–cloud architectures. I have led R&D teams in the maritime, defence and gaming industries.

• 📫 Open to research collaborations and interesting embedded/edge‑AI problems: dimitrioskafetzis@gmail.com · LinkedIn

🚀 What I'm building right now

🖥️ Projects

Edge AI & Embedded Systems
Project	Stars	What it is · Tech
SynapticOS		AI‑native RTOS for Cortex‑M33 + eIQ Neutron NPU (NXP FRDM‑MCXN947), built on Zephyr
EdgeNN		Zero‑allocation C11 inference library for Cortex‑M/A: Dense, Conv, LSTM, GRU, Transformer with INT8
EdgeOrchestrator		Distributed, adaptive resource orchestrator for AI workloads on embedded Linux clusters
edge‑inference‑rt		Memory‑aware runtime for partitioned Transformer inference on constrained devices
axon		Header‑only sensor‑fusion framework: EKF, UKF, complementary filters, Mahalanobis outlier gating

Distributed DNN / LLM Inference (research code)
Project	Stars	What it is · Tech
Distributed Inference Testbed		PhD testbed: partitioned DNN and LLM inference across Raspberry Pi 4 devices and an edge server, driven by the NNPM web app; tc‑netem shaping, load generation, INA260 power, RR/SJF delay model and partition optimisation
HeadSplit		Attention‑head partitioning + inter‑layer speculation for distributed LLM inference at the edge
Distributed Transformer Inference Simulator		Discrete‑event simulator for resource‑aware decoder‑only Transformer inference across edge clusters
DNN Partitioning & Offloading Testbed		Raspberry Pi testbed for layer‑level DNN partitioning: Greedy, SA, GA; power and latency profiling
Video QoE Forecasting		Linear, LSTM, GRU and Transformer forecasters for video QoE from network metrics

Networks & Security
Project	Stars	What it is · Tech
Ryu SDN + Snort Reactive Firewall		OpenFlow controller app that blacklists and drops traffic on Snort IDS alerts
SDN‑MANET Firewall Simulators		Simulators for reactive firewalling in software‑defined mobile ad hoc networks
RNN vs Transformer DDoS Detection		Systematic comparison of RNN and Transformer detectors for transport‑layer DDoS on IoT/5G gateways

Robotics, Maritime & Desktop Tools
Project	Stars	What it is · Tech
Fieldproof		Multi‑domain robotics emulation (UGV, UAV, USV): unmodified ROS 2 stacks against Gazebo, scenario‑driven tests
NMEA Simulator X		Cross‑platform NMEA 0183 and Signal K vessel data simulator over serial, TCP, UDP and WebSocket
Deucalion		Back up an Ubuntu machine to an external drive and rebuild it on new hardware or a new release
Nature for Cooling		Screening‑level decision support for nature‑based urban cooling solutions, developed for Criterra

Upstream open‑source contributions
Project	PRs	What I contributed · Areas
Zephyr RTOS		Build‑system and sysbuild fixes, NXP MCXN/MCXA board and devicetree support, Renesas RA flash driver, USB CDC ACM logging, cbprintf bounds, UART async test stability, OpenTitan PLIC

Where it started (2013)
Project	Stars	What it is · Tech
Snake on Stellaris		Snake written in C for the TI Cortex‑M3 Stellaris evaluation board
Slot Deck for iPhone		The classic slot deck game in Objective‑C on Cocoa

_{Google Scholar, October 2026}

Languages

Embedded & Hardware

AI / ML

Networks, Protocols & Security

Robotics, Tooling & Cloud

_{🎓 BEng Electronics & Nanotechnology (First Class Honours) and MSc Embedded Systems Engineering, University of Leeds · PhD candidate, AUEB
📍 Athens, Greece & Hamburg, Germany · Teaching Fellow at AUEB (Computer Networks, C++, Databases) · Thesis supervisor for BSc and MSc students}