I am a physicist and system-level programmer specializing in resource-efficient, low-latency software infrastructure. My experience spans the entire spectrum of computing. From Top-10 HPC supercomputer clusters to ultra-low-power 8-bit microcontrollers.

🤖 Warning: This text was largely generated by an AI because my personal garbage collector immediately disposes of any marketing blurb I try to write. However, the contents have been manually verified, refactored, and compiled by myself.

• High-Performance Computing: Over 20 years of experience designing and implementing communication layers (MPI), network drivers (Infiniband, Myrinet, Extoll), and modular supercomputing architectures (MSA). Creator and primary author of pscom, the core low-level communication framework within the open-source cluster communication suite ParaStation.
• HPC Benchmarking: Part of the small core team that conducted Linpack benchmarks on Top-500 systems, achieving Top-10 global rankings with ParaStation twice (JUROPA #10 in 2009, JUWELS Booster #7 in 2020).
• Embedded & IoT Firmware: Low-power optimization, custom bootloaders, secure OTA updates, and bare-metal/RTOS development (nRF52, nRF91, STM32, ESP32, AVR).
• Language & Compiler Engineering: Deep knowledge of compiler design, static analysis, SSA form, DSL design and language runtimes.

CrissCross incremental DOM renderer. A lightweight, zero-dependency alternative to heavy front-end frameworks like React or Angular. Designed for maximum performance and minimal memory footprint, making it ideal for resource-constrained edge devices and responsive web interfaces.

Lightweight threading library for microcontrollers. A highly portable, pure ANSI-C implementation of cooperative multithreading. It requires no assembler code or architecture-specific hacks, bringing clean task scheduling to everything from 8-bit ATtinys to x86_64 systems. Available via the official Arduino Library Manager.

Award-winning hardware & firmware project (Hackaday Coin Cell Challenge 2018). An ultra-compact Charlieplexing design driving 20 LEDs independently from an 8-pin ATtiny, optimizing every GPIO and microampere.

• Community & Networking: Co-organizer of the GDG Cloud Düsseldorf (Google Developer Group). Check out our local developer community space at GDG-Dusseldorf on GitHub.
• Collaborations: I operate as an independent contractor, but I am highly interested in collaborating with technical founders, CTOs, and product innovators in the fields of Green-Tech, Smart Energy, and decentralized IoT infrastructure.

If you are building a meaningful, sustainable product and need world-class expertise to eliminate performance bottlenecks, reduce hardware BOM costs, or optimize power consumption, let's connect.

• 🌐 Website: jens-hauke.de