I am an experienced software engineer for all architectures and platforms, from hardware-affine embedded to frontend. I frequently work on roles at senior or team lead level. I run workshops and trainings. I consider myself a wildcard person.
My primary areas of work are big data, platform architectures and working on problems that have been impossible to solve with computers until now. My expertise is a PhD in computational physics and more then 20 years of professional experience in sofware engineering. Over the years, I have taken on various roles, including developer, team lead, architect, analyst, product owner, buisness advisor, founder, chief information officer, supervisory board member and managing director.
Handy-on experience in programming ecosystems and environments, sorted by descending preference:
Data science and AI (15 years)
Wolfram Mathematica ‧ CAS/LISP ‧ SageMath ‧ Sage Cell ‧ Reduce ‧ Octave ‧ Julia ‧ Symbolics.jl ‧ ModelingToolkit.jl ‧ JupterHub/JupyterLab ‧ Scipy ‧ scikit-learn ‧ Pandas ‧ Sympy ‧ Anaconda ‧ Bokeh ‧ Altair ‧ Seaborn ‧ R ‧ ggplot ‧ Matlab ‧ Labview ‧ Modelica ‧ Wolfram SystemModeler ‧ Scilab ‧ TensorFlow ‧ PyTorch ‧ Highlight: Engineered world's first open source collaborative notebook interface with the SageMath Notebook in 2012.
Web Programming (20+ years)
HTML5 ‧ XML ‧ XSLT ‧ SVG ‧ CSS/SCSS ‧ PHP ‧ Perl/CGI.pm/mod_perl ‧ Python ‧ Twisted ‧ Tornado ‧ Django ‧ Flask ‧ Sanic ‧ JS/Typescript ‧ Web Assembly ‧ Websocketing ‧ Web periphery ‧ Figma ‧ d3js ‧ Three.js ‧ Vue ‧ Svelte ‧ Sveltekit ‧ React ‧ node.js ‧ deno ‧ Bundlers and Compilers ‧ LAMP ‧ Apache ‧ nginx ‧ SSGs ‧ Highlight: Fullstack frontend and backend before Web 2.0 times
Embedded Systems (10-20 years)
Analog frontends ‧ ARM Cortex ‧ Nordic ‧ STM32 ‧ AtMega ‧ Arduino ‧ PlatformIO ‧ ETL ‧ ESP-ISP ‧ nRF Connect SDK ‧ FreeRTOS ‧ Zephyr ‧ PIO/FlexIO ‧ C/C++ ‧ ARMv6 Assembler ‧ LLVM ‧ GDB ‧ JTAG ‧ lwIP ‧ MQTT ‧ Node Red ‧ Highlight: Real time, networking and data streaming applications in C++
System Programming and Desktop (20 years)
Linux/POSIX ‧ DOS ‧ C/C++ ‧ libc ‧ Shell Scripting ‧ Qt ‧ GTK+ ‧ wxWidgets ‧ X11/Xlib ‧ SDL ‧ Java AWT/Swing ‧ DBus/COBRA ‧ systemd ‧ Highlight: Developed linux kernel modules and userspace tooling
IP Networking (20 years)
Linux Routing and Firewalls ‧ Cisco ‧ Mikrotik RouterOS ‧ OpenWrt ‧ (x)inetd ‧ IPv6 ‧ VLANs ‧ Wireguard ‧ Message Brokers ‧ Protobuf ‧ gRPC ‧ ZMQ ‧ RabbitMQ ‧ Kafka
High Performance Computing (5-10 years)
MPI ‧ OpenMP ‧ OpenCL ‧ SLURM ‧ PBS ‧ Fortran Co-Arrays ‧ domain-specific frameworks ‧ Remote GPUs ‧ VTK ‧ PyVista ‧ Blender/bpy ‧ HDF5 ‧ Ceph ‧ BeeGFS ‧ HPSS ‧ RHEL ‧ Cray ‧ Highlight: Developed Exascale codes running on 300,000 processor cores
Data Bases and Data Warehousing (+5 years)
Dask ‧ Vaex ‧ Apache Arrow ‧ Apache Spark ‧ Apache Airflow ‧ Pentaho ‧ PowerShell ‧ Neo4j ‧ Redis ‧ MongoDB ‧ HBase ‧ InfluxDB ‧ RDF stores ‧ Gephi ‧ Grafana
DocOps and TeamOps (10 years)
MediaWiki ‧ DokuWiki ‧ Outline ‧ Trac ‧ Redmine ‧ OTRS ‧ Zammad ‧ Sphinx ‧ MkDocs ‧ Docsify ‧ Latex ‧ Forges ‧ Gitlab ‧ Github ‧ Gitea ‧ Gogs ‧ SourceHut ‧ Forgejo ‧ Codeberg ‧ Launchpad ‧ Savannah ‧ Atlassian ‧ Highlight: MediaWiki extension and skin developer. Uses Latex in production.
Container and Cloud (5-10 years)
Docker ‧ Docker Compose ‧ Kubernetes ‧ Talos ‧ Terraform ‧ Ansible ‧ Rancher ‧ Gardener ‧ ArgoCD ‧ Keycloak ‧ Grafana/Prometheus ‧ Golang
I have successfully led heterogenous teams of hardware and software engineers for many years. I also have half a decade of experience in company building and management. My clients range from financial auditing to tech companies and research institutes.
I frequently organize my work via the DenktMit eG (my profile at DenktMit) but I am also available as self-employed independent freelancer. My Freelancing CV contains a listing of selected projects is available on request.