About me

Portrait

Hi,

I am an Analog/Mixed-Signal Design Engineer with a strong interest in practical tooling, open-source EDA, and modern software development.

Outside of work, I am an active musician—singing, playing keys, and guitar in different bands. I also enjoy endurance sports: I started road cycling in 2024 and completed my first marathon in 2025.

Experience & Track Record

Senior Analog/Mixed-Signal Design Engineer

ifm efector GmbH (formerly pmdtechnologies GmbH)
07/2022 – Present
  • Developed a full-stack web tool for corner simulations (ngspice, Python 3, Polars, Parquet, FastAPI, Svelte).
  • System administration of the Red Hat Enterprise Linux (RHEL) environment for Cadence DFII design software.
  • Design and administration of a project-based chip design environment utilizing open-source EDA tools (xschem, ngspice, klayout, magic, xyce, Docker).
FastAPI Svelte Polars / Parquet Cadence DFII Open-Source EDA Docker Red Hat

Analog/Mixed-Signal Design Engineer

pmdtechnologies GmbH
04/2019 – 07/2022
  • Technical sub-project lead for the development and bring-up of a 65nm/65nm stacked BSI technology (TowerJazz) using test chips.
  • Analog Lead for the sensor core of a global-shutter 3D ToF image sensor (DVGA) for consumer and automotive applications.
  • Presented at Image Sensors Europe London 2024.
65nm/65nm Stacked BSI TowerJazz Global Shutter 3D ToF Sensor Core Lead Automotive & Consumer

Analog Design Engineer

pmdtechnologies GmbH
07/2016 – 04/2019
  • Design and layout of 3D ToF image sensors in Infineon 130nm CMOS for consumer and automotive markets.
  • Development of pixel architectures, control and readout circuitry, including Correlated Double Sampling (CDS) and rolling shutter.
Infineon 130nm CMOS 3D ToF Pixels CDS & Readout Circuits Rolling Shutter Full-Custom Layout

Student Assistant & Master's Thesis

pmdtechnologies GmbH / University of Siegen
2011 – 2016
  • Master of Science (M.Sc.) in Microsystems Engineering, University of Siegen (Graduated with 1.7).
  • Master's Thesis (Grade 1.0): "A Study of Using Rolling-Shutter with Rolling-Modulation in Pmd-Pixel-Arrays" (pmdtechnologies GmbH).
  • Research Project (Grade 1.3): "Investigation of Space-Saving Pixel Concepts for 3D Distance Sensors Using Transistor Sharing" (pmdtechnologies GmbH).
  • Student Assistant (02/2013 – 12/2015): Analog circuit design in Cadence DFII, programming dedicated schematic verification tools, and EDA project administration.
  • Bachelor of Science (B.Sc.) in Electrical Engineering / Microsystems Engineering (2007 – 2011). Thesis (Grade 1.3): "Fabrication and electro-optical characterization of alloyed absorption layers made of amorphous silicon".
M.Sc. Microsystems Engineering B.Sc. Electrical Engineering Cadence DFII Pixel Design

🛠️ Open Source Projects

  • libreStage — Full-stack web application for the organization and administration of live bands and music ensembles. The project includes both a web application and a companion iOS app. Parts of the codebase were developed with AI assistance (GitHub Copilot).
  • Wassermonitor2 — Web-based dashboard for storage and tank level monitoring of a drinking water supply system.

📬 Contact

  • GitHub: @calphiko
  • Location: Attendorn, Germany