LUMENKEN
Freelance Senior Hardware Engineer

Welcome

Thank you for visiting LUMENKEN

Smart, efficient and robust custom electronics — from high-speed and FPGA-based systems to microcontroller circuits. Complete hands-on hardware development, from concept and PCB design to tested and validated prototypes.

LUMENKEN
Custom hardware
High-speed PCB design Microcontroller circuits FPGA-based hardware Prototyping & Proof of Concept
01About

Custom electronic solutions, engineered end to end.

I’m Ken Steenis, a Senior Hardware Engineer with over 14 years of experience developing electronic systems. I founded LumenKen in February 2024. What started as a part-time venture alongside my engineering role has grown into a full-time business, focused on designing smart, efficient and robust custom electronics.

I take ownership of the complete hardware development process: from system architecture and component selection to schematic design, PCB layout, prototype bring-up and validation. My expertise includes analog and digital electronics, high-speed PCB design, FPGA-based systems and microcontroller-based circuits. My background in embedded systems also enables me to develop the low-level firmware, drivers and test software needed to bring hardware to life and verify its performance.

Over the years, I have worked on projects ranging from power supplies for mobile robots and battery systems for flying robots to high-performance camera electronics and rugged camera systems. This broad experience helps me translate complex technical challenges into practical, tested solutions.

I enjoy working with small and medium-sized businesses looking for a reliable, technically skilled engineering partner. Whether developing a prototype, demonstrating a proof of concept or improving an existing product, I combine independent technical ownership with close collaboration across firmware, mechanical and other engineering teams.

Capabilities
01System architecture & hardware design
02PCB layout & high-speed design
03FPGA & microcontroller-based hardware
04Power supply design
05Prototype bring-up, testing & validation
06Hardware debugging & system integration

Design tools

Altium DesignerAdvanced
KiCadAdvanced
Cadence / OrCADProficient
Discuss a technical challenge →
02Selected projects

Selected work across networking, IoT, robotics and RF detection.

01MONO · www.mono.si

MONO Gateway — 10Gbps High-Speed Router

LumenKen contributed to the complete hardware development of MONO’s Gateway router, working closely with MONO’s hardware engineer and software team.

My involvement covered system architecture, component selection, schematic design, PCB layout, power supply design, prototype bring-up and debugging. A particular focus was the DDR4 memory interface with ECC, including both schematic design and PCB layout, alongside the router’s high-speed interfaces, including dual 10Gbps SFP+ connections.

Throughout development, I worked across hardware and software disciplines to bring up, test and refine the system.

Key specifications
— 2× 10Gbps SFP+ cages
— 3× RJ-45 Gigabit
— DDR4 with ECC
— USB 3.1
— USB Power Delivery
— 2× M.2 Key-E slots
— NXP Layerscape Quad-Core
02Project

IoT Monitoring

For a client, LUMENKEN was working on IoT devices used to monitor, for example, campsites and holiday cabins. Several modules have been developed with multiple input and output channels, as well as 4G connectivity.

For these modules, I was primarily responsible for the hardware development, but also contributed to the software integration.

Multi-channel I/O 4G connectivity HW + SW integration
03Project

Robotics

LUMENKEN has also contributed to subcomponents for robotics, ranging from power supplies to full system integration.

This was done in close collaboration with the mechanical engineering department to ensure seamless integration into both existing and new setups.

Power supplies System integration Mechanical co-design
04Protectron · Separate company

Wideband RF
Detection System

At Protectron, I am developing a wideband RF detection system for counter-drone applications. My work spans receiver architecture, component selection, schematic design, PCB layout and embedded hardware integration.

Development combines hands-on prototype bring-up with RF measurements, testing and debugging to validate the design and improve system performance.

03Curriculum Vitae

Work experience

2024 — Present
LumenKen B.V.
Founder & Hardware Engineering Consultant

Independent hardware development and consultancy, from system architecture and component selection to PCB design and validated prototypes.

2025 — Present
Protectron
Co-Founder & Lead Technical Engineer

Alongside LumenKen, I co-founded Protectron, a separate company developing technology for counter-drone and electronic warfare applications. I lead the technical development, covering hardware architecture, schematic design, PCB layout, prototyping and validation, in collaboration with international engineering partners.

2024 — 2025
Teledyne Adimec
Hardware Engineer

Electronics for high-speed, high-performance camera systems, research and development involving X-ray imaging sensors, and electronic test systems for production validation.

2022 — 2024
Avular Robotics
Senior Electrical Engineer

Electronics for autonomous aerial and ground robots, including GPS RTK positioning, battery systems and multidisciplinary system integration.

2019 — 2021
Adimec Advanced Image Systems
Development Engineer Hardware

Electronics development for high-speed and high-performance camera systems.

2018 — 2019
TOPIC Embedded Systems
Hardware Engineer

Development and optimization of ECG monitoring systems, with technical support to other engineering teams.

2012 — 2018
Mobics B.V.
Embedded Systems Engineer

Control electronics for camera-based quality inspection systems, embedded machine-control software, complete machine assembly and electrical integration. Worldwide installation, maintenance, troubleshooting and calibration.

Education

2010 — 2014
HAN University of Applied Sciences
Embedded Systems Engineering (HBO)