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Hardware & Firmware Engineering · Vienna, Austria

From concept to
series production.

Custom electronics development for safety-critical and industrial applications. Analogue and digital circuit design, EMC-compliant PCB layout, embedded firmware and conformity assessment — delivered by one engineer, end to end.

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7+Years experience
Ing.Certified engineer
EMCIn-house pre-compliance
EUProjects across Europe
Core capability profile
Circuit designAnalogue / Digital
PCB layoutAltium · KiCad
MicrocontrollersESP32 · STM32 · ATtiny
SimulationLTspice · Fusion 360
FirmwareC / C++ · Python
Test automationLabVIEW · Python
ComplianceCE · EMC · HALT
Smallest board31 × 29 mm
What I do

Engineering services for businesses and inventors.

Whether you are a company scaling a product to series production or an individual with a working idea that needs to become real hardware — the process is the same: understand the requirement, design it properly, prove it works.

01

Circuit design & PCB layout

Complete electronic assemblies from schematic to manufacturing-ready layout, designed for EMC compliance from the first trace.

  • Analogue & digital circuit design
  • EMC-compliant multilayer layout
  • Manufacturing documentation & DFM
  • Prototype procurement & bring-up
02

Power supply & ballast technology

Power electronics for demanding environments — including emergency lighting, MPPT solar controllers and driver stages.

  • Switch-mode power supply design
  • Emergency lighting ballasts
  • MPPT / photovoltaic controllers
  • LiPo charging & boost stages
03

Embedded firmware

Microcontroller firmware in C and C++, from bare-metal drivers to IoT connectivity and production test scripts.

  • ESP32 · STM32 · ATtiny platforms
  • Sensor integration & IoT connectivity
  • Motor and solenoid valve control
  • C-based QA and test scripts
04

EMC testing & CE conformity

Development-accompanying pre-compliance testing so that certification is a formality, not a crisis at the end of the project.

  • EMC pre-compliance measurement
  • EN 55032 / 55035 · EN 61000-4-x
  • Conformity assessment & CE file
  • Environmental simulation / HALT
05

Series transfer & DFM

Bringing a working prototype into reliable, repeatable production — including manufacturing partner communication.

  • Design for manufacturability review
  • PCBA planning & supplier liaison
  • IPC-A-610 / IPC-A-620 conformity
  • Lifecycle-oriented specification
06

Consulting & design reviews

An independent technical opinion on an existing design, a supplier's work, or a project that has stalled.

  • Independent design review
  • Requirements analysis & specification
  • Failure analysis & troubleshooting
  • ISO 9001 quality process support
How a project runs

Four phases. No surprises.

Every engagement follows the same structured path, so you always know what has been done, what comes next, and what it will cost.

01

Requirements

We define what the product must do, in which environment, against which standards — and what it must cost per unit.

02

Design

Schematic, simulation and EMC-aware PCB layout. You receive a design review before anything is manufactured.

03

Prototype & test

Prototype build, bring-up, firmware, EMC pre-compliance and environmental testing until the results are reproducible.

04

Series readiness

Manufacturing documentation, conformity file, CE marking and handover to your production partner.

Ing. Taher El Kafrawy
The engineer behind NormEK

One engineer.
Full responsibility.

Ing. Taher El Kafrawy — hardware engineer with more than seven years of professional practice in electronics, power electronics and embedded systems. Certified engineer (Ing.) by the Vienna Chamber of Commerce.

You deal with the person who designs your board, writes the firmware, runs the EMC measurements and signs the conformity file. No agency layer, no handover, no loss of context between phases.

Client reference

What clients say.

"Mr El Kafrawy took substantial responsibility for guiding the FFG research project I²B towards market readiness. He advised the participating team both technically and on quality management, and contributed significantly to bringing the developed solutions reliably and in conformity with standards towards series production. His pronounced expertise in microcontroller development — in analogue as well as digital circuit design — combined with professional PCB design, was immediately visible in his advice and in the rapid, practical implementation. I recommend him without any reservation."

MH
Dr. DI. Mohamed Hassan
Owner · DM-CONTEC e.U., Vienna
Next step

Have a project in mind?

Send a short description of what you want to build. You will receive an honest assessment of feasibility, effort and cost — before any commitment.

Get in touch
Services

Complete electronics development.

Six core service areas covering the full lifecycle of an electronic product — from the first requirement conversation to the certified, manufacturable assembly.

Who I work with

Two kinds of client.

For businesses

Companies & manufacturers

You have a product roadmap and need engineering capacity, an independent design review, or a specialist to take responsibility for one assembly from concept to CE.

  • Development capacity on demand
  • Responsibility for a defined assembly
  • EMC problem-solving on existing designs
  • Documented, standards-conformant delivery
For individuals

Inventors & small teams

You have an idea, a breadboard, or a working proof of concept — and need it turned into a professional, reliable and legally marketable device.

  • Feasibility assessment before you invest
  • Prototype design and manufacture
  • Firmware and enclosure integration
  • Path to CE marking and first production run
Expertise

Tools, standards
and competencies.

A transparent overview of the technical toolkit — so you can judge quickly whether it matches your project.

Core competencies

Analogue & digital circuit design Power supply & ballast technology EMC-compliant PCB layout EMC / pre-compliance testing Conformity assessment & CE Lifecycle-oriented specification Environmental simulation / HALT Series transfer & DFM Design reviews & commissioning

Tools & software

AltiumKiCadEagle LTspiceC / C++Python LabVIEWFusion 360 Jira · ConfluenceMS Office

Languages

German
Native
Arabic
Native
English
C1

Standards & directives applied

ISO 9001 — Quality management
IEC 60364 / ÖVE·ÖNORM E 8101 — LV installations
EN 50110-1 — Operation of electrical installations
IEC 60664-1 — Insulation coordination
IPC-A-610J — Electronic assembly acceptability
IPC/WHMA-A-620D — Cable & wire harness
EN 55032 / EN 55035 — EMC emission & immunity
EN 61000-4-2/-4/-5/-6/-11 — ESD, burst, surge, dips

Microcontroller platforms

ESP32ESP32-S3STM32F0 STM32ATtiny

AI-assisted engineering

CopilotClaudeGemini ChatGPTDeepSeek

LLM prompting is used deliberately as an accelerator for documentation, test script generation and design exploration — never as a substitute for engineering judgement.

References

Selected work
and experience.

Over seven years of professional practice across emergency lighting, IoT, agricultural technology and photovoltaics.

Hardware Engineer · Electronics
din – Dietmar Nocker Facilitymanagement GmbH & Co KG
Linz, Austria
07/2024 — present
  • Development of power supply units, ballasts and luminaires for emergency lighting
  • End-to-end responsibility for electronic assemblies from concept to conformity assessment
  • Creation of schematics and layouts, analogue and digital
  • Design reviews and commissioning
  • Development-accompanying EMC testing in the in-house pre-compliance laboratory
  • Environmental influence simulation on developed assemblies
Emergency lighting Power electronics EMC CE conformity
Consultant · Hardware & Firmware Development
eyepin GmbH & DM-CONTEC e.U.
Vienna, Austria
07/2021 — 07/2024
  • Consulting on and implementation of customer-specific electronics solutions, from requirements analysis to series production transfer
  • Development of an MPPT controller for variable photovoltaic applications
  • Design and realisation of a solenoid valve controller for the patented FFG project I²B (Intelligent Individual Irrigation System)
  • Compact microcontroller boards: ESP32-S3 dual-core main board (31 × 39 mm), STM32F030 motor controller (31 × 29 mm), ESP32 LiPo charging/boost board
MPPT FFG research project Miniaturised PCB ISO 9001
Hardware & Firmware Engineer
eyepin GmbH — start-up project TipControl
Vienna, Austria
02/2019 — 07/2021
  • Hardware development in the field of microcontrollers and IoT (ESP32, STM32, ATtiny)
  • Schematic creation and EMC-compliant PCB layout design
  • Manufacturing documentation, PCB procurement and prototype testing
  • PCBA planning and communication with manufacturing partners
  • Development of C-based test scripts for hardware quality assurance
IoT Prototyping Test automation PCBA
Project highlights

Selected developments.

Research project

I²B — Intelligent irrigation system

Solenoid valve controller for a patented FFG-funded individual irrigation system, guided from concept towards market readiness.

Solenoid control · Sensor integration · ISO 9001
Power electronics

MPPT solar controller

Maximum Power Point Tracking controller designed for variable photovoltaic applications with fluctuating input conditions.

MPPT algorithm · DC/DC conversion · Efficiency optimisation
Miniaturisation

Compact controller family

A family of space-constrained microcontroller boards: ESP32-S3 dual-core at 31 × 39 mm and an STM32F030 motor controller at 31 × 29 mm.

ESP32-S3 · STM32F030 · 31 × 29 mm
Safety-critical

Emergency lighting ballasts

Power supply units, ballasts and complete luminaires for emergency lighting — a domain where failure is not an option.

Ballast design · EMC · Conformity assessment
Energy

LiPo charging & boost board

ESP32-based board combining lithium-polymer charging and boost conversion for battery-powered IoT devices.

ESP32 · LiPo charging · Boost converter
Quality assurance

Automated test benches

C-based test scripts and LabVIEW-driven test bench automation for reproducible hardware quality assurance in production.

C · LabVIEW · Python
About

Ing. Taher El Kafrawy

Hardware engineer — electronics, power electronics and embedded systems. Based in Vienna, working with clients across the European Union.

Ing. Taher El Kafrawy

More than seven years of experience developing electronic assemblies — from concept through circuit design and EMC-compliant PCB layout to conformity assessment and series readiness.

My practical background covers analogue and digital circuit design, power supply and ballast technology, and microcontroller-based firmware development on ESP32, STM32 and ATtiny platforms. Development-accompanying EMC testing in the pre-compliance laboratory and environmental simulation are part of my routine work, not an afterthought.

I work directly with clients — no agency layer, no handover to a junior. The engineer who quotes your project is the engineer who designs it, tests it and signs off the conformity file.

Currently I am looking for challenging work in the development of innovative products for safety-critical applications. Projects are undertaken throughout the European Union — remotely for design and firmware work, and on site where commissioning, measurement or supplier coordination requires physical presence.

06 / 2026
Electrical safety regulations
bfi Steiermark, Graz — 40 teaching units, final exam passed. Prerequisite for the Austrian electrical engineering trade licence.
03 / 2026
Ingenieur (Ing.) — Austrian engineering title
Certification Body of the Vienna Chamber of Commerce, electrical engineering / electronics. NQF/EQF level 6.
2018 — 2019
Intensive C / C++ programme
PLATIVIO, Vienna — 160 units of private tuition in C and C++.
2012 — 2017
HTL electronics & computer engineering
HTL Wien-West — Matura and diploma examination, EQF level 5. Diploma thesis: "Omni-Robot".
Contact

Let's discuss
your project.

Describe what you want to build. You will receive a realistic assessment of feasibility, effort and cost — with no obligation.

Direct contact

Reach me directly.

Primary office · Austria
Universitätsstraße 10
1090 Vienna, Austria
Area served
European Union — remote collaboration
and on-site engagements
LinkedIn
taher-elkafrawy
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