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Fehr GmbH

The Solution Enablers

Research Development Security Consulting Management Design
We take on the projects others won’t.
Unique projects and challenges fascinate us. Whether it's reverse engineering a 20-year-old access control system to achieve cloud interoperability or building an innovative start-up from scratch — we bring over a decade of hands-on experience in each discipline to make it happen.
Our team brings deep expertise in niche fields — reverse engineering, embedded security and AI. Meet our leading members below. Our design department, Design needs Detail, ensures your brand identity is consistently and creatively reflected.
Dominik Fehr

Hello & Welcome!

Don't hesitate to send me an informal e-mail, you're welcome!

Dominik Fehr
Founder & Managing Director
Funda Fehr

Meet our design department!

Design needs Detail

Funda Fehr
Creative Director & Project Manager

Our Services

Tailored solutions for your digital challenges.

Consultation

Digital transformations, security, strategic consultation or classic solution finding for your processes — we've got you covered.

Cross Platform Development

Windows, Linux or Mac? Desktop, mobile or wearable? Cloud or On-Premise? We develop cross-platform and always fit your needs.

Security

Hardware or software, we conduct in-depth security analyses and deliver clear, actionable reports. From penetration testing to vulnerability research — we trace your bugs before someone else does.

Project Management

Agile workflows, milestone tracking and clear ownership. We establish structured processes that keep your project on time and your team aligned.

Research

Understanding how processes, software or hardware work is essential for creating interfaces and updates. Knowledge and documentation nonexistent? Whether it's reverse engineering or code analysis, we'll uncover what you need.

Data Science

We analyse your business data to surface patterns, automate decisions and build predictive models. From raw datasets to production-ready ML pipelines — we turn data into competitive advantage.

Our Works

A selection of our projects

RomScope

RomScope

GPU-accelerated ROM bit extraction from semiconductor die photographs. RomScope automates the full pipeline from SEM image to decoded firmware: FFT-based grid detection, CUDA-powered bit classification, design rule checks, and a 576-configuration brute-force decoder — all in a single native application.

Category: Security, Product

Technologies: Python, PyTorch, CUDA, FFT, Qt

Link: romscope.com

USBane

USBane

Open-source USB security research framework for the ESP32-S3. Bypasses standard USB stack validation by accessing the DWC2 controller directly, enabling raw protocol-level security testing. Ships with a web UI, REST API, OpenAPI docs, request chaining with flow control, and automated bruteforce capabilities.

Category: Security, Product

Technologies: C, ESP-IDF, JavaScript, REST API, OpenAPI

License: GPL-3.0 (Open Source)

Link: github.com/Fehr-GmbH/USBane

BlackLeak

BlackLeak — CVE-2024-30212

Proof-of-concept exploit for CVE-2024-30212. Demonstrates how a malicious USB mass storage device can exfiltrate sensitive data from a host system by abusing protocol-level trust assumptions in the USB MSC stack.

Category: Security, Product

Technologies: C, libusb, USB Mass Storage

License: MIT (Open Source)

Link: github.com/Fehr-GmbH/blackleak

SP-1 Update Utility

SP-1 Update Utility

Reverse engineered the firmware of the unreleased Kanye West Stem Player (by Teenage Engineering) and built a browser-based update tool using WebUSB. Gave device owners a way to flash firmware without any official support or proprietary software.

Category: Security, Product

Technologies: Reverse Engineering, WebUSB, JavaScript

Link: solderless.engineering

ChancenWerk e.V.

ChancenWerk e.V.

Built the digital infrastructure for a non-profit that provides educational support to children with migration backgrounds across German schools. Designed and delivered their platform for managing on-site and remote tutoring at scale.

Category: Client Work

CodesDirect B.V.

CodesDirect B.V.

Led the DACH market expansion for the largest digital gift card provider in the Benelux region. Developed core API components for their transaction pipeline and managed the rollout across Germany, Austria and Switzerland.

Category: Client Work

bluepolicy

bluepolicy

Developed deep-learning computer vision pipelines that interface with industrial inspection hardware. Built the bridge between their ML models and industry-standard machine protocols for real-time quality control on production lines.

Category: Client Work

Edison Evo

Edison Evo

Engineering partner for an EV accessories manufacturer. Developed embedded firmware and companion software for aftermarket enhancement devices spanning scooters, e-bikes, motorbikes and passenger vehicles.

Category: Client Work

Confidential Clients

Confidential Clients

A significant share of our work falls under NDA — particularly in security research, vulnerability assessment and defence-adjacent consulting. We appreciate the trust of clients we cannot name publicly.

Category: Client Work, Security

Why Choose Us

Peer-Reviewed Quality

Every deliverable passes automated CI pipelines and a mandatory four-eyes peer review before it reaches you.

Clean, Readable Code

Human-readable, well-structured solutions with documented APIs that third parties can integrate without hand-holding.

Modular by Design

Every component is built for reuse. Swap, extend or replace parts without rewriting the rest of the system.

Full Documentation

Architecture decisions, API references and runbooks — delivered digitally alongside every project, not as an afterthought.

No Corporate Layers

Talk directly to the engineers doing the work. No account managers, no ticket queues — fast decisions, honest answers.

Continuous Learning

Our team trains on real-world challenges daily. Proven skills and curiosity matter more to us than credentials alone.

What Our Clients Say

Dominik is extremely patient and helpful. His expertise is top-notch and his knowledge of the subject matter is excellent. Would recommend him and the services on offer in a heartbeat!

— Roy Wijkstra, CodesDirect B.V.

Working with Dominik has been amazing! Great service and always quick to answer my questions. Can definitely recommend him!

— Amrish Gayadien, fansupply.com

Dominik Fehr delivered high quality work on time. Communication with him is always pleasant and efficient.

— Thomas Hunger, Playfire Ltd.

This is the work of genius by the way, bravo!

— Tony M.

Interested in working with us?

We'd love to hear about your project and explore how we can help bring it to life.

Contact

We’re available for new projects.

Address
Fehr GmbH
Blumenthal 6
59457 Werl
Germany
Email
info [at] fe [dot] hr