Telefónica Deutschland NEXT GmbH

Geeny.io IoT Platform

Senior Practice Lead IT/Engineering (CTO of Geeny)

Jan 2017 -

Geeny provides a platform for B2C IoT Devices where devices and apps are separated, especially for streaming data that can be consumed by many different value added services.

For our partners, we offer an end-to-end solution with support which enables a quick market entry, for consumers we provide a clean separation between devices and data which helps control privacy and prevents lock-in.

Here Jeff is responsible for technology and the development team, as well as strategy and platform evangelism.


née DooRFID GmbH

VP Technology

Jan 2016 - December 2016

VP Engineering

October 2014 - Jan 2016

Chief Systems Architect

June 2012 - October 2014

Engineering Consultant

April 2012 - June 2012

KIWI.KI GmbH is an IoT Physical Access as a Service company based in Berlin, Germany. They sell a system for apartment buildings where doors unlock automagically as their users approach them. You could consider KIWI a Hardware/SaaS startup with both B2B and B2C components.

Jeff was brought on as a contractor to KIWI shortly after it was founded, in order to translate the ideas of the founders into a functional prototype using licensed technology which could be used for fundraising.

Following that, he was hired as the Chief Systems Architect, with the primary task to productize the prototype, designing and developing new systems and applications from the mobile phone to the backend, firmware, and even hardware design. The ultimate goal of the KIWI system is to enable new behaviors and modernize residential access control while still strongly guarding user privacy and security.

As KIWI grew, Jeff took on the title and additional roles of the VP of Engineering, establishing a strong engineering team as well as the agile processes and products involved in building and supporting the KIWI system.

Ultimately, Jeff assumed the title of VP Technolgy, being responsible for not just the development and the development team, but also the future direction of the KIWI System.

ClaritySpring Inc.


Technical Co-Founder

July 2011 - October 2013

Hedgefund managers send emails with pages and pages of documents in PDF format to potential investors. Hedgefund investors have to dig through these mountains of documentation to determine if the fund is right for them. Neither the managers nor the investors can measure if their time is well spent.

ClaritySpring is a platform for helping to increase transparency for hedgefunds, allowing managers to gain meaningful insights to their investor activities, and investors to cut through the paperwork saving time and money.

As the technical co-founder, Jeff distilled requirements and built the first version of the ClaritySpring platform. He then oversaw the contractors working on it. Jeff left to focus on KIWI.

Brivo Systems LLC


Embedded Engineer

May 2009 - April 2012

Brivo Systems is a physical access control as a service vendor based in Bethesda, MD USA.

Jeff's work at Brivo primarily focused on products (firmware, web development) that were not connected to the internet, but still configured through a web browser. In addition, he spearheaded an effort to develop the company’s first new hardware product in more than five years.

gWhiz LLC


Lead iOS Developer

2007 - 2009

gWHIZ is a mobile educational software provider. Jeff was hired to port their BlackBerry software to iOS–in the process he was able to introduce software development best practices and laid down the architecture for a host of successful educational apps.

Advanced Acoustic Concepts LLC


Software Engineer

2006 - 2007

AAC is a defense contractor for the US Navy. Jeff worked on documentation, test cases, and developed an automated API testing suite. Clearance was required for this job.

Higher Education

FSU Logo

Bachelor of Science, Computer Science

Minor: Business Administration

Frostburg State University

2009 (graduated)

NYU Logo

Bachelor of Science, Computer Engineering

NYU Tandon School of Engineering

2004 (matriculated) - 2006 (transferred)

Speaking Engagements

Selected highlights of events or conferences where Jeff has spoken, given workshops, and/or mentored.

HARDWARE.co Accelerator

Founder, Mentor, Speaker

Berlin, Germany



Privacy and Security in IoT

Moscow, Russia



Privacy and Security in IoT

Paris, France


IoT Conference

Privacy and Security Talk

Berlin, Germany


Data Natives Conference

Hardware Startup Ecosystem Panel

Berlin, Germany


Startup Pirates

Hardware Entrepreneurship Workshops

Lisbon, Portugal



Hardware Accelerator Panel

Kyiv, Ukraine



Privacy Workshop

Moscow, Russia



Electronic Badges

Brussels, Belgium


Around the Web











Xing Profile



Keywords and technologies

Development Concepts Waterfall/Spiral/Agile, SDLC, Architecture, I18N, VCS, Issue tracking, Product Planning & Effort Management, Hiring, Performance Tuning… Compiled Languages C, C#, Objective-C, Java, C++, ARM Assembly… Interpreted Languages Python, Javascript, Lua, Erlang, Shell, TCL, PHP… Web Development HTML5/CSS, NPM, Backbone.js, JQuery, Flex/AS3/ECMAScript… Database Systems PostgreSQL, MongoDB, SQLite, Oracle, MySQL… Mobile Platforms iOS, Android, WP10 Hardware Design Schematic capture, PCB layout, Prototyping and Manufacturing, ARM SoCs, AVR, PIC, MSP, USB, Ethernet, ISM Transceivers, PoE, SMPS… Open Source Contributions OpenBeacon, DevKitPro, dsyslog, Atheme, Ecks. Many more small patches… Released Mobile Apps iTakeCredit/MerchantPlus, StyleMarks, Triphids, PULSEcamera, gFlash+, AndroidChat… Professional Associations 2007- Assocation for Computing Machinery, 2005-2007 ACM ICPC Competition Volunteering Washington DC: Washington Animal Rescue League, Orange, NJ: Peace House "Accomplishments" Time's "Man of the Year" 2006, Zimbabwean Trillionaire, Redditor [kraln], Married in 2010 to loving, wonderful wife Work Status US Citizen, Holder of EU Blue Card (clear to work in the EU)


Jeff is always interested in talking shop. He prefers to meet in person over coffee or beer, however he is also reachable via email or phone.

Home Base

Berlin, Germany

Mobile Number

+49 (0)157 377 279 89
+1 (240) 423-0144