Cologne, Germany
Jahn
Schlosser.
Payments professional, lecturer, and devoted student of how complex systems can be made genuinely useful for people.
Team Lead
Payments Expert
Lecturer
Public Speaker
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Cologne, Germany
Payments professional, lecturer, and devoted student of how complex systems can be made genuinely useful for people.
I've spent the better part of two decades living and working at the intersection of banking infrastructure and human experience — the place where payment flows, regulatory complexity, and real people's needs all collide.
After studying in Heidelberg, I sharpened my analytical edge at UBS and built deep operational know-how at PwC and ZKB in Switzerland. As a next step, I founded and ran my own venture — SDS, Schlosser Data Services — until it was acquired in 2015.
Today I lead the Customer Success Banks team at Omikron Systemhaus in Cologne, helping financial institutions navigate the fast-shifting world of corporate e-banking. Whether that means guiding a bank through the rollout of Instant Payments, implementing Verification of Payee, or rethinking how the multicash suite of online and mobile apps can serve the next generation of treasury teams — I'm the person who sits between the technology and the humans who depend on it.
Alongside that, I have lectured at IU International University of Applied Sciences, teaching Business English and Change Management. There is something genuinely rewarding about watching a student connect language and leadership concepts to their working life for the first time.
And when I step away from all of that — I bake sourdough bread, I surf when geography allows, and I'm a dedicated husband and father doing his best in Cologne.
Deep hands-on experience implementing real-time payment infrastructure across European banking landscapes, from regulatory interpretation to live rollout.
Guided banks and corporates through VoP implementation — one of the most significant structural changes to European payment processes in the recent years.
Years of product and customer success work on multicash — one of Europe's most established corporate e-banking platforms — across 20+ countries.
End-to-end knowledge of payment hub architecture, SWIFT connectivity, and corporate treasury workflows.
Lectured at IU International University, teaching Business English and Change Management — combining strong language skills with real-world corporate experience to prepare students for professional environments.
Formally trained in Human-Computer Interaction, with years of practical experience designing e-banking interfaces in online and mobile first scenarios mapping complex workflow systems.
The European payments landscape is transforming fast — and the gap between what's technically possible, what regulators require, and what banks actually understand is still enormous. That gap is where I speak.
My talks are built on years of front-line experience: implementing Instant Payments at scale, navigating the VoP rollout with real banking clients, and watching the ISO 20022 migration unfold from the inside. No theory for its own sake, you get me for clear, honest insight from the coalface.
Speaking at industry events and banking conferences across Europe — covering Instant Payments rollout, Verification of Payee, and the evolving landscape of corporate e-banking.
Various industry engagements · Europe2015 – Present
Omikron Systemhaus GmbH & Co. KG — Cologne
Leading the bank-facing customer success function for multicash, Europe's leading corporate e-banking platform. Driving adoption of Instant Payments, VoP, and ISO 20022 across a diverse portfolio of European financial institutions. Regular speaker at industry events and banking conferences.
Ongoing
IU International University of Applied Sciences
Tought Business English and Change Management modules at degree level, combining professional language skills with organisational transformation frameworks. Practical focus throughout — drawing on real-world corporate experience to make the material relevant and immediately applicable for students.
Until 2015
SDS – Schlosser Data Services
Founded and scaled a data services consultancy focused on accounting and financial sector clients. Successfully sold in March 2015.
Earlier
UBS · PwC · Zürcher Kantonalbank
Analytical foundations at PwC and hands-on banking operations at UBS and Zürcher Kantonalbank in Zurich, building broad expertise across outsourcing, offshoring, advisory, and core banking processes.
2012
Stanford University — MOOC
Formal study in HCI — the conceptual grounding for a career-long focus on designing systems that genuinely work for people.
Foundation
Ruprecht-Karls-Universität Heidelberg
Academic foundation in political economy at one of Germany's oldest and most respected universities.
Sourdough, patience, and the quiet satisfaction of a good crust. The antidote to the workday.
Whenever geography allows. There's a particular clarity that comes from being fully focused on a wave.
Home base: Cologne. Where the really important work happens every single day.
Whether you're navigating Instant Payments, looking for a speaker for your banking event, or simply want to exchange ideas — I'm happy to connect via LinkedIn.
