.Sebastian Stemmer in

.Sebastian Stemmer

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Unternehmensinhaber at DigITup GmbH
📍 Düsseldorf, North Rhine-Westphalia, Germany

Sebastian Stemmer is a freelance expert in core insurance system transformations with over 15 years of industry experience. As the owner of DigITup GmbH in Düsseldorf, he has guided major German insurers, including Allianz and Zurich, through complex IT projects. He is a Certified IT-Project Manager (EURO-FH).

Colleagues describe him as pragmatic and productive, with a holistic view that fluently bridges the gap between IT specialists and insurance business experts.

He has contributed to core system transformations at 6 of the 10 largest insurers in Germany.

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Experience
16 Years
Current Role
Unternehmensinhaber
Location
Düsseldorf, North Rhine-Westphalia, Germany
Personality Overview

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Communication Style
Decision Approach
Work Preference

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Priorities

Topics .Sebastian cares about

Core System Transformation
Specializes in helping insurers manage and implement large-scale core system transformations, from classic legacy systems to modern platforms.
AI-driven Productivity
Actively explores and advocates for the use of AI coding agents and modern tech stacks like Atlassian Cloud to automate enterprise workflows and boost productivity.
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Career

Work history

7-2021
Unternehmensinhaber
DigITup GmbH
1-2018 - 6-2021
Professional Freelancer
Stemmer-Consulting
2-2017 - 12-2017
IT Consultant
adesso SE
9-2014 - 1-2017
Business Analyst
Accenture
8-2008 - 8-2014
Sachbearbeiter
SIGNAL IDUNA Gruppe
In the press

Media appearances

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Education
Betriebswirt
IU International University of Applied Sciences
12-2017 - 6-2018
Certificate
Euro-FH Europäische Fernhochschule Hamburg
Social presence
in
Behavioral profile

DISC profile (public)

DISC behavioral profile

Dominance, influence, steadiness, and calculativeness scores with guidance on how this person prefers to communicate and decide.

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