Ortwin Kartmann-Business & Tech Consultant
Check rate
Experience
Business & Tech Consultant
OK Venture GmbH
- Developing go-to-market strategies to achieve product-market fit
- Challenging and improving the product roadmap with a focus on real customer needs
- Scaling and coaching of software development teams (Scrum, Kanban, SAFe)
- Increasing the speed & quality of tech teams
- Enhancing product demos & sales pitches
- Implementing KPIs (key performance indicators) and OKRs (Objectives and Key Results)
- Development and implementation of use cases on how AI makes the product better
Founder & Co-CEO
Shopgate GmbH
- Responsible for the German market
- Extended product offering with omnichannel services
- Played a more active part in fundraising and investor relations and secured a new funding round
Founder & Managing Director
OK Venture GmbH
- Management of investments and assets
Founder & CPO/CTO
Shopgate GmbH
- Main responsible for strategic roadmap planning & development of the platform
- Established a highly efficient agile development environment (Scrum, Kanban, SAFe)
- Hired more than 100 tech talents (Product Owner, Architects, Developers, DevOps, QA Tester, etc.)
- Automated every single process within the organization
- Established KPIs for the product and OKRs for the entire company
- Developed a highly available SaaS platform for mobile commerce websites and shopping apps
- Delivered the service to more than 5000 merchants with millions of products and customers
- Developed plugins for almost all shopping cart systems and integrations with more than 50 payment providers
- Tripled revenue every year in the first years and doubled it later
- Achieved a significantly higher conversion rate (up to 40%) for mobile websites than for responsive websites
- Achieved a retention rate in shopping apps twice as high as on the website
Co-Founder & CPO/CTO
Tibidono Handelsinnovationen GmbH
- Defined the product strategy and developed the MVP
- Hired and coached a strong tech team
- Managed security audits to get listed in all SPAR supermarkets across Austria
- Completed the SPAR listing within 12 months after project start, including updating all POS systems
- Maintained a constant high availability of >99.99%
- Onboarded over 20 customers presenting their gift cards in SPAR stores
- Hired a replacement for the operational position after successful SPAR listing
- Sold shares to InComm in 2015
Co-Founder & Managing Director
Simty GmbH
- Developed the first iPhone & Android app for buying parking tickets
- Reduced the time to buy a parking ticket from 3-5 minutes to an average of 30 seconds (including launching the app)
- Implemented a smart mapping service for allocation of parking zones to parking rates (based on GPS coordinates)
- Implemented a fully automated billing and payment system
- Scaled the company to >25,000 parking tickets per month
- Launched the service in 15 cities in Germany and Austria
Co-Founder, Inventor Sofortüberweisung & CPO/CTO
Sofortüberweisung / Payment Network AG
- Invented the payment method Sofortüberweisung
- Created the first logo for the new payment method
- Developed the MVP within 3 months with a very small team
- Hired and managed a strong tech team for product & development
- Owned the roadmap and all development activities
- Reached product-market fit within 2-3 years after launch
- Reduced costs for online merchants by more than 60% compared to credit cards and 40% compared to prepayment
- Fully automated the payment process for merchants
- Reduced warehousing costs by shipping products faster
- Enabled online customers to receive products 1-2 days earlier
- Improved onboarding time for new customers from 2-3 weeks to 1-2 days
Co-Founder & Managing Director
People.de Network GmbH
- Created an internet community with more than 500,000 active users
- Developed the first version of online coaching through nachhilfe.net
- Created a music-sharing platform mp3lieder.de
- Created an online shopping network (shopping55.de) with >€1m in revenue per month
Founder
referate.de
- Built the most popular website for students
- Learned by doing: coding, analyzing, improving, repeating
- Published over 5,000 papers & homework from 23 school subjects
- Achieved more visits than Spiegel Online in 1998
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Retail, Banking and Finance, and Education.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Product Development, Project Management, Information Technology, Operations, Investments and M&A, and Marketing.
Summary
As a seasoned tech entrepreneur and consultant, my career has been defined by pioneering digital transformation and pushing the boundaries of innovation.
With a strong entrepreneurial spirit, I seek freelance opportunities that leverage my extensive experience in business development, technology, and startup growth.
I aim to contribute to projects with significant impact, leveraging my expertise to drive growth and success in challenging and high-stakes environments.
Skills
- Entrepreneurial Mindset
- Hands-On Mentality
- Business Development & Strategy
- Product Management Excellence
- Advanced Technical Acumen
- Agile Management & Leadership
- E-Commerce & Payment Expertise
- Artificial Intelligence Integration
Languages
Education
THM
Diploma · Business Informatics · Friedberg, Germany · 1.0
Weidigschule
Abitur (German high school diploma), major in math and physics · Butzbach, Germany
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Ortwin is based in Frankfurt am Main, Germany.
Ortwin speaks the following languages: German (Native), English (Advanced).
Ortwin has at least 30 years of experience. During this time, Ortwin has worked in at least 8 different roles and for 7 different companies. The average length of individual experience is 3 years and 4 months. Note that Ortwin may not have shared all experience and actually has more experience.
Based on recent experience, Ortwin would be well-suited for roles such as: Business & Tech Consultant, Founder & Co-CEO, Founder & Managing Director.
Ortwin's most recent position is Business & Tech Consultant at OK Venture GmbH.
In recent years, Ortwin has worked for OK Venture GmbH and Shopgate GmbH.
Ortwin is most experienced in industries like Information Technology, Retail, and Banking and Finance. Ortwin also has some experience in Education.
Ortwin is most experienced in business areas like Product Development, Project Management, and Information Technology. Ortwin also has some experience in Operations, Investments and M&A, and Marketing.
Ortwin has recently worked in industries like Banking and Finance, Information Technology, and Retail.
Ortwin has recently worked in business areas like Investments and M&A, Product Development, and Project Management.
Ortwin attended THM for Business Informatics.
The availability of Ortwin needs to be confirmed.
Daily rate distribution
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Average rates for similar positions
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The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 7 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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