
Dr. Themo Voswinckel
Themo is CEO and Co-Founder of Maesn and owns the domain side of the platform: ERP and accounting use cases, new integrations and the vendor relationships across Europe. Before Maesn he spent around five years consulting on software strategy and ERP projects, alongside a doctorate at RWTH Aachen.
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He works on how ERP and accounting systems actually behave: which data sits where, what a general ledger can and cannot do, and how a use case gets built on top of that. The vendor relationships across Europe are his too, which is where most of what the guides describe is first found out.
Experience in ERP and accounting software

On the Finance Summit main stage
The Accounting Summit speaker directory lists him with Maesn for the startup awards on the Finance Summit main stage. Maesn is listed again among the startups for the 2026 Accounting Summit in Düsseldorf.
Speaker profile at accountingsummit.euDoctorate on ERP as a service
Dr.-Ing. at RWTH Aachen in production IT, on ERP as a service, modularisation and best-of-breed software architectures: how a company can combine its business software freely and what reliable data exchange between those systems takes.
Five years of ERP selection and implementation
Consulting on software strategy, software landscapes, ERP selection and ERP implementations for companies in industry, automotive, banking and insurance, with the order-to-cash and finance processes at the centre.
SAP S/4HANA certifications
Alongside years of working directly with the ERP and accounting vendors across Europe. Those relationships are where new integrations get scoped and where a system's behaviour gets confirmed before anyone builds against it.
Where the domain knowledge comes from
- Alongside the doctorateStrategy consulting, around five years
Software strategy, software landscapes, ERP selection and ERP implementations for industry, automotive, banking and insurance clients. The recurring thread was digitising order-to-cash and finance processes and getting separate business applications to work together.
- DoctorateDr.-Ing., production IT, RWTH Aachen
Research on ERP as a service, modularisation and best-of-breed software architectures, done at the FIR research institute. The question was already the one Maesn answers: how to split what a company needs across several systems without losing the data exchange between them.
- 2012 to 2017Industrial engineering and business administration, RWTH Aachen
With study periods at Audencia Business School in France, in Singapore and in Brazil. The business half is where the accounting and finance process knowledge comes from.
Business software should not be a network of data silos. The easier systems can talk to each other, the faster a company can digitise a new process. In a world where AI accelerates how software gets built, integrations become the critical infrastructure.
Research institutes, stages and communities
He stayed close to the FIR research institute at RWTH Aachen, where he did his doctorate and which runs the Aachener ERP-Tage, and he is a regular at ERP and business application events and in SaaS and tech founder communities.
9 articles by Themo

DATEV Partnership Guide: Approvals and Marktplatz Listing
DATEV publishes no tiers and no fee. It asks for two approvals before your first customer can connect, and a Marktplatz listing needs 25 live customers first.
Dr. Themo Voswinckel · 10 Aug 2026
Webhooks in ERP and Accounting: Which Systems Push Events
Most ERP and accounting systems have no native webhooks. Which ones push events, which model they use, what their payload carries and what to do about the rest.
Dr. Themo Voswinckel · 21 Jul 2026
QuickBooks Partnership Guide: Fees and Marketplace Listing
Intuit meters what you read and not what you write. Four tiers, four rate cards, and on the free tier the calls above your credits are blocked rather than billed.
Dr. Themo Voswinckel · 13 Jul 2026
Xero Partnership Guide: Tiers, Fees and App Store Listing
Xero retired revenue share in March 2026. Five tiers now price connections and the data you read, writing stays unlimited, and the App Store starts at Plus.
Dr. Themo Voswinckel · 9 Jun 2026
How to Integrate DATEV E-Rechnungsplattform with PEPPOL
DATEV routes e-invoices over PEPPOL, and the document route into DATEV is the one you can build against today. What it carries and which product takes it.
Dr. Themo Voswinckel · 18 May 2026
Accounting Integration Partnerships: Marketplace Listings
Every ERP and accounting platform sets its own partner terms. Which systems need an app registration, what a marketplace listing asks for and what it returns.
Dr. Themo Voswinckel · 13 Apr 2026
DATEV Unternehmen Online or Rechnungswesen: How to Choose
One object can be written to both DATEV products. Which one your integration needs follows from that, and from what only Rechnungswesen gives back.
Dr. Themo Voswinckel · 8 Apr 2026
Why Accounting and ERP Integrations Are Hard to Build
Fragmented markets, interfaces from REST to file transfer, and vendor documentation you often cannot reach. What integration work in this market really involves.
Dr. Themo Voswinckel · 1 Apr 2026
Maesn Funding Round: 2.3 Million Euro for the Unified API
Maesn closed a 2.3 million euro round with get.de as a new investor, alongside Tiny Supercomputer Investment Company and NRW.BANK. What the money is for.
Dr. Themo Voswinckel · 4 Nov 2025Bring Themo your hardest case.
Which system holds the data, what it will and will not give you, and what that means for the use case you are building.