Projects
Applied work, industry experience, and software projects from the OiCOS team.
Renée Menéndez
Monetary theory, credit money, and macro accounting — from dissertation and prolegomena to MoMaT and OiC.OS.
Placeholder — to be replaced by Renée
Renée brings decades of work on book money, central banking, and the institutional structure of credit. This section will summarise industry projects, consulting, publications beyond MoMaT, and applied monetary-policy work. For now: sample paragraph one — regional payment infrastructure, supply-chain liquidity, and how accounting closes in practice. Sample paragraph two — collaboration with treasurers, compliance, and economists who care that the books actually close. Sample paragraph three — blogs on Substack and Soffisticated; research profile under Renée Menéndez.
Edit website/docs/products/projects.md (EN) and the matching file under website/i18n/de/.../products/projects.md (DE).
Viktor Winschel
Industry experience, applied software projects, and academic positions.
Industry Experience
Lizza Ltd. (Mexico)
2025 — Full stack AI social media marketing. Generative AI workflow automation using LLM models (AWS Bedrock, Supabase).
Traxpay GmbH
2024–2025 — Product and banking license design for supply chain finance.
Yobst GmbH
2022–2024 — Co-founder of Yobst, a digital platform for regional farming distribution. Scope: ERP systems, logistics, self-service retail (Hofladen containers), digital governance design. Built on Odoo with custom modules; data pipeline and analytics in Python.
Volkswagen / E3DC
2018–2020 — Digital twins for electric vehicles and solar power. IoT-based simulation of 80,000 solar systems and 30,000 EVs; data-driven customer segmentation.
DNV
2014–2015 — Pumped storage power plant digital twins. Nonlinear dynamic optimization for energy storage decisions.
Metzler / ZEW
1996–1997 — Derivative portfolio simulation at investment bank Metzler in cooperation with ZEW.
media mutant
1994–1996 — Founder and manager of "media mutant", a production company for music videos and short films. Led a team comprising three filmmakers, two directors, and one cameraman—the first generation of graduates from what is now the renowned Filmakademie Baden-Württemberg in Ludwigsburg. Pioneered early media production in Stuttgart, contributing to the city's emergence as a center for the media industry.
Software Projects
OiC.OS engine
2025–2026 — With Renée Menéndez. OiC.OS: executable formal specification of a national accounting system. Full stack from double-entry bookkeeping (Lawvere theory T_DEB) through quadruple-entry profunctor accounting (T_QEB) to Agent-Bank-Central-Bank hierarchies with coend aggregation. Includes coinductive stability proofs, simplex clearing hylomorphisms, AR(1)-stochastic simulations, open-games governance, categorical legal contracts (BGB), and algebraic-effects analysis of the G-W-G' investment cycle.
Coalgebraic DSGE Estimation Engine
2026 — Nonlinear DSGE model estimation. Lazy evaluation reduces huge systems of equations; six nested numerical layers: function approximation, numerical integration, root finding, nonlinear time-series filtering, likelihood evaluation, and posterior approximation (sparse-grid Smolyak integration, dimension-adaptive; automatic differentiation; bisimulation-based model comparison).
Yobst ERP and Platform Architecture
2022–2024 — Designed and partly implemented the ERP system for the Yobst regional farming distribution platform: producer onboarding, inventory and order management, dynamic pricing, logistics for smart self-service farm shops, invoicing, and AI-assisted demand forecasting.
Prosumer
2022 — With Volkswagen, E3DC, Q-nnect, lambdaforge. Software for combined systems of VW e-cars and E3DC IoT home power plants; simulation and structural econometric analysis.
CatAcc
2020 — With B. Beronov. Category-theoretic implementation of accounting systems using automata, based on Algebraic Models for Accounting Systems by Rambaud et al.
Open Games Modelling Framework
2017 — With FPComplete. AWS cloud system with user interface for compositional game theory in Haskell.
Optimal Control of Pumped Storage Plants
2015 — For DNV. Bayesian estimation of nonlinear multi-agent systems in decentralized saving decisions.
Coalgebraic Framework for Games in Economics
2013 — With A. Blumensath. Compositional game theory simulation engine in Haskell.
JBendge
2007 — With M. Krätzig. Java Based Bayesian Estimation of Nonlinear DSGE Models — simulation and estimation for central banks.
Academic Positions
SRH Cologne, University of Applied Sciences
since 2025 — Professor for Quantitative Methods. Lectures in operations research, supply chain operations, digital supply chains, applied statistics, and management information systems.
University of Strathclyde, Glasgow
2018–2020 — Research Associate. Compositional compilers for Open Games in multi-agent AI systems.
ETH Zurich
2015–2017 — Research Associate. Uncertainty quantification and global sensitivity analysis for economic models (Risk Center).
University of Oxford
2011–2016 — Research Collaborator. Programming language design with Prof. Samson Abramsky and Prof. Dusko Pavlovic.
University of Mannheim
2008–2014 — Post-doctoral Researcher. Monetary policy and macroeconometrics, Chair of Prof. Klaus Adam.
2005–2008 — Post-doctoral Researcher. Computational economics, Chair of Prof. Felix Kübler.
2000–2005 — Doctoral Researcher. Ph.D. in monetary and currency policy (summa cum laude, 2005).
2004–2011 — University lecturer: monetary economics, macroeconomics, numerical economics, computational econometrics, artificial intelligence (with CS faculty), and related courses; supervision of 60 seminar papers and 30 theses.
University of Hawaiʻi at Mānoa / ASEcolab
2015–2024 — Associated member of the Adaptive Security and Economics Laboratory (Dusko Pavlovic, Royal Holloway London and University of Hawaiʻi at Mānoa). Research seminars and collaboration on coalgebraic economics and game theory.