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greenventory Tech Stack

Digital twin platform for municipal energy system planning

Data Infrastructure and Analytics Freiburg, Baden-Württemberg 51–200 employees Founded 2019 Privately Held

greenventory builds software for city-level energy infrastructure planning, combining geospatial data, simulation models, and AI to support the transition away from fossil fuels. The stack is Python-heavy (FastAPI, Flask, Django) with a React Native mobile layer and recent OpenAI API adoption—typical for a data + simulation-driven product. Hiring velocity is accelerating across sales, data, and engineering roles, but test infrastructure gaps (unreliable suite, expanding coverage) suggest the platform is outpacing QA maturity as customer adoption scales.

Tech Stack 12 technologies

What greenventory Is Building

Challenges

  • Urban energy transition challenges
  • Optimizing automated test suite
  • Expanding test coverage
  • Adapting to climate change and geopolitical uncertainty
  • Acquiring renewable energy projects
  • Supporting many customers in energy transition
  • Expanding sales in the energy sector
  • Heat planning for german cities
  • Data-driven energy planning for cities
  • Unreliable test suite

Active Projects

  • Data analysis and preparation for energy planning
  • Maintain existing automated test suite
  • Develop automated tests for critical features
  • Simulation model for urban energy planning
  • Implementing sustainable energy concepts in districts
  • Developing new participation and communication forms
  • Renewable energy project acquisition
  • Geo data processing for energy planning
  • Quality assurance of calculated results
  • Customer training on software platform

Hiring Activity

Accelerating15 roles · 8 in 30d

Department

Sales
4
Data
3
Engineering
3
Design
1
Marketing
1
Product
1
Support
1

Seniority

Intern
7
Mid
7
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About greenventory

greenventory is a Freiburg-based startup (founded 2019, spinoff from Fraunhofer ISE and KIT) that provides decision-support software for cities planning renewable energy transitions. The platform combines geospatial analysis, digital twin simulation, and heat-demand forecasting to help municipalities design district-level energy systems and acquire renewable projects. Customers are primarily German local governments and energy planners. The product spans data ingestion (geo-sourced), modeling (urban energy simulations), and training—reflected in active work on test automation, result validation, customer enablement, and renewable project sourcing.

HeadquartersFreiburg, Baden-Württemberg
Company Size51–200 employees
Founded2019
Hiring MarketsGermany

Frequently Asked Questions

What tech stack does greenventory use?

Python (FastAPI, Flask, Django), JavaScript, TypeScript, React Native, Kotlin, Java, Figma for design, and OpenAI API. Stack is data-and-backend-heavy with light frontend mobile support.

What is greenventory working on?

Data analysis for energy planning, urban energy system simulations, geo-data processing, heat-demand forecasting for German cities, renewable project acquisition, test automation, and customer training on the software platform.

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