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re-green

Working Student, Product Operations – PV & Heat Pump Modeling

re-green

. Manage and further develop re-vive, the planning software for heat pumps and photovoltaic systems, including AI-assisted development .

Posted 11/8/2026internshipFrankfurt am Main • GermanyEntry Level💰 €17 - €18 per hourWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates strong capabilities in software development with Next.js and TypeScript, alongside a solid understanding of SQL and financial modeling. Possesses a keen interest in renewable energy and the ability to analyze complex data structures for effective decision-making.

Highest-signal resume keywords
Next.js DevelopmentTypeScript ProgrammingSQL Database ManagementFinancial ModelingAI-Assisted Software Development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Software DevelopmentSQLFinancial AnalysisData StructuresWeb DevelopmentAutomated TestingHeat Pump CalculationsPhotovoltaic SystemsInvestment AnalysisWorkflow Automation
Soft Skills
Meticulous ReviewSelf-Directed LearningOwnershipResponsibilityCollaboration
Tools & Technologies
Next.jsTypeScriptSQLExcelN8n
Industry Keywords
Renewable EnergyEnergy ModelingHeating LoadCAPEXOPEXCash FlowIRRDSCRGrid ChargesElectricity Price Components

Tech Stack

Tools & technologies
JavaScriptNext.jsSQLTypeScript

About the role

Key responsibilities & impact
  • Manage and further develop re-vive, the planning software for heat pumps and photovoltaic systems, including AI-assisted development
  • Implement improvement requests and new features from requirements through release
  • Fix bugs and further develop the product using Next.js, TypeScript, and SQL
  • Review billing logic
  • Validate results against proposals, financial models, and real-world operating data
  • Develop automated tests
  • Identify and resolve discrepancies in heating load, seasonal coefficient of performance, CAPEX, OPEX, cash flow, IRR, and DSCR
  • Gather requirements from Sales, Engineering, and Finance
  • Further develop the pricing book and standard assumptions together with the Product Lead
  • Document calculation rules and release notes
  • Learn about energy modeling and support operational processes for photovoltaic and heat pump projects

Requirements

What you’ll need
  • Currently enrolled as a working student
  • Pursuing a degree in Computer Science, Business Informatics, Industrial Engineering, Mathematics, Physics, Energy Engineering, or a comparable field; students from other disciplines are also welcome
  • Strong interest in renewable energy
  • Ability to quickly understand complex data structures
  • Experience with coding and SQL, ideally through personal projects
  • Experience with or interest in AI-assisted software development
  • Experience with or interest in web development using Next.js and TypeScript, as well as databases
  • Experience with or interest in investment analysis and financial feasibility calculations
  • Experience with or interest in financial modeling or Excel modeling
  • Experience with or interest in heat pumps, heating load calculations, and photovoltaics
  • Experience with or interest in electricity price components, grid charges, and surcharges
  • Experience with or interest in workflow automation, e.g., n8n
  • Meticulous when reviewing AI-generated results
  • Willingness to take ownership and build things independently
  • Enjoyment of self-directed learning, taking responsibility, and working on high-quality digital products

Benefits

Comp & perks
  • Travel expense reimbursement for your commute
  • Hybrid work with two days per week on-site