How to apply for Internship Global Product Management (m/f/d)

About 1KOMMA5°

1KOMMA5° builds an integrated energy system that connects solar, batteries, heat pumps, and e-mobility through its Heartbeat AI platform and virtual power plant. The company operates in over 80 locations worldwide and aims to move 1.5 million households to renewable energy by 2030.

About the role

This internship sits in the Global Product Management team for Service & Maintenance, working on the Heartbeat AI platform. You help identify, shape, and deliver scalable service products such as smart monitoring and maintenance across the markets 1KOMMA5° operates in.

A typical day

A typical day likely involves meetings with product managers and engineers on the Service & Maintenance team, reviewing market requirements, and drafting or refining product concepts for smart monitoring or maintenance. You may also prepare documentation, gather feedback from local teams, or support prioritisation discussions. Exact routines depend on the team, so ask during the interview how the internship is structured.

Who 1KOMMA5° is looking for

• Currently studying or recently graduated in business, engineering, energy, or a related field, with an interest in product management.
• Comfortable working with cross-functional teams and multiple markets, since the role is global and remote.
• Basic understanding of energy systems, solar, batteries, heat pumps, or software platforms; willingness to learn the rest.
• Structured and proactive, able to take responsibility for parts of a product workstream with limited hand-holding.

Tips for this application

• Read the 1KOMMA5° Product & Tech page linked in the job ad and reference something specific from it in your application.
• Show you understand the difference between a product feature and a scalable service product, since the role is about service and maintenance products, not hardware sales.
• Mention any experience with smart monitoring, maintenance workflows, or lifecycle services, even from coursework or side projects.
• Since the role is remote and global, state your time zone and working hours clearly so the team knows how you overlap with colleagues in Germany, Finland, and Australia.
• Apply through the company's own careers page if one exists, not only through third-party job boards, to make sure your application reaches the right team.

What to cover in your cover letter

Explain why service and maintenance products on top of a platform like Heartbeat AI interest you specifically. Describe a time you helped shape or improve a process or product, even in a small way. Show awareness that 1KOMMA5° operates across many markets and that scalable products must work in different regulatory and customer contexts. State clearly what you want to learn during the internship and how it connects to product management in energy.

Research before applying

• Study the 1KOMMA5° website, especially the Product & Tech section, to understand Heartbeat AI and the virtual power plant.
• Look up what a virtual power plant is and how it connects to electricity markets, since this is central to the company's model.
• Check which countries 1KOMMA5° operates in and note any differences in energy markets or regulations that could affect service products.
• Find recent news or press releases about 1KOMMA5° to see current priorities and growth plans.

Likely interview topics

Based on the job description, expect questions about:

• How would you approach identifying which service products are worth scaling across markets?
• What do you know about 1KOMMA5°'s Heartbeat AI platform and virtual power plant, and how do service products fit into it?
• Describe a situation where you gathered input from different stakeholders and turned it into a clear plan.
• How would you prioritise between maintenance features that help one market versus features that help all markets?
• Why an internship in global product management at an energy company, and what do you want to do after it?

Common mistakes to avoid

• Writing a generic cover letter that could be sent to any tech company, without mentioning energy, Heartbeat AI, or service products.
• Claiming deep product management experience when the role is an internship; instead show how your existing skills transfer.
• Ignoring the global and remote nature of the role, for example by not mentioning time zone flexibility or cross-market interest.