How to apply for Delivery Manager - Heating and cooling (m/f/d)

About 1KOMMA5°

1KOMMA5° builds an integrated energy system that connects solar, batteries, heat pumps, and e-mobility through its Heartbeat AI virtual power plant. The company operates in over 80 locations worldwide with more than 3,000 employees and aims to transition 1.5 million households to renewable energy by 2030. Working here means contributing to a real-time, automated energy market system rather than isolated hardware components.

About the role

This delivery manager role sits in the Heartbeat Tech domain and owns the heat pump integration and optimization roadmap from end to end. You will coordinate the Integrations Team, manage partner relationships, write software and hardware requirements for partners, and run root cause analyses to keep the platform stable. The work directly shapes how heat pumps perform inside 1KOMMA5°'s virtual power plant.

A typical day

A typical day likely involves calls with heat pump partners about integration requirements, syncs with the Integrations Team on roadmap progress, and digging into platform stability issues with engineers. You would balance writing requirements, reviewing partner deliverables, and running root cause analyses when something in the heat pump integration breaks. Exact routines and team rituals are not described in the posting, so ask about them in the interview.

Who 1KOMMA5° is looking for

• Experience delivering technical roadmaps that involve external hardware or software partners, ideally in heating, cooling, or energy systems.
• Comfortable writing clear requirements for partner software and hardware, and holding partners accountable to them.
• Skilled at root cause analysis and platform stability work, not just feature delivery.
• Able to coordinate a cross-functional integrations team in a remote setting and communicate in English; German is likely useful given the company's DACH roots.

Tips for this application

• In your CV, list specific heat pump, HVAC, or energy integration projects and the partner companies involved, because this role is about managing partner hardware and software.
• Show evidence of end-to-end roadmap ownership, including how you handled partner delays or integration failures.
• Mention any experience with virtual power plants, demand response, or connecting devices to electricity markets, since Heartbeat AI is the core product.
• Demonstrate root cause analysis skills with a concrete example, since the job description explicitly names platform stability as a responsibility.
• If you have worked with German or European heating manufacturers (for example Vaillant, Viessmann, Bosch, or similar), name them, as partner network knowledge is directly relevant.

What to cover in your cover letter

Explain why heat pump integration specifically interests you, not energy tech in general. Describe a time you managed an external partner's software or hardware deliverables and what you did when they slipped. Show that you understand the difference between shipping a feature and keeping a live platform stable. Connect your work to 1KOMMA5°'s goal of controlling heat pumps as part of an integrated, real-time energy system.

Research before applying

• Read how Heartbeat AI controls solar, battery, heat pump, and e-mobility assets as one system, and be ready to explain it in your own words.
• Look up 1KOMMA5°'s acquisitions and regional craftsmanship partners to understand how the partner network is structured.
• Check which heat pump brands and protocols (for example SG Ready, Modbus, or manufacturer APIs) are common in the DACH market, since partner integration is the core of this role.
• Find public statements from 1KOMMA5° leadership about the 2030 target of 1.5 million households and what it implies for integration scale.

Likely interview topics

Based on the job description, expect questions about:

• How would you structure the heat pump integration roadmap across multiple hardware partners with different API maturity levels?
• Describe a root cause analysis you led when a partner integration caused instability in production.
• How do you write requirements for a partner's software and hardware when you do not control their engineering team?
• What metrics would you use to measure the success of the heat pump experience inside a virtual power plant?
• How would you coordinate a remote cross-functional integrations team across time zones and external partners?

Common mistakes to avoid

• Applying with a generic delivery manager CV that does not mention hardware, HVAC, or energy partners.
• Treating this as a pure software project management role and ignoring the partner hardware and root cause analysis parts.
• Claiming interest in renewable energy without showing any concrete knowledge of heat pumps or virtual power plants.