Founder's Associate Intern

Berlin based | German native speaker | Full-time – Internship or permanent position | Rolling intake

About us

Heidi Systems is building the Energy OS for Real Estate. To do this, we are digitizing one of Europe's last large analog markets and creating the infrastructure for intelligent energy management in buildings.

Where we stand:

• 8 people
• Strong pipeline with +5,000 active deals
• Angel round with unicorn founders as well as directors from Google and OpenAI
• On the way to 10x in 2026

We are revolutionizing the metering service industry – a huge, dusty market that has hardly been touched for decades. As a PropTech and ClimateTech company, we combine software, IoT, and operations into a platform that makes energy and consumption data consistently digital, transparent, and available in real-time for the first time. In doing so, we are creating the basis for intelligent and efficient energy infrastructure for buildings.

We are growing strongly and have just successfully completed our angel round. Our investors include, among others, unicorn founders and directors from Google and OpenAI.

As a Founder's Associate, you will work directly with our founder Paul. You will sit at the table with us, take on responsibility from day one, drive your own initiatives, and bring strategic and operational topics to completion.

Responsibilities

• You will work directly with the Founder on high-leverage projects – across Operations, Sales, Product, and Strategy
• From day one, you will take on concrete operational responsibility – you will own your own customers and properties end-to-end, from onboarding new partners, managing property management companies, installers, and suppliers, to final handover
• You will identify manual and repetitive processes, implement no-code and low-code solutions (e.g., n8n workflows, Claude Code), and thus measurably increase efficiency in daily operations
• You will support fundraising as well as on-site customer and partner meetings
• You will keep track of everything – know at all times where things stand, what is missing, and who is waiting for what
• You will drive your own initiatives from idea to implementation – translate unclear problems into concrete plans and bring them to a close with measurable results
• You understand numbers, conduct market and competitor analyses, and derive decisions from them
• You will build internal systems for reporting, documentation, and tracking that are actually used and actively contribute suggestions for improvement

Qualifications

How you tick

• You are eager to prove yourself – not someday, but now
• Quick comprehension and ownership mentality: You need context, not instructions – and you complete tasks cleanly and with an eye for detail
• Initiative is your default – you don't wait for instructions and independently familiarize yourself with new topics, tools, and processes
• You take yourself seriously: Sports and personal growth are not a nice-to-have for you

What you bring

• Ongoing or completed Bachelor's or Master's degree in Economics, a technical field (e.g., Industrial Engineering), Real Estate Management, or a similar field
• Ideally, 2+ years of relevant internships and/or professional experience in a startup, consulting, M&A or VC/PE environment, in Real Estate, or you can demonstrate comparable intensity from another field
• High intrinsic motivation and strong entrepreneurial thinking with the ability to proactively drive your own projects, learn quickly, take responsibility for diverse tasks, and deal with ambiguity
• Strong analytical and conceptual skills to approach complex problems in a structured, direct, and solution-oriented manner and deliver high-quality results
• Excellent written and verbal communication and presentation skills with the ability to tailor messages to different target audiences, including customers, investors, suppliers, and partners
• Tech affinity (e.g., AI, IoT, SaaS) as well as interest or initial experience in real estate, PropTech, ClimateTech, or Energy is a plus
• Native level German (non-negotiable) as well as fluent English skills

Benefits

• Direct collaboration and daily mentoring by an experienced founder and an extremely steep learning curve
• Become part of a rapidly growing early-stage startup that is digitizing a huge market – with a lot of personal responsibility, high speed, and real scope for initiative
• The chance to make a real impact – on one of the largest, but often underestimated levers of the energy transition: With digital metering services, we are creating the basis for more efficient buildings and measurable CO₂ savings
• With very good performance, there is a clear option for permanent employment and the opportunity to help build Heidi long-term as one of the first 20 employees
• A high-performance team in a humorous and supportive culture, with regular team dinners and joint events
• A newly renovated old building office in Berlin Mitte directly at Monbijoupark, working together at one table, short distances, and direct decisions
• Access to a strong network in real estate, tech, energy, and venture capital

How your role can develop exemplarily

• Month 1: Onboarding into our core operational processes, taking over your first own customers and properties, while initiating your first strategic projects
• Month 2-3: Broader operational responsibility, independent initiatives – be it in Sales, Product, or Partnerships – your first processes or systems are live
• Month 4–12: Full ownership of larger operational areas – those who impress will receive a full-time offer and help build Heidi long-term as a permanent employee
• 12+ months: We recognize performance and reward it – those who have the maturity will take on initial team responsibility, grow into a leadership role, and actively shape Heidi

Depending on experience, entry as a Founder's Associate is possible in the form of an internship (3-12 months) or a permanent position. Start immediately or on a rolling basis.

We deliberately keep the process uncomplicated: CV + LinkedIn, no cover letter needed.

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