Founder's Associate (Mandatory Internship)

Berlin based | German native speaker | Mandatory Internship | 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 major 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. This is how we create the foundation 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 as well as directors from Google and OpenAI.

As a Founder's Associate, you will work directly with our founder Paul. You will sit at our table, 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 and on-site customer and partner meetings
• You will keep track of everything – know at all times what is where, 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 see them through to completion 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 improvement suggestions

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 see tasks through 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 Business Administration, 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, 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 handle 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 fast-growing early-stage startup that is digitizing a huge market – with a lot of personal responsibility, high speed, and genuine scope for initiative
• The chance to make a real impact – on one of the biggest, 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 takeover 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 on 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 as an example

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

Start date: ASAP.

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

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