Founding Engineer for PropTech startup

We are **Sebastian Seifert**, **Andreas Veller**, and **Achim Bönsch** – all graduates of the WHU Bachelor Class of 2011. After 13 successful years building the fintech company viafintech and ultimately selling it in one of Germany’s largest fintech exits for a nine-figure amount, we are now pursuing new challenges:

We found new ventures and invest in startups and venture capital funds.

For one of our portfolio companies, **the PropTech startup vivanta,** we are now looking for a **Founding Engineer** who is excited to shape the technical foundation from day one and take on a key long-term role in the company.

**About vivanta**

With vivanta, we are building an AI-powered property management company, transforming a centuries-old €20 billion market in Germany.

• **High demand in a fully fragmented market**
• **10+ year customer retention**
• **Strong monthly recurring revenue potential**
• **A massive playground for technological innovation**

Positioned at the intersection of strong unit economics and exceptional technical execution, we are creating a product that is both indispensable and designed for long-term market adoption.

Tasks

We’re looking for a **Founding Engineer** who’s excited about shaping a company from the ground up - not just writing code, but defining the technical foundation of our product and business.

You will:

• Design and implementation of **end-to-end automations** in areas such as accounting, invoice approval, communication, and property management – including monitoring, logging, and error handling
• **Building a scalable, modular platform architecture** that integrates ERP, CRM, document management, and digital owner portals. Strong focus on security, scalability, and maintainabilit
• Develop production-ready **LLM** and **ML features** (e.g., document classification, predictive maintenance, AI assistants), including prompt engineering, fine-tuning, and deployment
• Closely collaborate with the founders – **you decide on architecture, tools, frameworks, and set technical standards** (clean code, testing, code reviews, DevOps processes)

Requirements

We’re looking for someone who:

• Has **deep experience with backend systems**, infrastructure, and API design
• Thrives in early-stage environments where **speed and adaptability** are key
• Enjoys solving **complex technical challenges** with an eye toward scalability and maintainability
• Is comfortable working in-person with the founding team (not full-time remote)
• Wants to take **ownership**—both in equity and in decision-making

Benefits

• **Founder-Level-Impact:** Du bist einer der ersten Engineers und prägst unsere Tech-DNA von Anfang an
• **Ownership & Gestaltungsspielraum:** Architektur, Stack, Standards – du bestimmst mit
• **Enge Zusammenarbeit** mit Gründer:innen und Investor:innen
• **Flexibles Arbeiten:** Büro in Berlin + Remote möglich
• **Equity-Optionen**: Werde langfristig Teilhaber:in am Erfolg von vivanta

**Compensation:** €60–80k salary + equity (pre-seed)

**Location:** Berlin, Munich, Hamburg, Germany (on-site preferred, with flexibility)

**Start date:** Januar 2026

We are **Sebastian Seifert**, **Andreas Veller**, and **Achim Bönsch** – all graduates of the WHU Bachelor Class of 2011. After 13 successful years building the fintech company viafintech and ultimately selling it in one of Germany’s largest fintech exits for a nine-figure amount, we are now pursuing new challenges:

We found new ventures and invest in startups and venture capital funds.

For one of our portfolio companies, **the PropTech startup vivanta,** we are now looking for a **Founding Engineer** who is excited to shape the technical foundation from day one and take on a key long-term role in the company.

**About vivanta**

With vivanta, we are building an AI-powered property management company, transforming a centuries-old €20 billion market in Germany.

• **High demand in a fully fragmented market**
• **10+ year customer retention**
• **Strong monthly recurring revenue potential**
• **A massive playground for technological innovation**

Positioned at the intersection of strong unit economics and exceptional technical execution, we are creating a product that is both indispensable and designed for long-term market adoption.

Tasks

We’re looking for a **Founding Engineer** who’s excited about shaping a company from the ground up - not just writing code, but defining the technical foundation of our product and business.

You will:

• Design and implementation of **end-to-end automations** in areas such as accounting, invoice approval, communication, and property management – including monitoring, logging, and error handling
• **Building a scalable, modular platform architecture** that integrates ERP, CRM, document management, and digital owner portals. Strong focus on security, scalability, and maintainabilit
• Develop production-ready **LLM** and **ML features** (e.g., document classification, predictive maintenance, AI assistants), including prompt engineering, fine-tuning, and deployment
• Closely collaborate with the founders – **you decide on architecture, tools, frameworks, and set technical standards** (clean code, testing, code reviews, DevOps processes)

Requirements

We’re looking for someone who:

• Has **deep experience with backend systems**, infrastructure, and API design
• Thrives in early-stage environments where **speed and adaptability** are key
• Enjoys solving **complex technical challenges** with an eye toward scalability and maintainability
• Is comfortable working in-person with the founding team (not full-time remote)
• Wants to take **ownership**—both in equity and in decision-making

Benefits

• **Founder-Level-Impact:** Du bist einer der ersten Engineers und prägst unsere Tech-DNA von Anfang an
• **Ownership & Gestaltungsspielraum:** Architektur, Stack, Standards – du bestimmst mit
• **Enge Zusammenarbeit** mit Gründer:innen und Investor:innen
• **Flexibles Arbeiten:** Büro in Berlin + Remote möglich
• **Equity-Optionen**: Werde langfristig Teilhaber:in am Erfolg von vivanta

**Compensation:** €60–80k salary + equity (pre-seed)

**Location:** Berlin, Munich, Hamburg, Germany (on-site preferred, with flexibility)

**Start date:** Januar 2026