Founding Engineer for PropTech startup

Stellenbeschreibung:

Founding Engineer – PropTech Startup vivanta (Firstlane Capital)

We are Sebastian Seifert , Andreas Veller , and Achim Bönsch – 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. For our portfolio company, vivanta , we are 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.

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
Build a scalable, modular platform architecture that integrates ERP, CRM, document management, and digital owner portals. Strong focus on security, scalability, and maintainability
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

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
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 : Be one of the first engineers and shape our Tech DNA from day one
Ownership & Design Freedom : Define architecture, stack, standards – determine together with founders
Close Collaboration with founders and investors
Flexible Working : Office in Berlin + remote possible
Equity Options : Become a long‑term shareholder in vivanta

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

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

Start date : January 2026