About Antai Ventures
Antai Ventures is a Barcelona-based venture studio with presence across Southern Europe and LatAm. We partner-up and invest in the best co-founders to build general companies willing to disrupt multi-billion dollar industries. Since 2012 we have co-founded +30 companies including Glovo, Wallapop, PlatanoMelon, and Piper . Our ventures have raised more than $1.5B in funding, have generated more than $3B in shareholders value and currently employ more than 3000 people.
About the venture
We are building an AI-native platform for the real estate sector in Spain — one of the most fragmented, relationship-driven, and underdigitised industries in Southern Europe.
We have a validated product thesis, a clear go-to-market, and we're now looking for a co-founder & CTO to build it.
What you’ll do
- Build, launch and scale a disruptive product from scratch.
- Own the technical architecture — define the stack, set the engineering standards, and make the hard trade-offs between speed and scalability from day one.




- Design and implement a multi-agent orchestration layer — persistent state management, agent-to-agent handoffs, tool-calling pipelines, and context windows that don't collapse under real usage.
- Build and maintain LLM-powered workflows in production.
- Integrate third-party infrastructure (voice providers, CRMs, payment and signing APIs, document verification) into a coherent, maintainable system.
- Ship code daily — from prototype to production, you are hands-on throughout.
- Drive a culture of excellence through continuous delivery, rapid experimentation, and customer-obsessed iteration.

What We’re Looking For
- Proven track record as a hands-on engineer, tech lead, or CTO in an early-stage environment.
- Hands-on builder. You prototype fast and turn ideas into working features in days, not weeks.
- Practical AI experience. You have built production systems with LLMs — agent orchestration, multi-agent workflows, conversational AI — and know what a

📌 CTO & Co-Founder: AI-Driven PropTech Platform (España)
🏢 Antai Ventures
📍 España