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CTO – Co-Founder, Proptech
Antai VenturesCTO & Co-Founder responsible for building an AI-native real estate platform. Join Antai Ventures in disrupting the real estate sector in Spain.
About the role
Key responsibilities & impact- 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.
Requirements
What you’ll need- 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 actually works outside a demo.
- Architectural thinking. You design systems that are simple enough to ship fast today and solid enough to scale tomorrow.
- Ownership mindset. You take responsibility for outcomes and think long-term about product and company value.
- Clear communicator. You can explain technical trade-offs to engineers and non-technical co-founders alike.
- Fluency in Spanish and English.
Benefits
Comp & perks- Day-1 founding seat. Join an ambitious venture from the ground up, with a validated concept and Antai's full backing.
- Significant equity. Own a meaningful stake in the venture, plus optional carry in other Antai portfolio companies.
- Full-stack operator support. Access Antai's expert teams in Product, Engineering, Design, GTM, Legal, Talent, and Fundraising whenever you need them.
- Founder community and investors. Join a tight network of serial entrepreneurs and top-tier backers who have scaled category leaders.
- Based in Barcelona, hybrid.
ATS Keywords
✓ Tailor your resumeApplicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard Skills & Tools
multi-agent orchestrationpersistent state managementagent-to-agent handoffstool-calling pipelinesLLM-powered workflowsproduction systemsconversational AIarchitectural designrapid prototypingcontinuous delivery
Soft Skills
ownership mindsetclear communicationcustomer-obsessed iterationtechnical trade-off explanationteam leadershipproblem-solvingadaptabilitycollaborationinnovationresponsibility