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# CTO & Co-Founder

- **Company:** Quantica GmbH
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Continuous Delivery, Large Language Models, Multi-Agent Systems
- **Published:** September 24, 2026
- **Apply:** https://www.adzuna.es/contact-us.html

## About the Role

+ 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.

## Description

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.


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- [Designing and Deploying Distributed Multimodal Multi-Agent Systems with Google's AI Stac](https://www.wearedevelopers.com/videos/1976-designing-and-deploying-distributed-multimodal-multi-agent-systems-with-google-s-ai-stac)
- [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform)
- [Bringing the power of AI to your application.](https://www.wearedevelopers.com/videos/1010-bringing-the-power-of-ai-to-your-application)
- [Lies, Damned Lies and Large Language Models](https://www.wearedevelopers.com/videos/1231-lies-damned-lies-and-large-language-models)

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