? About Antai Ventures

Antai Ventures is a leading venture studio headquartered in Barcelona, with a strong presence across Southern Europe and Latin America. We team up with exceptional entrepreneurs to build disruptive, scalable companies from scratch. Since 2012, we've co-founded 30+ ventures, including Glovo, Wallapop, PlatanoMelon, and PiperAI. Collectively, our startups have raised over $1.5B in funding, generated $3B+ in shareholder value, and created 5,000+ jobs.

? The Opportunity

We are launching a new venture in the FinTech space, and we're looking for a Co-Founder & Chief Technology Officer (CTO) to lead product strategy and development from day one. This is a unique opportunity to co-build a company with us from the ground up, backed by the resources, expertise, and network of Antai Ventures.

?️ What You’ll Do

- Collaborate with the co-founders and executive team to define the product’s technical vision and roadmap, ensuring alignment with business strategy.

- Build and lead a world-class engineering team across backend, frontend, and data—fostering a cloud-native, continuous delivery mindset and ensuring professional growth.

- Architect a scalable, resilient, and secure technology platform with freedom to choose between monolith, microservices, serverless, and other modern patterns.

- Select the right technology stack for both backend and frontend applications, optimizing for speed, reliability, and scalability.

- Lead development with strong knowledge of software design principles, particularly Domain-Driven Design (DDD) and SOLID principles.

- Oversee the design and deployment of a robust data processing pipeline, managing ingestion, transformation, and storage for high-volume use cases.

- Champion engineering excellence, continuous improvement, and agile methodologies across the product lifecycle.





- Act as a tech-business bridge, communicating complex ideas clearly to non-technical stakeholders and collaborating closely with the CEO and executive team.

- Foster a culture of curiosity, ownership, and proactive problem-solving across the tech team.

? What We’re Looking For

- 8+ years of experience as a Software Engineer, ideally in backend technologies (Java/Spring or PHP/Symfony preferred).

- Proven leadership experience as a Tech Lead or CTO in a startup or fast-growing digital company.

- Strong grasp of Cloud Native environments: Docker, Kubernetes, microservices, service mesh, infrastructure-as-code.

- Expertise in designing and scaling data architectures, including pipelines for stream/batch processing and data warehousing.

- Deep understanding of software architecture, testing, design patterns, and team workflows in agile development environments.

- Track record of hiring, mentoring, and scaling high-performing engineering teams.

- Entrepreneurial mindset and hands-on, get-it-done approach.

- Excellent communication and interpersonal skills—able to translate tech into business.

- Fluency in both English and Spanish.

- Bonus: Experience in FinTech or similar regulated markets and building AI-first digital products.

? What We Offer

- A unique opportunity to co-found a startup with a de-risked path and the backing of a successful venture studio.

- Access to Antai’s full operator team across Product, Engineering, Design, Legal, Talent, GTM, Fundraising, and more.

- Strong equity stake in the company and the opportunity to get equity in other start-ups in our portfolio.

- Being part of Antai’s ecosystem of serial entrepreneurs and top-tier investors.

- Office space in Barcelona, Madrid, and Mexico City.

? Ready to Build?
If you're a tech-driven entrepreneur ready to build the next big thing in FinTech, let’s talk.

📌 Co-Founder & CTO - FinTech (Barcelona)
🏢 Empresa líder
📍 Barcelona