Programador Fullstack Backend O Frontend

learn fast. We Are Data-Driven Data informs our decisions and helps us continuously improve our systems and results. Frontend: Typescript, React, Styled Components / Design Systems. Backend (Where you’ll grow): Node.js, Go, Microservices. The Ad Serving Mindset: You understand that “Frontend” in Adtech means building small, highly-optimized scripts that run on other people’s websites without breaking them. The Fullstack “Predisposition”: You aren’t just a UI developer. You have a strong interest in the backend (Node.js). You view the server as the natural extension of the client. SaaS & Design Systems: You have experience building complex B2B platforms where consistency, reusability, and performance are paramount. Software Craftsmanship: You advocate for Clean Code and SOLID principles. You believe that “done” includes being well-tested, documented, and observable. You see the backend as an opportunity to broaden your impact rather than a chore. AI-Augmented Productivity: You embrace

AI tools (GitHub Copilot, Claude code, LLMs, etc.) You understand how to leverage these tools to speed up boilerplate coding, debugging, and learning, allowing you to focus on high-level architecture and complex problem-solving. A key moment of growth with real ownership and global impact. ~ Flexible work model with 100% remote or hybrid options. ~(Remote contracts available in Spain, Italy, UK, Belgium, Netherlands, France, and Germany.) ~ Home office setup budget up to €1,000 ~

We’re looking for a Fullstack Engineer - Ad Serving AdExchange to join our tech team and help build the future of neuro-contextual advertising at global scale. At Seedtag, our mission is to transform advertising by proving that effectiveness and user privacy can truly coexist. As the leading Neuro-Contextual Advertising Company, we combine Artificial Intelligence, Natural Language Processing, Computer Vision, and neuroscience to understand not only what content is about, but how it makes people feel and what they intend to do next. If you enjoy solving complex engineering challenges and building AI-driven systems at scale, you’ll feel right at home here. Lead the evolution of our Curation tools using a robust, scalable Design System to ensure a top-tier UX. Fullstack Ownership: Work closely with backend engineers to contribute to the Node.js services. We value your frontend expertise here to ensure our APIs are as developer-friendly as they are fast. We test early, iterate often, and