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# Senior/Staff Software Engineer (Communications)

- **Company:** Factorial Hr
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Software Engineering, ReactJS, Large Language Models, Multi-Agent Systems, Backend, React Native
- **Published:** August 9, 2026
- **Apply:** https://www.buscojobs.com.es/senior-staff-software-engineer-communications-en-barcelona-ID-366782830

## About the Role

* Fullstack experience (Rails/React/React Native) or deep React Native expertise
 * Experience with real AI- or agent-powered xqbhyrx systems
 * Solid software engineering background with end-to-end ownership
 * Strong English communication in a multicultural team
 * Bonus: experience with LLMs, agent frameworks, MCP or similar AI protocols

## Description

Experteer OverviewEnvíe su CV y cualquier información adicional requerida después de haber leído esta descripción, haciendo clic en el botón de solicitud.In this role you'll help launch Chats, an AI-native product built from the ground up.You'll shape core architecture and end-to-end delivery, working with a small, high-ambition team in a startup-like environment.You'll partner with product and design to translate customer feedback into real features, aiming to create a seamless, agent-powered experience at scale.This is a hands-on role with impact across stack and product culture, offering a rare chance to redefine how software is built with AI from day one.Compensaciones / Beneficios* Build Chats from zero, making critical architecture decisions and delivering features used by customers* Design and ship experiences where AI and agents are central, not add-ons* Work across the stack (Rails on backend, React on web, React Native on mobile)* Adapt priorities and scope rapidly as learning happens* Collaborate closely with product and design to shape Chats based on user feedback* Help define team practices, quality bar, and day-to-day working normsResponsabilidades* Built products in high-ambiguity environments from zero to launch* Comfort with shifting priorities and incomplete requirements* Fullstack experience (Rails/React/React Native) or deep React Native expertise* Experience with real AI- or agent-powered xqbhyrx systems* Solid software engineering background with end-to-end ownership* Strong English communication in a multicultural team* Bonus: experience with LLMs, agent frameworks, MCP or similar AI protocolsRequisitos principales* Private health insurance* Wellhub gym access* Cobee expense management* Language classes* Breakfast in the office and organic fruit* Food discounts with Nora (and more)


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