Senior Backend Engineer - Barcelona

Join Yakeey, a fast-growing PropTech company, as a Senior Backend Engineer. You will be responsible for developing and maintaining micro-services in your assigned domain, designing and exposing APIs, ensuring alignment with global architecture, collaborating with adjacent teams, and implementing best practices for code quality, testing, security, and observability. You will also mentor junior developers and participate in architectural discussions.

• Développer et maintenir des micro-services dans votre domaine assigné en utilisant Java/Spring Boot, en suivant la conception pilotée par le domaine et nos normes architecturales établies.
• Concevoir et exposer des API qui intègrent les services de votre domaine avec d'autres composants de la plateforme, permettant une interopérabilité transparente.
• Collaborer avec des équipes adjacentes (front-end, données, DevOps, IA) pour comprendre les dépendances et garantir que les solutions dans votre domaine s'intègrent parfaitement à leurs composants.
• **Curiosity for next‑generation AI technologies** – Demonstrated interest in or experience with intelligent agents, large language models (LLMs), Model Context Protocol (MCP) and retrieval‑augmented generation (RAG) architectures. A “geek” mindset that enjoys exploring and experimenting with emerging AI tools and applying them in practical scenarios.
• Solid experience building backend systems, with deep expertise in Java and Spring Boot.
• Solid understanding of micro‑services architecture, RESTful API design and domain‑driven design; experience with event‑driven patterns is a plus.
• Experience deploying applications on cloud platforms (AWS) and familiarity with container orchestration (Kubernetes) and infrastructure‑as‑code (Terraform).
• Broad knowledge of front‑end frameworks (React/Next.js)
• Strong problem‑solving skills, attention to detail and commitment to delivering quality software.
• Excellent communication skills and ability to collaborate effectively with other domain teams.
• Familiarity with fintech, proptech or similar regulated domains is beneficial; proficiency in French or Arabic is a plus.