Senior Backend Engineer

TL;DR

Senior Backend Engineer (Java/Spring): Building and evolving high-performance backend services for a cloud-native hospitality platform with an accent on multi-tenancy, scalability, and AI-native capabilities. Focus on designing resilient distributed systems, AI-ready data models, and high-availability workflows under heavy operational demand.

Barcelona CT, Spain

Company

We are building the next generation of cloud-native software for the hospitality industry, powering complex multi-tenant environments with high-demand operational workflows at scale, now evolving toward AI-native capabilities.

What you will do

• Design and implement scalable backend services using Java, Spring Boot, Spring Security, Spring Batch, and Hibernate.
• Architect RESTful APIs and event-driven integrations (REST, SOAP, gRPC, messaging systems).
• Optimize relational data models (SQL Server, PostgreSQL) for performance and maintainability.
• Deploy and operate Dockerized services on AWS with resilience, observability (ELK), and monitoring.
• Build secure, high-performance, multi-tenant solutions and own full lifecycle from design to production optimization.
• Collaborate with product, frontend (Angular/TypeScript), and DevOps teams for continuous delivery.

Requirements

• 5+ years of experience building production-grade backend systems.
• Deep expertise in Java and Spring Boot.
• Strong experience with relational databases and performance tuning.
• Proven experience designing RESTful APIs and distributed systems.
• Solid understanding of cloud-native architectures and containerized workloads.
• Experience in high-availability, high-throughput environments.
• Professional Spanish and English level.

Nice to have

• Experience with Kubernetes and advanced CI/CD pipelines.
• Test-Driven Development (JUnit, Mockito).
• Experience integrating AI-driven workflows or designing systems for ML/AI.
• Familiarity with frontend frameworks (Angular, React).
• Experience with observability platforms and performance monitoring.
• Exposure to Domain-Driven Design (DDD) and event-driven architectures.

Culture & Benefits

• High-impact role with real architectural ownership.
• Collaborative, product-focused engineering culture emphasizing ownership and continuous delivery.
• International and cross-functional environment.
• Continuous learning and technical growth opportunities.
• Pragmatic innovation in a product-driven, engineering-first organization.