Senior Backend Engineer (Java)

TL;DR

Senior Backend Engineer (Java): Design and develop scalable backend services using Java and Spring Boot with an accent on REST API architecture, persistence layer optimization, and clean architecture principles. Focus on applying software design patterns, identifying technical debt, and contributing to architectural decision-making and code quality initiatives.

Location: Not specified; Smart Office Pack for comfortable work from home available. Fluent proficiency in English and Spanish required.

Company

International advisory group specializing in innovation and transformation through technology, with 5,000 employees and 600M€ turnover.

What you will do

• Design and develop scalable backend services using Java and Spring Boot (3/4).
• Build and maintain REST APIs following an API-first approach with OpenAPI.
• Apply clean architecture principles and software design patterns for maintainable systems.
• Improve and optimize the persistence layer using Hibernate/JPA.
• Identify technical debt and propose sustainable solutions.
• Promote engineering best practices, code quality, and collaborate with frontend and cross-functional teams.
• Contribute to architectural discussions and technical decision-making.

Requirements

• 5+ years of experience developing backend applications with Java
• Strong experience with Spring Boot 3 or higher
• Solid understanding of software design patterns and engineering best practices
• Hands-on experience with Hibernate/JPA and data modeling
• Experience designing REST APIs using OpenAPI and API-first methodologies
• Fluent proficiency in English
• Fluent proficiency in Spanish
• Proactive mindset to challenge ideas constructively

Nice to have

• Experience in distributed systems or microservices
• Familiarity with CI/CD pipelines and cloud environments
• Experience in architectural modernization initiatives

Culture & Benefits

• Full-time contract with Smart Office Pack for home office.
• Training and career development opportunities.
• Flexible remuneration package including private medical insurance, life insurance, lunch and travel cards.
• Multicultural team and international projects.
• Possibility to manage work-permits.