Job Summary: We are looking for a Mid-Level Back-End Developer passionate about innovation and technology to build robust, scalable, and efficient systems, contributing to the architecture and performance of innovative products. Key Highlights: 1. Dynamic and relaxed environment, GPTW certified and passionate about people 2. Develop and maintain Back-End user interfaces using modern technologies 3. Participate in the full software development lifecycle, from inception to delivery **Who We Are?** The Youx Group is continuously growing—and to support this growth, we need the best talent! We’re seeking professionals who are passionate about Innovation and Technology and who strive to deliver innovative, agile, and practical solutions for our clients. Oh, and you must love being surrounded by amazing people in a dynamic and relaxed environment—after all, we’re GPTW certified and deeply passionate about people! **Want to become a Youxer?** Pay attention—this position is **PJ (freelance) and Remote!** **What Will You Do?** We’re looking for a **Mid-Level Back-End Developer** to join our team! If you’re passionate about building robust, scalable, and efficient systems, and have solid back-end development experience, this role is for you! You’ll be challenged to translate complex requirements into innovative technical solutions, directly contributing to the architecture and performance of our products. * Develop and maintain user interfaces using the latest Back-End technologies; * Optimize applications to ensure maximum speed and scalability; * Actively participate in the full software development lifecycle—from conception through deployment; * Contribute to continuous improvement of our development processes and standards. **Requirements:** * Minimum of 3 years of professional development experience; * Experience with Java 21 or later; * Development of applications using Spring Boot, including modules: Web, Data JPA, Validation, and Security (basic level); * Creation and consumption of REST / RESTful APIs; * Integration with relational databases, with focus on PostgreSQL; * Intermediate SQL knowledge, including joins, indexes, views, and basic performance analysis; * Experience with JPA / Hibernate, covering mappings, fetch types (lazy/eager), and identification of issues such as N+1; * Application of SOLID principles and Clean Code best practices; * Knowledge of architectures such as Clean Architecture, Hexagonal Architecture, or Layered Architecture; * Creation and consumption of external APIs (REST); * Implementation of error handling using Exception Handlers and appropriate HTTP status codes; * Use of Git for source code versioning, following workflows such as GitFlow or similar; * Writing unit tests using JUnit and Mockito; * Knowledge of DTOs and Mappers, using MapStruct or manual mapping. **What Does YouX Expect From You?** * Autonomous work, with responsibility and effective management of your deliverables; * Strong ability to read, understand, and evolve legacy code; * Clear and collaborative communication with backend and frontend teams; * Active participation in code reviews, providing constructive feedback; * Familiarity with agile methodologies such as Scrum and/or Kanban; * Ability to understand business rules and translate them into technical solutions; * Skill in accurately estimating medium-complexity tasks. **Why Join Us?** At YouX, you’ll have the opportunity to work on challenging projects that directly impact our clients. We offer a dynamic work environment with continuous professional development opportunities, mentoring, and a team that values collaboration and knowledge sharing. If you’re looking for a place where your talent is recognized and where you can truly make a difference, come build the future with us! **We Value Your Well-being at YouX!** * Health care: Medical plan, dental plan, telemedicine, and life insurance; * Supplementary pension plan; * Flash personalized multi-benefits: VA and VR to support your meals; * Rest is essential: Paid time off; * Celebrate your day: Birthday day off! * Stay active! We offer Gympass to facilitate your healthy routine; * Mobility allowance: Support for your commutes, making your daily routine more convenient; * Quality of life at YouX: Workplace gymnastics and healthy foods that must never be missing from your day; * We value development: Training and upskilling program—the X Academy; * Begin your journey of self-awareness: Profiler and behavioral mapping. **Selection Process Steps:** * Screening; * Automated questions; * Behavioral interview; * Practical test; * Manager panel interview; * Cultural fit committee review; * Offer. **COME BE THE X WE’VE BEEN MISSING!**