We are looking for a Senior Java Developer with strong backend expertise to join our friendly, professional team working on a project for a global fintech company. This is a remote position based in Argentina, offering a versátil and supportive work environment. **Key Requirements**: - 5+ years of experience with Java - Proven experience with Java 8+ and deep hands-on knowledge of Java Streams and lambda expressions - Strong automation experience is essential - Solid background in Spring Boot and RESTful API development - Extensive experience with microservices architecture and related resilience patterns (e.g., Resilience4j) - Expertise in secure communication protocols such as TLS and mTLS, including keystore/truststore configuration - Familiarity with CI/CD, logging, monitoring, and deploying Java services in production - **Experience writing clean, testable code with unit and integration testing frameworks (JUnit, Mockito**) - Excellent debugging and problem-solving skills **Primary Responsibilities**: - Design, develop, and maintain scalable backend services using Java 8+ and Spring Boot - Build and maintain RESTful APIs following best practices and standards - Architect and implement microservices, ensuring system resilience and fault tolerance - Utilize Java Streams for complex data processing tasks - Implement error handling and fallback strategies to improve system robustness - Ensure secure data exchange through proper use of TLS/mTLS protocols - Conduct code reviews, share knowledge, and mentor junior developers - Collaborate across teams to deliver high-quality, production-ready features - Proactively manage technical debt and uphold engineering best practices **What We Offer**: - Fully remote work opportunity based in Argentina - Benefits package (Paid vacation, sick leave) - Contract duration: 6+ months with potential for long-term engagement - A friendly and professional team environment that encourages growth and collaboration