We are looking for a highly skilled Senior Java Developer with advanced English proficiency and extensive experience working with Big Systems and SaaS (Software as a Service) platforms. The ideal candidate will be responsible for designing, developing, and optimizing large-scale software solutions, ensuring robust system performance, and working closely with cross-functional teams to deliver high-quality products. This role requires deep expertise in Java and familiarity with modern system architecture.Key Responsibilities:Develop, test, and maintain scalable Java applications with a focus on SaaS environments.Work with large system architectures to ensure performance, scalability, and security.Optimize and refactor existing code to ensure system efficiency and future scalability.Participate in the entire application lifecycle, from concept and design to testing and deployment.Troubleshoot and resolve issues, ensuring smooth performance in production environments.Requirements:5+ years of experience in Java development, preferably in large-scale or SaaS environments.Expertise in Java 8+, Spring Boot, and RESTful API development.Experience working with large system architectures and ensuring their performance and reliability.Familiarity with cloud-based platforms (AWS, Azure) is a strong plus.Proficiency in English—both written and spoken—at an advanced level.Benefits:Payment Scheme: 100% PayrollStatutory Benefits: Social SecurityChristmas Bonus: 15 days per year workedVacation: 12 days annuallyVacation Bonus: 25%Life Insurance SGMM (Major Medical Expense Insurance)Fondo de Ahorro (Savings Fund)Hybrid Scheme: 3 days in the office, 2 days remoteJob Type: Full-timeSalary: $40,000.00 - $90,000.00 per monthExperience:SaaS: 1 year (Desirable)Spring: 1 year (Desirable)Java: 4 years (Desirable)Language:English (Desirable)Location: Hybrid remote in 11000, Mexico City, CDMX#J-18808-Ljbffr