More in details, UST is a multinational company based in North America, certified as a Top Employer and Great Place to Work company with over 35.000 employees all over the world and presence in more than 35 countries. We are leaders on digital technology services, and we provide large-scale technologic solutions to big companies.We are looking for a Senior Java Engineer specializing in Microservices and AWS to join a project for a global leader in credit cards, auto loans, banking, and savings accounts. This 100% remote position is open to candidates located in Spain, requiring fluent English for effective collaboration with international teams.Design, develop, and sustain efficient, reusable, and high-quality software.Optimize application performance, quality, and responsiveness.Engage in the full Software Development Life Cycle (SDLC), including occasional QA and peer code reviews.Very strong Java programming skills and knowledge of building API'sDeep understanding of all stages in the Software Development Life CycleExperience with different testing types: Unit Testing, API Testing, Acceptance Testing, Load TestingRelevant experience with AWS servicesExperience with Gradle or MavenExperience with Enterprise JenkinsExperience working in an Agile fashion (e.g. Scrum, SAFe)English B2+/C1Numerous benefits (Health Care Plan, teleworking compensation, Life and Accident Insurances).`Retribución Flexible ́ Program: (Meals, Kinder Garden, Transport, online English lessons, Health Care Plan...)Free access to several training platformsReal Work Life Balance measures (flexibility, WFH or remote work policy, compacted hours during summertime...)