Senior Full Stack Engineer | Java + Spring Boot + React + Kafka | Remote Mexico

100% Remote – Mexico | 12-Month - Contractor RoleAmerican IT Sourcing (AITS) is looking for Mid-Senior / Senior Full Stack Software Engineers based in Mexico for a long-term remote engagement supporting a major global financial-services organization.We are specifically looking for engineers with strong, recent hands-on experience across both backend and frontend development.Required experience:5+ years of professional software engineering experienceStrong JavaStrong hands-on Spring BootReact + TypeScript / JavaScriptApache KafkaREST APIsAWSPostgreSQL and/or OracleSQL / stored proceduresAutomated testing: JUnit, Jest, React Testing Library, Cypress or similarMicroservices / cloud-native developmentStrong English communication skillsExperience working with international or US-based teamsHighly desirable:Banking, fintech, payments or financial-services experienceOracle / PL-SQLRedux / Context APIDocker / KubernetesCI/CDHigh-volume transactional systemsImportant: This is a true Java Full Stack role. Recent, production-level experience with Java + Spring Boot + React + Kafka is essential.Engagement details:100% remote within MexicoIndependent contractorInitial 12-month engagement with possibility of extensionCompetitive compensation based on experienceTechnical assessment followed by interviewsImmediate requirementIf you are currently based in Mexico and have strong recent experience with Java, Spring Boot, React and Kafka, please apply or send me a message.