ELEKS Software Engineering & Development Office is looking for a Senior Full-Stack Software Developer (Java+React) based in Buenos Aires for a hybrid position: 2–3 days per week onsite at our local office, with the remaining days remote.Working hours 10:00 AM – 6:00/7:00 PM ARTABOUT PROJECTThe client is among the top-5 health insurance companies in the US. They are dedicated to expanding access to high-quality, cost-effective health care and equipping their members with information and tools so they can make the best health care decisions for themselves and their families.REQUIREMENTS5+ years of professional experience in Java backend developmentStrong proficiency in Java with hands-on experience in Spring Boot 3.xSolid experience designing and building REST APIs consumed by multiple downstream systemsSolid understanding of REST API design, authentication, authorization, and web security principlesHands-on experience with Databricks for data processing and data engineering workflowsWorking frontend development skills — React, TypeScript, CSS; ability to contribute to UI features alongside backend workExperience with ARO (Azure Red Hat OpenShift) or equivalent container orchestration platformsProficiency in CI/CD tooling — JenkinsProficiency in Git including branching workflows, code reviews, and pull requestsHands-on experience with GitHub Copilot or other AI-based coding assistantsHands-on experience with developer tooling: IntelliJ IDEA, VS Code, Git, Chrome Developer ToolsSolid communication and collaboration skills with ability to engage both technical and non-technical stakeholdersNICE TO HAVEExperience in the healthcare domain or regulated industry environmentsDeeper frontend experience with Redux, Webpack, and Microfrontend (MFE) architectureFamiliarity with MuleSoft or API integration platformsExperience with containerization (Docker, Kubernetes) and cloud platforms (AWS, Azure, GCP)Understanding of DevSecOps practices and GitOps workflowsKnowledge of code quality scanning tools such as SonarQubeWorking knowledge of Dynatrace for monitoring and observabilityBasic experience with NGINX and PCF/OpenShiftExperience working in agile delivery teams — comfortable with estimation, sprint planning, and JiraRESPONSIBILITIESDevelop backend functionality for the enterprise time-tracking platformImplement new features, enhancements, and integrationsOptimize data processing, API performance, and backend logicParticipate in refinement, planning, and technical discussionsCollaborate with PM, Designers, QAs, and senior developersInvestigate and troubleshoot production issues when neededEnsure code quality following engineering best practicesContribute to architectural decisions and propose improvementsWHAT YOU WILL GET WITH ELEKSClose cooperation with a customerChallenging tasksAbility to influence project technologiesTeam of professionalsDynamic environment with low level of bureaucracyELEKS is a custom software development company. We deliver value to our clients, thanks to our expertise and experience gained from working as a software innovation partner since ****.Our ****+ professionals located in the Delivery Centers across Eastern Europe and sales offices in Europe and North America, provide our clients with a full range of software engineering services. These include product development, QA, R&D;, design, technology consulting and dedicated teams. #J-*****-Ljbffr