Senior Full-Stack Software Developer (Java+React)Argentina, Buenos AiresSoftware Engineering, React, Java.

Eleks • Buenos Aires, Buenos Aires • Posted June 03, 2026

Position Overview

ELEKS 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 ART


ABOUT PROJECT


The 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.


REQUIREMENTS

  • 5+ years of professional experience in Java backend development

  • Strong proficiency in Java with hands-on experience in Spring Boot 3.x

  • Solid experience designing and building REST APIs consumed by multiple downstream systems

  • Solid understanding of REST API design, authentication, authorization, and web security principles