Job Summary: We are seeking a technical Junior/Senior Backend QA profile to specialize in transactional messaging, with experience in API and database testing. Key Highlights: 1. Junior/Senior Backend QA role with growth potential 2. Specialization in transactional messaging 3. Promotion of an inclusive and diverse environment We are Ecosistemas Global, a technology company that connects our clients with tailored, comprehensive, and innovative solutions. We operate in more than 15 countries, including Argentina, Chile, Brazil, Mexico, the United States, and Spain. With 30 years of experience and a multidisciplinary team of over 500 professionals, we are driven by our commitment to grow every project and client we work with. We want you to be part of this great team! · What are we looking for? A candidate with a solid technical background, oriented toward Junior/Senior Backend QA, with growth potential and enthusiasm to specialize in transactional messaging. Work Location: CABA Work Modality: Hybrid Working Hours: Monday to Friday, 9:00 AM to 6:00 PM Mandatory Requirements: Advanced student or graduate in Computer Science or related field Previous experience or knowledge in backend testing (APIs, data validation, service testing, etc.) Knowledge of binary data handling and hexadecimal format Advanced Excel proficiency SQL knowledge Desirable Knowledge: Basic understanding of message structures under ISO standards (ideally ISO 8583) Understanding of transaction processing and financial messaging Ability to interpret technical logs and analyze low-level information Additional Valued Attributes: Interest in developing expertise in payment methods and transactional systems Basic knowledge of networks and communication protocols Experience or familiarity with API testing, file processing, and data analysis At Ecosistemas Global, we believe diversity enriches our culture and perspectives; therefore, we actively foster an inclusive environment where each individual—regardless of origin, gender, orientation, abilities, or beliefs—is not only welcome but also essential to our success. We value and respect all voices, and we invite you to join our team, where inclusion is a fundamental pillar of our values.-Requirements- Minimum Education: Tertiary years of experience Keywords: calidad, quality, qa