Senior Java Developer

Hi there :) Thanks for checking in to find out about our open position. We´ll provide as much information as possible, but please feel free to reach us if you have further questions. We´ll be happy to see your application, even if there are skills you don't quite master! About Us At South Geeks, we connect top-performing engineers from Latin America with global organizations building meaningful, long-term products. We focus on high-impact work, strong technical environments, and creating spaces where professionals can grow, contribute, and thrive. About the Client Our client is a global nonprofit technology organization dedicated to helping people discover, preserve, and connect family history data. They operate large-scale, cloud-based platforms used by millions worldwide, where data accuracy, integrity, and reliability are critical to the mission. About the Role We are seeking a Senior Software Engineer (Java) who combines strong backend engineering skills with a deep interest in data quality and large-scale data correction. This is a highly technical position focused on investigating data issues, debugging complex systems, and writing substantial Java code to repair and improve massive datasets. You’ll work in an iterative, fast-moving environment, diagnosing issues across distributed systems, building safe and repeatable repair workflows, and ensuring data correctness across millions of records. Key Responsibilities • Investigate, diagnose, and resolve data-quality issues in large-scale backend systems. • Design and implement Java-based repair and correction pipelines for high-volume datasets. • Debug and fix issues in existing Java codebases supporting distributed systems. • Build safe, idempotent jobs to correct data without introducing regressions. • Leverage AWS services (such as S3, SQS, and Lambda) to support queue-driven and batch workflows. • Analyze system behavior related to performance, concurrency, and memory usage. • Clearly communicate findings, risks, and recommendations to technical and non-technical stakeholders. Required Skills & Experience • 6+ years of professional experience developing Java in large-scale backend systems. • Strong debugging, triage, and data analysis skills. • Experience working with distributed systems and high-volume processing pipelines. • Hands-on experience with AWS, including services such as S3, SQS, and Lambda. • Solid understanding of performance optimization, concurrency, and memory-efficient design patterns. • Ability to design reliable, repeatable data repair workflows. • Comfort operating in ambiguous, evolving problem spaces and deriving practical solutions. • Strong communication skills, with the ability to summarize complex technical findings clearly. Nice to Have • Experience working with genealogical, historical, or highly interrelated datasets. • Familiarity with queue-driven architectures and event-based processing. • Experience improving data integrity in legacy or long-lived systems. Our Team We strive to create an inspiring and growth-oriented environment where everyone feels valued, heard, and empowered. We promote both personal and professional development, with individualized support for your needs and goals. We aim to build a space where everyone can thrive. What We Offer • Long-term projects • 100% remote work • Payment in USD • Paid Time Off (PTO) • Work-from-home & training reimbursement • English lessons • Technical training • Career coaching