Senior Java Developer

South Geeks LLC; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

100% remote work

Payment in USD

PTO

Work-from-home & training reimburse

English lessons

Technical training

Career coaching

Job summary

South Geeks LLC is seeking a Senior Software Engineer (Java) to tackle data quality at scale. You will investigate issues, debug complex systems, and write substantial Java code to repair and improve massive datasets.

You’ll work in an iterative, fast-moving environment, building safe repair workflows and ensuring data correctness across millions of records, using AWS services like S3, SQS, and Lambda.

Qualifications

• 6+ years of professional Java backend development.
• Strong debugging, triage, and data analysis skills.
• Experience with distributed systems and high-volume processing.
• Hands-on AWS experience with S3, SQS, and Lambda.
• Solid understanding of performance optimization, concurrency, and memory-efficient design.
• Ability to design reliable, repeatable data repair workflows.
• Clear communication of findings and risks to technical and non-technical stakeholders.

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.

Skills

Java backend

Debugging & triage

Distributed systems

AWS

Performance optimization

Data repair workflows

Communication skills

Tools

S3

SQS

Lambda

Job description

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