Senior Java Big Data Developer (AWS)

About the Role We are seeking an experienced Senior Java Big Data Developer to join our Enterprise Transparency Services team. In this role, you will design and develop scalable, cloud-native data solutions that enable business intelligence teams and data analysts to derive meaningful insights from large and complex datasets. You will play a key role in building and optimizing data ingestion, transformation, validation, and dissemination pipelines using modern Java, AWS, and Big Data technologies. Key Responsibilities • Analyze and translate complex business requirements into scalable and efficient technical solutions using Core Java (JDK 17+) • Design, develop, and maintain robust ETL/data pipelines leveraging AWS cloud and serverless technologies • Build scalable and high-performance data processing solutions to support enterprise data platforms • Develop and maintain REST APIs and supporting backend services • Implement comprehensive automated testing strategies, including: • Unit testing using JUnit, Mockito, or similar frameworks • Functional/API testing using Playwright or comparable tools • Performance testing using Gatling or equivalent frameworks • Optimize application and data pipeline performance, including multithreading, concurrency, and memory management • Participate in and lead code reviews and design review sessions, ensuring adherence to engineering best practices and architectural standards • Collaborate with DevOps and engineering teams to support CI/CD pipelines, deployment, and release processes • Provide technical expertise and support for production troubleshooting, incident resolution, and system maintenance Required Qualifications • 5+ years of hands-on experience in Java development • 3+ years of experience working on Big Data and AWS-based projects • 3+ years of experience developing and testing REST APIs • Strong analytical and problem-solving skills with the ability to work in complex enterprise environments Required Technical Skills • Deep expertise in Core Java (JDK 17+) • Strong understanding of: • Multithreading • Concurrency • Memory management • Data structures and performance optimization • Hands-on experience with AWS services and serverless architectures • Strong experience with PostgreSQL and database performance tuning • Experience with Maven, Gradle, and CI/CD pipelines • Experience with testing frameworks and tools including: • JUnit / Mockito (or similar) • Playwright (or equivalent functional testing tools) • Gatling (or equivalent performance testing tools) Preferred Skills (Nice to Have) • Python scripting experience • Foundational knowledge of application security testing • Hands-on DevOps and automation experience