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I am a Senior Software Developer with over 20 years of enterprise experience specializing in Java-based systems. My expertise includes high-performance backend architecture, cloud-native modernization, and scalable microservices in distributed environments. Recently, I have expanded my focus to AI/ML integration, enabling predictive diagnostics, anomaly detection, and intelligent middleware features in large-scale Java platforms. I have a proven ability to embed machine learning into enterprise software without compromising stability, security, or maintainability. I am a trusted technical leader and long-time contributor to JVM-based infrastructure at Oracle, BEA Systems, and Sun Microsystems.…I am a Senior Software Developer with over 20 years of enterprise experience specializing in Java-based systems. My expertise includes high-performance backend architecture, cloud-native modernization, and scalable microservices in distributed environments. Recently, I have expanded my focus to AI/ML integration, enabling predictive diagnostics, anomaly detection, and intelligent middleware features in large-scale Java platforms. I have a proven ability to embed machine learning into enterprise software without compromising stability, security, or maintainability. I am a trusted technical leader and long-time contributor to JVM-based infrastructure at Oracle, BEA Systems, and Sun Microsystems.

Christopher Hahn

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I am a Senior Software Developer with over 20 years of enterprise experience specializing in Java-based systems. My expertise includes high-performance backend architecture, cloud-native modernization, and scalable microservices in distributed environments. Recently, I have expanded my focus to AI/ML integration, enabling predictive diagnostics, anomaly detection, and intelligent middleware features in large-scale Java platforms. I have a proven ability to embed machine learning into enterprise software without compromising stability, security, or maintainability. I am a trusted technical leader and long-time contributor to JVM-based infrastructure at Oracle, BEA Systems, and Sun Microsystems.…I am a Senior Software Developer with over 20 years of enterprise experience specializing in Java-based systems. My expertise includes high-performance backend architecture, cloud-native modernization, and scalable microservices in distributed environments. Recently, I have expanded my focus to AI/ML integration, enabling predictive diagnostics, anomaly detection, and intelligent middleware features in large-scale Java platforms. I have a proven ability to embed machine learning into enterprise software without compromising stability, security, or maintainability. I am a trusted technical leader and long-time contributor to JVM-based infrastructure at Oracle, BEA Systems, and Sun Microsystems.

Available to hire

I am a Senior Software Developer with over 20 years of enterprise experience specializing in Java-based systems. My expertise includes high-performance backend architecture, cloud-native modernization, and scalable microservices in distributed environments. Recently, I have expanded my focus to AI/ML integration, enabling predictive diagnostics, anomaly detection, and intelligent middleware features in large-scale Java platforms.

I have a proven ability to embed machine learning into enterprise software without compromising stability, security, or maintainability. I am a trusted technical leader and long-time contributor to JVM-based infrastructure at Oracle, BEA Systems, and Sun Microsystems.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

Javanese

Fluent

Work Experience

Senior Software Developer / Tech Lead at Oracle

May 1, 2008 - Present

Led enhancements to Oracle WebLogic Server and Coherence, optimizing multi-threaded performance, JMX observability, and Java EE integration for OCI hybrid deployments. Implemented intelligent diagnostics by integrating Java microservices with Oracle ML models via REST, enabling real-time issue prediction and automated performance tuning suggestions. Collaborated with internal Data Science teams to expose AI model outputs through WLDF dashboards and Java Flight Recorder metadata. Developed Java interfaces to connect with OCI Data Science endpoints supporting predictive autoscaling, anomaly detection, and pattern-based alerting. Modernized core services using Java 11–17, Spring Boot, and OCI DevOps while mentoring teams on safely incorporating ML features in production Java systems. Led global initiatives for secure API design (OAuth 2.0, JWT) and robust logging/monitoring across microservices.

Senior Engineer at BEA Systems

May 1, 2008 - August 6, 2025

Developed SOA tooling for metadata-driven orchestration, later extended with rule-based decision logic informed by user behavior analysis. Piloted statistical scoring for SLA violations using historical metrics, laying groundwork for predictive maintenance capabilities. Maintained critical Java EE components (JMS, EJB, JTA) while experimenting with early ML4J libraries for intelligent queue prioritization in QA prototypes.

Java Developer at Sun Microsystems

December 1, 2005 - August 6, 2025

Contributed to JDK platform enhancements including concurrency libraries now foundational in scalable ML-serving pipelines. Supported XML and early web services teams in exploring schema inference and WSDL generation using statistical grammar mining. Participated in cross-functional working groups exploring Java’s role in early grid computing, now foundational to distributed ML training.