# Hari S. > -- Location: United States, United States Profile: https://flows.cv/haris1 Architecting intelligent systems for financial transformation Engineering leader with deep expertise in cloud-native systems, AI/ML engineering, and high-performance distributed computing, delivering scalable and secure platforms in banking and fintech. Experienced in building ML pipelines, real-time risk and fraud detection, and intelligent automation using Python, Java, PyTorch, Scikit-learn, Spring Boot, Kafka, and AWS. Skilled in deploying Generative AI (Gen AI) solutions, Retrieval-Augmented Generation (RAG) architectures, vector embeddings, and graph databases to power context-aware, intelligent systems. Passionate about agentic AI orchestration and emerging AI/ML technologies that transform decision-making and customer experience. ## Work Experience ### Principal Software Engineer @ Blackhawk Network Jan 2022 – Present | Pleasanton, California, United States Providing technical oversight of distributed engineering teams in India and the USA for a unified risk platform consolidating fraud detection across gift card channels. Re-architected XGBoost-based ML services integrated into a centralized risk engine. Designed a real-time data aggregation framework using DynamoDB and Lambda architecture, and developed AWS Batch-based data injection pipelines. Delivered detailed design of a high-performance, Drools-based rule engine. Exploring Generative AI tools like Claude to enhance fraud decisioning. ### Sr Principal Architect @ Boomi Jan 2022 – Jan 2022 | Chester Heights, Pennsylvania, United States Architected and developed a real-time Flink streaming application on AWS EKS to ingest and process data from NFS to Snowflake. Built and managed Airflow DAGs to orchestrate batch workflows within the data lake. Designed and implemented data privacy controls to remove opt-out accounts from multiple data sources. Collaborated closely with data scientists to develop scalable machine learning pipelines using AWS SageMaker. ### Vice President @ JPMorganChase Jan 2017 – Jan 2021 | Wilmington, DE Technical Team Leader and Architect with deep expertise in designing real-time, high-scale systems and deploying machine learning in production. Architected and led the development of a low-latency fraud detection platform processing 30M+ daily transactions using Spring Boot, distributed Linux, MQ, ELK, Cassandra, and XGBoost—earning a global innovation award. Partnered with data scientists to source training data across banking channels and built a Java framework to convert XGBoost PMML models into efficient native code. Designed a multi-cluster Cassandra architecture for real-time and batch ML pipelines, and drove cloud-based ML POCs using AWS services (S3, Lambda, SageMaker). Recognized for leading cross-functional teams, setting technical direction, and delivering innovative, production-grade solutions at scale. ### Vice President @ Bank of America Jan 2013 – Jan 2017 | Newark, Delaware, United States Led the detailed design and development of various risk and fraud technology projects, including real-time fraud detection middleware processing credit card transactions from core banking systems using Spring Integration (SEDA), Drools, and distributed caching; predictive analytics integration with big data platforms across credit and debit channels leveraging distributed computing and Cassandra; and a scalable travel prediction scoring engine supporting real-time decisioning. Also mentored and led a high-performing technical team through end-to-end solution delivery. ### Principal Software Engineer @ Capital One Jan 2010 – Jan 2013 | Wilmington, Delaware, United States Detail design and development of auto loan workflows on the Capital One 360 platform, integrating RTM middleware services. Implemented KYC, Early Warning Systems (EWS), and advanced security authentication mechanisms for the retail banking web platform. ### Software Engineering Manager @ IBM Kenexa - Business Partner is now High Performance Profiling Jan 2009 – Jan 2010 | Wayne, Pennsylvania, United States Designed and developed core components of the data integration module for Kenexa's recruitment platform using Java, XML, XSL, StAX, DOM parsers, Hibernate, and Spring JPA. Built contract-first web services with Spring-WS and implemented batch job streams using Quartz Scheduler in a clustered server environment. Oversaw development efforts across a blended team ### Development Lead @ Nielsen Jan 2007 – Jan 2009 | New York City Metropolitan Area Implemented the Endeca Information Platform to enhance search and navigation across major Nielsen websites including Billboard.com, Adweek.com, and HollywoodReporter.com. Also contributed to various projects related to Nielsen's content management systems, improving digital content delivery and user experience. ### Senior Application Developer @ Humana Jan 2005 – Jan 2006 | Louisville, Kentucky, United States Designed and implemented a persistence framework for a multi-step web enrollment application, and developed various backend procedures using Apache Struts 1.2, Spring 2, Hibernate 2, and Oracle 9i ### Technical Team Lead @ Infosys Jan 1999 – Jan 2005 | United States Served as onsite lead and senior developer at major U.S. client locations including Apple, Williams-Sonoma, and Walgreens. Led the design and development of Java-based middleware platforms using Vitria, and contributed to retail merchandising systems and data warehousing applications across Unix, Oracle, and AS/400 environments. ## Education ### Bachelor of Technology - BTech National Institute of Technology Calicut ### Applied Generative AI Certificate Program The Johns Hopkins University ## Contact & Social - LinkedIn: https://linkedin.com/in/hari-s-ab1497a0 --- Source: https://flows.cv/haris1 JSON Resume: https://flows.cv/haris1/resume.json Last updated: 2026-04-12