Hari Kishan Tammana

● Enterprise Cloud Transformation: Architected and led the end-to-end GCP transformation of the legacy EWS data warehouse, migrating more than 1 Petabyte of data to BigQuery and reducing infrastructure compute costs by 30%.

● GenAI & Self-Service Analytics: Spearheaded enterprise AI initiatives by conceptualizing and developing 'D.A.V.E.', an intelligent self-service GenAI interface. This democratized data access for approximately 150 business users across the EWS Data Warehouse, reducing ad-hoc data engineering requests by 80%.

● High-Availability Ingestion Architecture: Engineered a scalable Event Management Framework and a file-based ingestion architecture using GCP Composer. This automated end-to-end data loading processes, supporting more than 50 million events/day on an average across all the EWS product domains.

● Real-Time Data Strategy: Pioneered near-real-time data replication architectures from On-premise Oracle system to GCP leveraging Striim (Data integration and streaming platform for analytics and business intelligence), achieving less than 5 second latency and ensuring highly available data access for downstream reporting.

● Data Governance & Pipeline Optimization: Standardized data delivery by implementing a Schema Registry and Dynamic Custom Extracts, streamlining data enrichment into WIDE tables for billing and accelerating query performance by 30%.

● Strategic Client Delivery: Directed the technical architecture and delivery of high-profile, high-revenue integrations, including the Amazon PHQ migration and Walmart Custom Extracts, directly impacting $2M in client revenue.

• Managed deliverables for offshore team of 10 data engineers during Equifax GCP transformation project.
• Provided technical guidance to enhance team performance and project outcomes.
• Contributed to design and implementation of data engineering solutions within Equifax GCP environment.

• Contributed to framework design and implementation during Equifax GCP transformation from July 2019 to January 2022.
• Developed and supported FALCON fraud detection solutions for Mastercard using Java, Web Services, Couchbase, and AWS Beanstalk from June 2017 to June 2019.
• Directed Akana API Management services, managing API lifecycles across banking, retail, and logistics sectors from December 2014 to June 2017.
• Created automated API onboarding tool and CLI, enhancing operational efficiency.
• Designed custom Akana policy components for security features such as SAML authentication and token generation.
• Led PEGA integration projects, including complex SSO security integration with LAF.
• Selected to support Akana's client in Mexico from engagement kick-off through production support.
• Earned Top Talent Recognition Award for two consecutive years.

• Enhanced internal operational tools (DMT, Zeus UI) using Oracle ADF, APEX, Java, and PL/SQL to manage Oracle application environments.
• Collaborated with technical operations and infrastructure teams to scope requirements and design solutions.
• Developed automated processes, including Archive-Restore, to improve efficiency of data management.

• Directed design and development of sensor data processing application for logistics clients using Mule ESB, Drools, JMS, Smooks, and Java.
• Enhanced mobile logistics application server performance by implementing JSON communication and GZIP compression, reducing data transfer times.

• Designed and developed customizations, simulators, and front-end components for Order Management System for major telecom clients including AT&T, MetroPCS, Mobilicity, and Sprint.
• Utilized Java/J2EE, EJB, JMS, JAXB, SQL, PL/SQL, and WebLogic to enhance system functionality.
• Mentored junior developers to improve team capabilities and knowledge sharing.
• Gained onsite client-facing experience to strengthen relationships and project outcomes.
• Achieved early promotion to Senior Subject Matter Expert due to exemplary performance.

• Supported upkeep of Logistics Management System while collaborating with Code Quality and Testing Team for Carlson Wagonlit Travels.