London

Parmi leads the Global Tax Department’s GenAI Enablement and Transformation programme at Amazon, shaping how large-scale tax teams adopt AI responsibly and effectively. With 18 years’ experience across Indirect Tax, global compliance, product strategy and technology delivery, he has built and led tax technology solutions used by millions of customers worldwide. His current focus is building AI fluency across tax teams, defining governance frameworks, and developing AI-powered capabilities that unlock scale and quality for global compliance operations.

I lead the global Data & Tech Strategy Tax team at Booking. We are a specialist Tax Transformation team sitting within the Tax Department - bridging the gap between Tax, Product, Data & Engineering. I lead an international multidisciplinary team of Tax Data, Tax Technology, AI and analytics, as well as Project and Program management experts. Our mission is to design and implement scalable, intelligent systems and capabilities that strengthen compliance and enhance operational efficiency and enable decision making across the business. As a qualified tax consultant and chartered accountant, I have also successfully designed and executed tax strategies for multinational organizations and established and nurtured high-performing teams in various locations.

J Gu is a seasoned product leader at Meta, specializing in AI-driven tax and finance innovation. He builds intelligent platforms that simplify global indirect tax compliance, streamline direct tax planning, and automate complex financial operations at scale. His recent work focuses on applying Agentic AI to transform solutions —improving data reconciliation accuracy, reducing audit exposure, and modernizing end-to-end financial workflows. Prior to Meta, J worked as a Senior Manager of Product Management on the Fulfillment by Amazon (FBA) team. In this role, he led initiatives that enhanced operational efficiency and delivered value to sellers worldwide. J began his career as a scientist, developing advanced algorithms in the X-ray field to solve complex technical challenges before transitioning into product management. He holds an MBA from the University of Texas at Austin and has advanced training in cloud computing, data analytics, and machine learning. J also holds patents in the medical field for AI-driven treatments in neurotherapy. With deep experience leading cross-functional product, engineering, and business teams, J is known for delivering scalable, customer-centric solutions that address the toughest pain points for B2B and enterprise customers. His background blends strong technical and analytical depth with strategic execution.

David Welliver is a dynamic thought leader, spearheading the future of global indirect tax at Trimble Inc., a Fortune 500 technology powerhouse based in Silicon Valley. With a robust background spanning public accounting, retail, and software technology, David has cultivated extensive expertise in U.S. state and local tax and global indirect tax (VAT). His visionary leadership is laser-focused on innovation, driving the strategy for implementing cutting-edge global technology solutions that dramatically enhance financial value, reduce risk, and create unprecedented efficiencies in complex indirect tax processes worldwide. Crucially, David is charting the course for the Tax Department’s embrace of Generative Artificial Intelligence, strategically deploying AI agents to revolutionize workflows and elevate the organization’s risk profile—a clear demonstration of his forward-thinking approach to tax technology. Underpinning this innovation is David’s leadership of a highly agile team, which thrives on cross-cultural collaboration to navigate the organization’s diverse landscape. David and his team possess a unique ability to synthesize tax law, economics, technology, and change management, ensuring these complex disciplines work in concert across operations in the US, Europe, the Middle East, Asia, and Africa. Beyond his corporate contributions, David is a recognized policy influencer. He served with distinction as a commissioner on Minnesota’s influential 21st Century Tax Reform Commission, where he led the critical Income Tax Reform Working Group that made important recommendations to revitalize the Minnesota economy. His commitment to the profession also includes six years of service on the Board of Directors for the Minnesota Society of Certified Public Accountants, and in his local community as a member of the Board of Directors of Penumbra Theatre, Minnesota’s preeminent Black theatre company. A highly accomplished professional, David is a Certified Public Accountant (CPA) and a Chartered Global Management Accountant (CGMA). He holds a Masters in Business Administration (MBA) from the University of Minnesota's Carlson School of Management. He presently resides in Saint Paul, Minnesota, USA, but is trying to spend winters in sunnier and more moderate climates.

Josh Reardon is a Senior VAT Manager at Zoom Communications, Inc.. With over twelve years of experience in indirect tax, Josh specialises in the intersection of VAT and digital services. At Zoom, Josh plays a key role in shaping and executing VAT strategies that support the company’s global growth, ensuring compliance with evolving tax legislation while leveraging technology to streamline reporting, maximise accuracy, and enhance efficiency. Josh’s role spans the full VAT lifecycle - from policy through to compliance - requiring an end-to-end perspective where technology plays a critical role in managing complexity and time constraints effectively. Before joining Zoom, Josh worked at EY in both the UK and the US, with a specific focus on advising technology clients on global VAT and GST compliance, process improvement, and the implementation of tax technology solutions. Josh’s expertise spans VAT process transformation, digital services taxation, and the integration of tax technology to meet complex business-to-government reporting requirements. His work reflects a commitment to innovation and collaboration in navigating the rapidly changing landscape of global digital indirect tax.