Daniel Lee

Chief Software Engineer at Visa

United States

About

building, and scaling highly secure, highly available, and globally distributed software platforms. Specialized in digital payments, tokenization, payment security, e-commerce infrastructure, and large-scale enterprise systems. Currently serving as Chief Software Engineer at Visa, leading the architecture and development of mission-critical token payment services that support global payment networks, issuers, digital wallets, and emerging payment technologies. Played a key role in the design, development, and evolution of Visa Token Service (VTS), one of the industry's foundational tokenization platforms enabling secure digital payments worldwide. Previously spent nearly a decade at eBay developing highly scalable checkout payment systems and distributed microservices supporting millions of transactions. Earlier career experience includes enterprise software, data warehousing, large-scale data processing, and data mining solutions. Passionate about solving complex engineering challenges, building high-performing teams, and delivering secure, resilient, and scalable technology platforms. Experienced in technical leadership, software architecture, cloud-scale systems, payment security, token lifecycle management, authentication technologies, and global service deployment.

Experience

  • Visa (United States)
    • Chief Software Engineer
      2021 - Present · 5 yrs 7 mos

      Engineer Lead, Visa Token Service – Post Provisioning. Designing and developing highly secure, highly available, high-performance token payments services and issuer services with global and regional deployment.

    • Senior Staff Engineer
      2016 - 2021 · 5 yrs

      Dev Lead, Visa Token Service – Core Team; Engineering Manager. Led one of two scrum teams that built Visa Token Service. Designed, built and maintained services that manage payments and token security, including payments key rotation, ID&V through OTP/AV/Issuer App, 3DS, eCommerce/In-App payment cryptography, QR payments, and token lifecycle management. Managed a team of 10+ engineers.

  • eBay (Full-time · 8 yrs 1 mo)
    • MTS2, MTS1 Software Engineer
      2011 - 2015 · 4 yrs

      Developed highly available and highly scalable RESTful microservices supporting eBay checkout and payment platforms.

    • Senior Software Engineer
      2007 - 2011 · 4 yrs

      Designed and delivered large-scale payment and commerce services supporting millions of global transactions.

  • Senior Software Engineer at Combasix
    Jun 2005 - Jun 2007 · 2 yrs 1 mo

    Developed enterprise applications and backend services for large-scale business platforms.

  • Software Engineer at Metaedge Ventures
    Jun 2003 - Jun 2005 · 2 yrs 1 mo

    Developed Data Warehouse Enterprise Software, processing large-scale datasets and supporting data mining and analytics initiatives.