• Built data pipelines, ML features, decision automation, workflow automation, risk controls, risk operations manual review experiences, and end user risk experiences which enabled the responsible launch of big bet products like Square Debit Card to go live with real-time fraud detection and mitigation.• Led the engineering of an onboarding email verification A/B test project with three peer engineers and collaboration and dependencies with five other teams. I successfully planned and worked through others to complete the project which enabled the Risk organization to test a hypothesis that requiring email verification before a seller can begin accepting payments would cause a meaningful reduction in payment fraud risk due to fake accounts.• Designed and built an internal web application which the Fraud Operations Team used to manually review and mitigate fraud risk associated with an IP address.

• Designed and developed a solution to embed NerdWallet’s plugin web applications on any website or ad network using a third-party JavaScript library or iframe. Both options provided a simple, declarative API that made plugin instantiation and customization easy for anyone, regardless of technical ability.• Developed a plugin web application using React, Redux, LESS, and Webpack to help connect consumers with local mortgage experts for assistance.• Ideated and implemented enhancements that increased conversion by 81% on NerdWallet’s Mortgage Rate Comparison Tool.• Created a consumer-first feature that went from hackathon to production after being recognized by the executive team as a standout idea.• Contributed to NerdWallet’s consumer-facing mortgage tools and calculators built with React, Redux, LESS, Express, Node.js, and Webpack.

• One of two engineers who started and built Dashboards, an AngularJS rich-client web application, from scratch to release.• Built many of the challenging features of Dashboards, including: Responsive dashboard layouts; multiple select, move, and 8-point resize of dashlets; auto-arranged dashboard layouts; faceted file search; KPI data visualization builder; responsive KPI data visualizations; and drill down interaction on data visualizations.• Created and significantly contributed to the living style guide and UI framework which helped design and engineering teams rapidly design and implement with reusable components, icons, and styles.• Co-authored the REST API design guidelines for Birst Engineering. Tirelessly advocated for well-designed APIs and following good coding conventions.• Worked well with teammates and members of other teams. I was always available to troubleshoot and offer ideas and feedback. I also provided mentorship and code reviews to new hires as the front end engineering headcount grew.

• Helped 33 million users sign up for Visa Checkout. Significantly contributed to the development of several features of the Visa Checkout consumer product up to its initial release: landing page, login, enrollment, forgot password, bulk payment instrument import, and the unauthenticated portion of the Visa Checkout payment widget. Written in HTML, CSS, JavaScript, jQuery, and Ruby on Rails.• Planned and set up a system and service availability monitoring solution for eight Dev/QA environments with 192 servers hosting 307 services. Reduced root cause investigation times up to 98% when the issue was due to system or service availability or health issues.• Developed a dashboard web application in Ruby on Rails that provided an aggregate view of system/service availability, smoke tests, and recent configuration changes per environment. Featured an availability report that displayed system/service availability per environment over a custom time range.

• Added memory statistics reporting functionality to the JavaScriptCore component of WebKit to improve memory reporting within the open-source, C++ based WebKit web-rendering engine.• Implemented a confidential software solution that allowed the Safari/WebKit Team to accomplish important short-term and long-term goals for the product.

• Managed and maintained a virtual test environment consisting of 80+ client and server VMs supporting hundreds of applications. Migrated virtual machines from Virtual Server hosts to a Hyper-V Failover Cluster to ensure high availability of the test environment.• Built virtual machines using Hyper-V and Virtual Server 2005 virtualization solutions. Built the first Bitlocker-enabled virtual machine in the test environment, which allowed the test team to discontinue use of physical laptop machines used for Bitlocker testing.• Assisted in development of test plan and executed testing for a security project which delivered several GPOs affecting all Server 2008 servers company-wide. Discovered 30+ bugs in testing and helped development team in determining fixes to those bugs. GPOs were deployed to production with no documented defects to date.