Designed changes to industry interoperability standards in partnership with other healthcare vendors while integrating these changes into our own softwareLed a team of six developers in maintaining and enhancing our product's communication infrastructureServed as a primary point of contact for external groups, often providing design feedback and planning collaborative development on behalf of my own team as a technical lead and trusted representativeRewrote our outdated SMS and email integrationsRefactored data structures and workflows to improve speed and maintainability, achieving an 80\% reduction in response times for key workflows under the heaviest workloadsManaged product performance through monitoring performance tests, evaluating the scalability of new development, and designing projects to improve efficiencyRan usability studies, user interviews, and task-based testing to develop new user-friendly tools for information sharing and bulk communication

Modified Firefox for a proof of concept of using multiple DNS resolvers to improve privacyPresented findings on distributed DNS resolution at NDSS MADWeb WorkshopPrototyped and tested a DNS resolver that used adaptive TTL valuesImplemented recurring web crawls over 150K domains from the top 50K websites using Python and Selenium, collecting terabytes of DNS data to identify optimal TTLs in the wildAnalyzed network data obtained from web crawls to identify meaningful trends[1] N P Hoang, I Lin, S Ghavamnia, M Polychronakis, "K-resolver: Towards Decentralizing Encrypted DNS Resolution", in NDSS MADWeb Workshop ’20[2] Ivan Lin. 2021. "The Privacy Impact of Perpetual DNS Caching". Master’s thesis. Stony Brook University, Stony Brook, NY

Migrated payment system to a multi-stage subscription model with Plaid and Stripe integrations to handle hundreds of thousands of dollars in payments from our partners every monthDesigned data models and APIs to convert raw sales and demographic data from partners to useful analyticsResearched and prototyped apps to onboard thousands of client businesses and automatically manage their online Facebook and Google marketing campaigns

Created a system for querying, comparing, and displaying large blocks of shipment dataCollaborated with the marketing team to enact website coloring and design changes

Lead development of a Cordova-based mobile Android app for users to share events based in New York City