David B.

Building the next generation all-in-one workspace / knowledge management tool / 1970s back to the future hypertext platform

• Built numerous internal trust & safety / spam tools, maintained and documented internal administrator tooling
• Lead a team of engineers in developing two week formal onboarding curriculum, built the first codelab
• Split notion's public content onto a separate domain for increased resilience
• Decreased search latency by over 50%, increased relevancy by over 10%
• Oversaw implementation of first machine learning model in the product (search ranker)
• Implemented user recommendation model in the product (used by both user search and document search ranking)
• Implemented engineering workflow / developer-experience tooling
• Maintained notion internal developer CLI
• Site lead: Grew NYC from no office to 150+ people in an office in Soho. Implemented NYC onboarding, site updates, offsites and lunch-and-learns,
• Migrated elasticsearch from AWS managed to self-hosted terraform for cost savings, architecture flexibility & performance improvements
• Implemented observability dashboards and tooling for search indexing & serving
• Improved korean, english and japanese stemming in document search
• Created search experimentation framework
• Created search backend routing framework
• Implemented comments sidebar with improved unread comment tracking

Developer-friendly, privacy-first geofencing and geocoding that helps product and growth teams build amazing location-based app experiences. Radar.io is a tool in the Mapping APIs category of a tech stack.

• Implemented significant improvements to internal developer tooling & testing
• Lead effort to roll out a full suite of geo APIs mainly from open source efforts
• Evaluated multiple open source routing engines, built production/deployment tooling around two of them
• Integrated new source of geographic data across multiple services
• Made contributions back to pelias open source geocoder

• Fable: Built initial backend for book club reading app, transitioned project to full time developer.
• Meta: Took over in progress social network + marketplace app from a consulting firm. Rebuilt site with industry best practices + much larger feature set.
• A Little Drive: Built proof of concept for a new kind of list building application, billed as "wirecutter for everyone." https://www.mixlet.com/

Exploring the intersection of generative art, immersive experiences, connection and physical accessories.

• Assemble: an immersive theater piece set in the Red Hook IKEA https://blackmad.com/digital-projects/assemble/ - featured in No Proscenium, Time Out and Gothamist
• What is my purpose? an anonymous postcard app http://purpose.blackmad.com
• Blackmadeco: generative art patterns on custom fit leather accessories http://gen1-alpha.blackmade.co/
• Dispatches From Yesterday's Future - expo/react-native app in Apple app store to share feelings & memories from quarantine - https://apps.apple.com/us/app/yesterdays-future/id1507282393
• ~ secret immersive temporary covid-19 virtual art project ~

• Lead growth of NYC engineering from ~40 to ~90 people
• Started site-wide new hire orientation
• Met with new hires & coordinated first day with manager

It's What's Happening.

• Oversaw development of Twitter Moments feature from initial conception to launch to unification into Events experience
• Managed a team of 20 backend & frontend engineers across two offices and multiple remote locations
• Launched v1 in a tight six month timeframe, followed by rapid iteration
• Set a model within Twitter for speed & quality of product delivery and for team cohesion
• Outsourced & oversaw development of internal editorial tools by a third party development firm
• Worked with a team of editors & curators to build policy and tooling for human curated content on Twitter
• Launched in 15+ countries. Saw continuous growth of usage and stickiness over 2+ years
• Organized efforts into multiple sub-teams with multiple PMs and TLs, lead sprint planning and retros

A social network for places - to record visits and recommend real world places to you and your friends.

• Oversaw the development of Foursquare's venue database and tooling
• Built out geographic infrastructure, including the open source coarse geocoder twofishes, funding Quattroshapes - an open source administrative boundary compilation, and signing a deal with a third party fine geocoder
• Wrote or oversaw almost all of the crowd sourced venue editing tools in use by Foursquare, including the launch of a mobile editing webview in use by the client apps
• Added hours, attributes (good for groups / delivery / etc) and local name translations to venue database capabilities
• Expanded category hierarchy by 2x, worked with external icon illustrator
• Launched event checkins, which involved matching venues with multiple external event providers, deduplicating venues across multiple providers
• Built numerous internal tools including what became s2map.com as well as the venue shape visualization seen in most public presentations
• Managed a team of 5 people owning all of the venues, events, geocoding, tooling and superuser infrastructure

• Worked on geocoding and local search