{"id":1778,"date":"2026-03-19T17:50:32","date_gmt":"2026-03-19T17:50:32","guid":{"rendered":"https:\/\/datadecoded.com\/ldn\/?post_type=speaker&#038;p=1778"},"modified":"2026-03-19T17:54:14","modified_gmt":"2026-03-19T17:54:14","slug":"douglas-li","status":"publish","type":"speaker","link":"https:\/\/datadecoded.com\/ldn\/speakers\/douglas-li\/","title":{"rendered":"Douglas Li"},"content":{"rendered":"<p>Douglas Li is a co-founder and CEO of Lightfern, and was the first hire for OpenAI UK as a Member of Technical Staff. His research team dramatically improved GPT-4o&#8217;s writing ability, voice accents, image generation, and overall performance. Before that, he was an IC &amp; eng manager at Meta, where he built Activity Log, the privacy selector, Chat, Messages, and VR Avatars and Workrooms together with friends.<\/p>\n<p>Lightfern is a UK founded startup that&#8217;s trained the world&#8217;s best autocomplete model and placed it within email. Working as a browser extension, Lightfern augments your native email client, pulling context from your email threads to predict whole phrases as you type. It nails your greetings, signoffs, style, and even fine details such as invoice numbers or your client\u2019s vacation last month.<\/p>\n","protected":false},"featured_media":1779,"template":"","speaker-category":[10],"class_list":["post-1778","speaker","type-speaker","status-publish","has-post-thumbnail","hentry","speaker-category-speaker"],"acf":{"position":"CEO\/Co-Founder","business":1780,"email":"","phone":"","website":"","address":"","linkedin":"","facebook":"","instagram":"","youtube":"","x":"","bluesky":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.6 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Douglas Li - Data Decoded LDN<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/datadecoded.com\/ldn\/speakers\/douglas-li\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Douglas Li\" \/>\n<meta property=\"og:description\" content=\"Douglas Li is a co-founder and CEO of Lightfern, and was the first hire for OpenAI...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/datadecoded.com\/ldn\/speakers\/douglas-li\/\" \/>\n<meta property=\"og:site_name\" content=\"Data Decoded LDN\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/DataDecoded\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-19T17:54:14+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/datadecoded.com\/ldn\/wp-content\/uploads\/sites\/4\/2026\/03\/Douglas-Li.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"721\" \/>\n\t<meta property=\"og:image:height\" content=\"690\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@DataDecoded_HQ\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/datadecoded.com\/ldn\/speakers\/douglas-li\/\",\"url\":\"https:\/\/datadecoded.com\/ldn\/speakers\/douglas-li\/\",\"name\":\"Douglas Li - 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