Notes and essays by Sergey Kruglov on product design, technology, software, and the craft of building digital products.https://skruglov.com/https://skruglov.com/projects/vana/https://skruglov.com/projects/vana/R&D for Vana Labs — insight cards, 3D reconstruction on Metal, generative audio, and messenger agent templates in a native iOS demo.Sun, 01 Mar 2026 00:00:00 GMThttps://skruglov.com/projects/4k-download-site/https://skruglov.com/projects/4k-download-site/As Head of Design, led the 4K Download website redesign for 60M+ users, launched subscription UX in 190 countries, and built the token-based design system behind it.Wed, 01 Oct 2025 00:00:00 GMThttps://skruglov.com/projects/surrly/https://skruglov.com/projects/surrly/A solo-built iOS dream journal on the App Store — designed, coded, and shipped in three months.Mon, 01 Sep 2025 00:00:00 GMThttps://skruglov.com/projects/flipp/https://skruglov.com/projects/flipp/Web3 product design for a Gen Z crypto app — iOS MVP from onboarding to flip flow. Acquired by Rarible.Sat, 01 Mar 2025 00:00:00 GMThttps://skruglov.com/projects/lalal-ai/https://skruglov.com/projects/lalal-ai/Founding designer behind the product, brand, and design system foundations that helped LALAL.AI scale to 3.8 million MAU.Sat, 01 Mar 2025 00:00:00 GMThttps://skruglov.com/projects/ai-video-cut/https://skruglov.com/projects/ai-video-cut/Founding designer for an AI video tool that shipped an MVP in six weeks and reached 25,000+ users in its first growth stage.Sat, 31 Aug 2024 00:00:00 GMThttps://skruglov.com/blog/09-one-year-with-dot/https://skruglov.com/blog/09-one-year-with-dot/My journey to WWDC 2023, from getting an invitation to experiencing Apple Park, meeting the Vision Pro, and everything in betweenTue, 08 Aug 2023 00:00:00 GMThttps://skruglov.com/projects/waveroom/https://skruglov.com/projects/waveroom/Principal designer on Waveroom — a browser-based remote studio with a cross-platform design system and UX built around the constraints of recording in the browser.Tue, 31 Jan 2023 00:00:00 GMThttps://skruglov.com/projects/4k-download/https://skruglov.com/projects/4k-download/Led redesign of five desktop apps at 4K Download, shipped new products, and helped grow the suite past 60 million users.Thu, 31 Dec 2020 00:00:00 GMThttps://skruglov.com/projects/combin/https://skruglov.com/projects/combin/Founding designer on Combin, an Instagram growth product — two cross-platform desktop apps, product pages, and marketing assets from zero to launch.Sun, 31 May 2020 00:00:00 GMT