# Yilun Sun > Founder | AI Product Lead | Voice AI Interaction Design | Mental Health | Social App | B2B Fintech | Columbia U Alumna | Double Degree in Biotech & Architecture Design Location: San Francisco Bay Area, United States Profile: https://flows.cv/yilunsun I’m a PM and product designer, passionate about solving real problems with AI and products. A Columbia graduate, I excel in product thinking, design execution, and rapidly visualizing concepts to test for market fit. ## Work Experience ### Sr Product Designer @ EazoAI Jan 2026 – Present ### AI Product Lead / Founder @ Lumi AI Jan 2025 – Present | San Francisco Bay Area AI Voice companion for individuals with ADHD — designed and built the full product from scratch. * Designed and implemented the entire front-end in TypeScript /  React, including 3D interactive scenes (Spline), dynamic UI components (shadcn, Tailwind), and responsive layouts — shipping code that matched the design vision with production-level polish. * Architected the full-stack AI agent system single-handedly: React/TypeScript front-end, Supabase back-end (database, auth, real-time), and voice LLM-powered conversational AI pipeline — improving user focus recovery time by 75%. * Architected end-to-end user flows from concept through interactive prototypes in Figma, then translated them directly into production code, eliminating design-to-dev handoff delays. * Acquired paying users within the first week of launch, achieving an 85% weekly renewal rate — validating strong product-market fit and user retention. * Confirmed commercial viability through seed user interviews (25% potential conversion rate) and organically grew a waitlist of 210+ users pre-launch. * Directed the marketing lead on user testing and Wizard-of-Oz experiments to validate AI interactions before engineering investment. Authored SOPs for both engineering and marketing teams and defined success metrics to align cross-functional execution. * Pitched at Berkeley SkyDeck and MiraclePlus (YC China); passed investor interviews. ### AI Product Lead / Founder @ Hugo AI Tour Guide Jan 2025 – Jan 2025 | San Francisco Bay Area Worldwide 1st Place (853 participants) — ElevenLabs × a16z Hackathon. Endorsed by CEOs of ElevenLabs and Vercel, and a16z partners. * Led product design and front-end development of a multimodal AI travel agent that combines real-time voice interaction, dynamic route mapping, and location-aware storytelling — built and shipped as a fully working web app within 40 hours. * Implemented the interactive UI in React with map integrations and voice-driven UX; collaborated with two engineers on LLM deployment via Dify to create a seamless conversational experience. * Secured post-hackathon backing from Silicon Valley incubator Beta University, along with funding support from Microsoft for Startups Hub and Google — validating the product’s commercial potential beyond a prototype. * Defined product strategy from 0-to-1: authored the PRD, scoped MVP features, and conducted on-site user research with 50+ real users to iterate on the experience before demo day. ### Sr Product Designer @ Mathos AI Jan 2025 – Jan 2025 Led design of Math Tutor product ### Product Designer @ SenseTime 商汤科技 Jan 2024 – Jan 2024 Led the interaction design of an AI dating App targeting North American Gen Z: * Independently designed the entire product interaction design, from 0 to 1. Through rapid user testing and iteration, and cost-benefit analysis of feature designs, successfully launched the iOS MVP within two months, achieving stable daily user growth. * Conducted detailed user interviews and experience walkthroughs to identify user confusion with product features. Quickly updated improvement plans and product strategies to boost daily active users. Implemented agile development for rapid product iteration and A/B testing, achieving a 20% day-2 retention rate. * Led the monetization efforts for the dating product. Through desk research, rapid prototyping, and prioritization, drove the launch of revenue-generating features. ### User Experience Designer @ Arbol Jan 2022 – Jan 2023 | San Francisco Bay Area Led the product design and strategy of an internal insurance cash flow and B2B contract management system: * Redesigned an internal insurance cash flow and contract management system, optimizing information architecture for large databases and workflow. This reduced contract management time from 2 hours to 8 minutes, saving $1M annually in legal and accounting costs. * Improved user adaptation of new B2B system, cutting employee training costs by 50% through participatory discussions, co-design, and Excel-based user testing, showcasing user-centered design. * Led UI/UX design from 0 to 1 of a financial blockchain insurance B2B dashboard, contributing to generating 20 million in profits. ### AI product designer @ Several International Companies Jan 2023 – Jan 2023 - Analyzed new user growth and retention for Mymap. AI by tracking key data points, identifying reasons for user drop-off, increasing 30-day retention by 15%. - Redesigned Mymap. AI’s login and interaction flow, increasing subscription rates by 26% by creating high-fidelity prototypes in Figma to improve user onboarding. - Designed brand visuals, animations, and design systems for JENOVA. AI’s web and mobile platforms, achieving 85% user satisfaction through a unified visual language and experience. ### Product Designer/ Business Strategy @ Stealth AI Startup Jan 2021 – Jan 2023 | San Francisco Bay Area * Led end-to-end product design and business strategy for 2 Apps. Updated 2 versions of a Dating App and 3 versions of a News Debate App, with 6 rounds of user testing and 100+ user interviews. Gathering feedback from A-B tests for 4 times with 80 users. 92% of the target users sign up to use the product. * Direct go-to-market strategy. This includes organizing online communities for potential users, cold start strategies, and social media promotion strategies. It also involves establishing and maintaining relationships with cooperative organizations, including psychologists and student associations. * Pitched 5+ investors from MiraclePlus (ex-YC China), GSR Ventures, Source Code Capital, etc. Got one investment intention. * Recruited team members, including developers from Meta, Amazon, CMU and Columbia University. Organized team meeting structures and set timelines. ### 3D Experience Designer Intern @ Vanke Jan 2021 – Jan 2021 | Shenzhen, China * Created detailed 3D mockups of floor plans, renderings, elevations, and architecture for an old town renovation project, and presented them to stakeholders. Helped the company secure the government’s renovation order. ### 3D Visual Architectural Design Intern @ Pelli Clarke Pelli Architects Jan 2021 – Jan 2021 | Shenzhen, Guangdong, China * Designed and presented architectural details for a skyscraper project, using 3D illustrations to compare and recommend solutions. My lobby design was adopted by the client. * Created the visual storytelling file for an Urban Design international competition, using mockup 3D renderings and animations by Adobe Photoshop, Illustrator, InDesign, and Rhino to simplify complex architectural designs and drawings. Helped the company enter the top 3 internationally (Won 0.5 million USD bonus) , with a chance to win a government order worth hundreds of millions (final result pending). ### Urban Experience Designer Intern @ gmp von Gerkan, Marg and Partners Architects Jan 2020 – Jan 2020 | Shenzhen, Guangdong, China * Designed urban 3D and built mockup for city street experience for an urban design competition. Considered various influencing factors, such as smart city, energy recycling, ecological restoration, and self-driving technology. * Collaborated with four team members to win the 1 place and $ 1.1 million bonus. The design plan is being implemented. ### Experience Designer & Researcher Intern @ URBANUS Architecture & Design Jan 2019 – Jan 2019 | Shenzhen, Guangdong, China * Conducted research on the lack of vitality in the central business district (CBD) of Shenzhen, including desktop research, user interviews with 25 citizens, and 122 surveys. * Helped visualize the integrated solutions, using Adobe Photoshop, Illustrator, InDesign, and Rhino. My visualize results were exhibited at the Seoul Biennale 2019. ## Education ### Master of Science - MS in Architectural Design Columbia University ### Cross Registration- Computer Science School in UX & HCI Columbia Engineering ### Bachelor of Architecture - BArch in Architecture Shenzhen University ### Bachelor of Science - BS in Biotechnology Shenzhen University ### Cross-registration Columbia Business School ## Contact & Social - LinkedIn: https://linkedin.com/in/yilun-s - Portfolio: https://www.yilun.space --- Source: https://flows.cv/yilunsun JSON Resume: https://flows.cv/yilunsun/resume.json Last updated: 2026-04-13