
Kai Song-Sjodahl
UX research leader with 10+ years of experience running strategic, end-to-end research that shapes product priorities and roadmap decisions across consumer, enterprise, and complex workflow products. Built and scaled the UX research function at Zenni Optical from one researcher to five. Skilled in mixed methods, from contextual inquiry and usability testing to surveys and behavioral analytics. Bilingual in Mandarin Chinese and English.
UX Research Consultant, Vista Insight
Feb 2026 – Present
Independent UX research consultant. Help clients answer product and market questions through remote interviews and concept testing, running each study end to end as a solo researcher, from study design to synthesis and recommendations.
Senior UX Researcher, Zenni Optical
2021 – 2025
Founding UX research lead at Zenni Optical (e-commerce, medical device, and manufacturing systems). Built and scaled the research function from one to five researchers and set research strategy across e-commerce, prescription workflows, and internal production systems. Restructured the product catalogue around customers' mental models, reshaping the homepage, filters, and navigation. Established usability KPIs to measure design impact, built a research repository, and trained researchers and non-researchers to run and champion research.
Senior UX Researcher
Jan 2018 – Jul 2019
Worked across Tencent CDC (Customer Research & User Experience Design Center), Tencent's in-house research and design group. Led research for the WeChat QR code payment ecosystem, reducing transaction time by 20%, and supported the M&A team with market and product research that informed investment decisions.

Senior Analyst
Dec 2014 – Dec 2015
Moderated hundreds of interviews and focus groups
Managed automotive accounts including Mercedes-Benz, BMW, and Lexus
Researched in-vehicle user behavior and brand perception
Designed questionnaires, interview guides, and focus group protocols
Analyzed qualitative and quantitative data and presented findings to clients
Made recommendations on product development, usage and attitudes, and segmentation

MSc in Management


