
Otonna
Web app
Otonna offers five levels of guided rewriting and focused feedback to help English learners write accurate, varied complex sentences.
See how it worksFeng Qiu
Senior Product Manager and Independent Builder
INTJJapanophileLearning FrenchiPhoneographer *Gym-goerFRIENDS fanaticTattooed
* Honorable Mention, 2025 IPPAWARDS
Senior Product Manager and independent builder based in Ontario.
Before moving to Canada, I spent eleven years building consumer products at Smartisan and Xiaomi. My work included mobile system apps, international versions of MIUI, a new business in Japan, and Xiaomi's first generative AI advertising platform. I'm now studying Applied Modelling and Quantitative Methods at Trent University.
The things I build on my own usually begin with a problem I know firsthand. DailyTrace started because I wanted to understand where my time went. Essayly and Otonna came from learning English. WordBoost came later, when I wanted vocabulary practice to fit naturally into everyday reading. I designed and built all four, with AI helping me turn ideas into working software.
For what comes next, I'd like to bring these two sides of my work together: the product judgment I developed on larger teams and the hands-on building I've done on my own. I want to work with a team that speaks openly about difficult decisions and listens to its users. I wrote down the longer story, which takes about three minutes to read.
iPhone app
Record your activities with one tap or a widget in DailyTrace. Timelines, heatmaps, and shareable reviews show where your time went.
Weekly rhythm · Monthly timing · Yearly rhythm · Focus Flow · Activity Mix
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Web app
Otonna offers five levels of guided rewriting and focused feedback to help English learners write accurate, varied complex sentences.
See how it works
Web app
Practice IELTS, TOEFL, and GRE essays with AI feedback in Essayly.ai.
Try it for free
Browser extension
WordBoost helps people learn English vocabulary while they browse. It highlights useful words and turns everyday reading into light review.
Try it for freeSenior Product Manager

Led product work for core Xiaomi system apps across international markets. Worked with regional teams to adapt features, language, and UX to local expectations.

Built a social commerce product for the Japanese market from early concept to launch. Defined the product direction, formed the team, and led delivery.

Led product work on Xiaomi’s first generative AI advertising platform, translating internal workflow needs into features.
Product Manager
View portfolioLed product planning, interaction design, and delivery for the Smartisan OS desktop, clock, recorder, and everyday system controls.
Helped plan product launches, PR campaigns, and marketing for the Smartisan community.

Contributed to Smartisan OS interface design, which received a Red Dot Design Award.

An interactive model for estimating user lifetime value from retention curves. It compares linear, logarithmic, exponential, polynomial, and power models.
Explore the study
See how 464,571 police-reported records differ by year, location, and category, and where the data stops short.
Explore the study
How many Big Macs does an hour of minimum wage buy? Compare 43 economies in July 2026, with a source for every wage.
Explore the index
Recent product updates and a snapshot of my AI use.
DailyTrace
Heatmap now shows the full year more clearly
DailyTrace
Accessibility support for post-2.0 features
DailyTrace
App Store featuring nominations were drafted
AI · Past 30 days

Training is part of my life outside work. Here’s the routine I follow—and a little about why I keep coming back.
Mainland China · Hong Kong · Japan · South Korea · Taiwan · Singapore · Malaysia · Thailand · India · Israel · Russia · Canada
If what you have read here sounds like a team you are building, I would be glad to talk.