UX Designer Cover Letter Example (2026)

I have been a Duolingo user for 830 consecutive days, and the moment that impressed me most was not a gamification feature -- it was the way your onboarding adapts placement test difficulty in real time without the learner feeling tested. That invisible UX calibration is the kind of design problem I find most rewarding, and it is why I am reaching out about the Senior UX Designer role on your learner experience team.

At my current company, a consumer fitness app with 2.4M monthly active users, I redesigned the workout customization flow after running 32 moderated usability sessions and analyzing heatmap data from 18,000 sessions. The original flow had a 41% drop-off at the third step. I prototyped four alternatives in Figma, tested them in unmoderated A/B studies, and shipped a progressive disclosure pattern that reduced drop-off to 14% and increased workout completion rates by 22%. That project taught me that in consumer products, the design challenge is rarely about adding features -- it is about removing friction users cannot articulate.

I also built our design system from a collection of one-off components into a structured library of 140+ tokens and 68 components with documented interaction states, accessibility annotations, and responsive breakpoints. It reduced design-to-engineering handoff questions by 60% and gave our team of four designers a shared language that accelerated iteration speed. My portfolio includes the full case study with before-and-after flows, research artifacts, and outcome data.

I would love to discuss how my consumer product experience and research-driven process could contribute to the learner experience challenges Duolingo is tackling next. The case study for the workout flow redesign maps directly to the kind of adaptive UX problems your team works on.