K Kristopher Baker iOS · Growth · Tokyo
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Wolt / DoorDash · Senior Software Engineer · Membership Growth · 2025

Improving subscription conversion through cart and checkout entry points

Client-side DRI for two flagship Wolt+ growth experiments — cart entry point and express signup. Drove cross-platform RFCs and pushed to split the work into independent rollouts, enabling faster iteration and clearer A/B validation.

iOSGrowthSubscriptionA/B testing

Client-side DRI (iOS, Web, Android)

role

2

experiments split

fully rolled out

status

Context

Wolt+ is Wolt’s subscription product, similar to Uber One or DashPass. A key growth lever is how and when users are prompted to subscribe during the ordering flow.

The problem

Subscription entry points were limited and required users to leave the order flow. We wanted to introduce new surfaces in cart and checkout, along with a faster “express” signup experience — but the initial plan bundled everything into a single release, increasing complexity and delaying validation.

Approach

I acted as client-side DRI across iOS, Web, and Android, driving RFCs and alignment with product, design, backend, and data science, while leading iOS implementation.

Early on, I pushed to split the work into independent experiments:

This allowed us to ship sooner and learn faster instead of blocking on a more complex implementation.

For express signup, I worked through several UX and technical constraints:

I also worked closely with data science to validate instrumentation and debug misleading A/B test results, ensuring we were measuring the right signals.

Outcome

My role

Client-side DRI across iOS, Web, and Android — leading RFCs, stakeholder alignment, and experimentation strategy, with hands-on iOS implementation.

Next

Expanding subscription value with long-distance delivery Wolt / DoorDash