Stuart Courier App | Eric Lamarca

Context

The Courier App is the main tool couriers use throughout their working day: to navigate, accept jobs, resolve issues, and understand their earnings. Small improvements can have a big impact because couriers rely on it dozens of times a day.

My work covered both high-impact features and the foundational pieces that support them. Taken together, these efforts helped make the app more understandable, more supportive, and more respectful of couriers’ needs.

Increasing critical metrics without taking control away from couriers

I led the redesign of the Autostacking experience, a core workflow affecting courier earnings and operational efficiency.

By giving couriers a clear and honest opt-in path, activation rates moved from 25% to 50%, exceeding business expectations.

This became a powerful example inside the company: we could meet our targets without taking control away from couriers. It changed how we talked about future features and helped shift the culture toward more respect for user choice.

A clearer, more transparent and more helpful map for couriers

Couriers rely on the map throughout their working day, so even small improvements compound quickly.

I led improvements to two key parts:

The BaseMap

I refreshed the look and feel, made important locations easier to spot, and aligned the visuals with Stuart’s brand.

The multiplier map

Increased scannability, clarified visual hierarchy, and added a way to see upcoming multipliers so couriers could plan ahead.

These changes reduced unnecessary navigation friction, and helped couriers make better real-time decisions.

Ensuring the app becomes and remains accessible at scale

I initiated and led an effort to make the Courier App fully compatible with system text-size adjustments on both iOS and Android. This required refactoring core components and views, updating layout behaviours, and establishing clearer guidance for how new designs should respond to accessibility settings.

Beyond the technical work, I focused on building long-term habits across the team. I introduced lightweight checks in design reviews, shared examples of where accessibility broke in real usage, and helped engineers and PMs understand the impact on couriers with visual or cognitive constraints.

Over time, accessibility became something the whole team looked out for, not an afterthought. Now, as the app grows, it stays usable for a wider range of couriers.

Screenshots of the Courier App, with large text size in the OS settings.

Supporting other designers and improving the overall quality of the app

I provided direction and support for other designers working on new courier-facing features, including:

live chat between couriers and customers
resolving issues when a customer isn’t present
communications and notifications
earnings and payout clarity

I helped designers get clear on the problem, stay consistent with patterns, and make decisions that worked in real courier contexts. This support helped the team deliver work faster and with better results.