Stef Pi

Stef is An experienced, curious, and versatile designer with more than 12 years of experience designing and building digital products across web and mobile.

she is currently leading payments on the whatsapp brazil team at meta fintech.

formerly design at affirm and tripactions.

Senior product designer @ whatsapp br. passionate about transforming payments + finance and bringing transparency to transactions.

Previously led design on the consumer payments team at WhatsApp (Meta FinTech), designing for nearly 2 billion people. Before that, helped to transform financial planning and forecasting operations within the company, driving end-to-end design, collaborating across organizations and finance leaders, resulting in more efficient budgeting, hiring, and forecasting.

Before Meta, led payments and expenses at TripActions Liquid, designing end-to-end T&E solutions for nearly 8,000 customers. also worked on the checkout experience for the merchant team at Affirm, and designed for complex problems in cybersecurity at Cloudflare (Area 1 Security).

stef is a creative designer specializing in product strategy, visual, and interaction design. she also has considerable experience in design thinking, design strategy, accessibility design, design systems, and more.

Selected projects

Product design, brand identity,
and interaction design projects

Whatsapp Brazil
google pixel 2 phone displaying whatsapp brazil payments setup screen
icon of whatsapp logo
consumer Payments
on wAhatsapp BRazil
novi x whatsapp
iphone 13 pro max phone displaying novi bank connection screen
icon of novi's diem symbol
integration of Novi
wallet into WA payments
Liquid control panel
macbook pro displaying tripactions policies mockups
circle icon
System for customer funding,
information, and settings
iphone 13 pro max displaying affirmgo checkout screen
icon of affirm's logo
Optimized checkout experience
for low AOV purchases
Affirm edu modals
macbook pro displaying affirm's educational modal
icon of affirm's logo
Upfunnel messaging for
new-to-Affirm users
preemptive indicators
macbook pro displaying area 1 preemptive indicators product
triangle icon
Scan all inbound emails to
identify targeted attacks
Finance & Business planning
macbook pro displaying resource management tool mockup
Resource management solutions
Whatsapp india
google pixel 2 displaying whatsapp india payments value props
icon of whatsapp logo
onboarding with TPP for
whatsapp india payments
tripactions policies
macbook pro displaying tripactions policies mockups
circle icon
core policies for Tripaction's
payments platform
Integrated checkout
macbook pro displaying affirm integrated checkout mockup
icon of affirm's logo
Creating an upfunnel checkout
option and increasing conversion
Checkout experiments
iphone 13 pro max displaying affirm signup value props
icon of affirm's logo
Experiments to improve
Affirm’s checkout experience
Mailstream reporting
iphone 13 pro max displaying mockup of area 1 email reporting
triangle icon
A weekly report identifying
suspicious activities