DuoTalk — A Real-Time Conversation Web App

DuoTalk is a quiet, privacy-conscious conversation product that gives two people the same guided question at the same time. I designed and developed the bilingual experience, temporary room architecture and responsive interaction model.

Conversation-card products can become performative, cluttered or dependent on account creation. DuoTalk needed to feel calm and immediate while keeping two devices synchronized and avoiding storage of private spoken answers.

I built a minimal two-person room flow with short join codes, independent participant tokens and an authoritative shared question state. Temporary Redis-backed rooms and HTTPS polling support the deployed experience while the interface stays focused on the current question.

Product strategy, UX/UI design, interaction design, front-end development, server architecture, synchronization logic and test design.

Temporary two-person rooms with six-character codes

Synchronized question progression across devices

Portuguese and English interfaces selected per device

1,464 original questions in each language with shared IDs

Category-balancing question engine

Reconnection and simultaneous-advance handling

Warm neutral space, a single terracotta accent and friendly typography keep the experience calm. The absence of accounts, chat and stored answers is a deliberate privacy and focus decision.

React 19, Vite, TypeScript, Tailwind CSS 4, Motion, Express 5, Socket.IO, Upstash Redis, Zod, Vitest and Playwright.

A live bilingual web application with a tested synchronization model for temporary two-person rooms. The product is intentionally scoped and does not store or analyze spoken responses.