case study

Razzify

2025

A native-feeling Spotify desktop client packaged with Tauri 2 — Rust shell, React UI, Web Playback SDK for in-app device control.

The Web API powers library and discovery; the Web Playback SDK runs in-process for native playback. A singleton token-refresher collapses concurrent 401s into a single in-flight refresh, so playback never stutters mid-track. Migrated from Electron to Tauri for a much smaller binary.

DesktopmacOS · Windows · LinuxRust + ReactOpen source

⬡ view on github

Razzify desktop client — playlist view, light theme

architecture

How It Works

Tauri 2 wraps the React app in a Rust shell that opens a native window and handles IPC. The Spotify Web API (queries, library, discovery) is consumed via RTK Query for caching and dedupe; the Web Playback SDK runs in-process to register a device, receive state events, and forward playback controls. A single token-refresh singleton serializes 401 recovery so simultaneous failing requests share one refresh.

// api + sdk + token refresh

tauri 2 shell (rust)

React App

↓

Token refresh singleton

serializes concurrent 401s

↓

Spotify Web API

library · discovery\nvia RTK Query

Web Playback SDK

in-process device\nplay · pause · skip

stack

Tech Stack

Frontend

React 19 · TypeScript

Components

Mantine UI · Lucide icons

State

Redux Toolkit · RTK Query · Redux Persist

Auth

Spotify OAuth 2.0 · singleton token-refresh layer

Player

Spotify Web Playback SDK · device_id management

Data

Spotify Web API (REST) via RTK Query

Bundler

Vite · Vitest

Shell

Tauri 2 (Rust backend) — small native binary

features

Key Features

OAuth sign-in with refresh tokens persisted across restarts

Top tracks and artists with 4-week / 6-month / all-time filter

Recently played timeline

In-app playback — play, pause, skip, seek via the Playback SDK

Playlist browsing with drill-in to full track listings

Album and artist detail pages

New releases and discovery feed

Theme and accent color customizer

Native window via Tauri — tiny binary compared to Electron