Senior Fullstack Engineer - Messaging Platform

Responsibilities

• Build and evolve Quicksilver UI, Spotify's multi-channel messaging platform, where operators author, preview, and deliver in-app messages, emails, and push notifications across markets and locales.
• Own frontend features end-to-end, from component design and implementation in React and TypeScript through server-side creative rendering.
• Work across the stack when needed, including debugging Java and Apollo services, evolving gRPC, Protobuf, and REST API contracts, tracing data through BigQuery, and improving pipeline output.
• Support multi-market and localization workflows, helping creatives render reliably across locales and enabling smooth new-market launches.
• Partner with product and design to shape features and improvements based on operator needs.
• Improve the developer experience through stronger testing infrastructure, build performance, component documentation, and integration tooling.
• Contribute to architectural decisions and technical direction as the platform evolves.

Languages