Fullstack Engineer (TypeScript), AI Engineering: Duo Client SDK

Job summary

Responsibilities

As a Fullstack Engineer on the Duo Client SDK team at GitLab, you'll build the shared foundation for every GitLab Duo client. Today, the logic that powers Duo in editors lives inside the GitLab Language Server.

• Develop secure, well-tested, and performant TypeScript features that solve technical problems of moderate scope and complexity.
• Ship small features and improvements with minimal guidance, writing tests with every merge request and contributing to code reviews and design discussions.
• Extract and publish TypeScript packages from the GitLab Language Server, migrating consumers incrementally so no parallel implementation is left to drift.
• Design durable public APIs with clear interfaces, semantic versioning, changelogs, and deprecation paths for external consumers.
• Build isomorphic core packages that isolate platform-specific behavior in adapters at the edges.

What they're looking for

• Strong proficiency with TypeScript across frontend and backend systems, including experience building and maintaining Node.js services.
• Experience with modern build and packaging tools, including monorepos, multi-module builds, ECMAScript modules (ESM), and dependency management.
• Experience with Vue 3 and the Composition API, or comparable component-based frontend experience and a willingness to learn Vue.
• Experience designing APIs that other people use, with the ability to explain what you'd do differently.
• Understanding of the differences between running code in Node.js and in the browser, and how to write code that works in both.

Tech stack

• TypeScript
• Node.js