Senior Fullstack Engineer (TypeScript), AI Engineering: Editor Extensions

Role Overview

Senior Fullstack Engineer on AI Engineering: Editor Extensions (Multi-Platform team). You will design and build tools that bring GitLab Duo into developers’ daily workflows across Duo CLI, JetBrains IDEs, the terminal, and other multi-platform interfaces. The role blends senior fullstack engineering with AI-powered developer tooling, and includes architectural ownership plus technical leadership.

Responsibilities

• Lead the design and implementation of multi-platform editor extensions for GitLab Duo, from discovery through rollout and iteration.
• Design, build, and operate TypeScript/Node.js services for the GitLab Duo CLI, including interactive terminal experiences with strong reliability, observability, and performance.
• Develop and evolve a JetBrains IDE plugin in Kotlin using the IntelliJ Platform SDK.
• Implement and improve features in the GitLab Language Server to deliver consistent AI-assisted workflows across editors and platforms.
• Build modern, accessible UI components using Vue 3, shadcn-style component libraries, and Tailwind-based theming.
• Shape multi-platform architecture: reduce technical debt, improve scalability, and enhance developer experience.
• Collaborate with product, design, and engineers across AI Engineering to align technical decisions with the multi-platform strategy.
• Champion product quality, security, performance, and developer experience via high-quality reviews, mentorship, and shared standards across TypeScript and Kotlin codebases.

Requirements & Qualifications

• Strong proficiency with TypeScript (including fullstack capabilities in frontend and backend).
• Experience designing/building/operating multi-platform tooling and services.
• Ability to provide technical leadership by breaking down complex problems, aligning on long-term direction, and maintaining a high bar for code quality, performance, and reliability.

Nice-to-Haves (from the posting)

• Experience contributing to Kotlin-based JetBrains plugins using the IntelliJ Platform SDK.
• Experience with Vue 3 component development and Tailwind-based theming.
• Familiarity with language server concepts and editor extension development.

Example Projects

• Duo CLI
• GitLab Language Server
• GitLab Duo plugin for JetBrains IDEs