Senior VS Code Extension Developer — ADE Tooling (DeDot/ADE Team)

Full-time position

Key Responsibilities

Design, develop, and maintain the ADE VS Code extension for mainframe application development
Build and extend reactive webview UIs using Svelte within the VS Code extension framework
Implement and maintain message-passing protocols between extension host and webviews
Lead architectural decisions and drive technical solutions end-to-end
Contribute to the FastAPI REST backend and PostgreSQL data layer as needed
Take ownership of features from development through production
Mentor team members and help shape engineering culture through best practices
Align with product owners and team members on business requirements
Apply best practices like CI/CD, automated testing, and code quality tooling
Work and collaborate within international projects
Proven team player with strong communication skills

Strong knowledge of the following technologies:

TypeScript and Node.js — VS Code Extension API, extension host, webview sandbox, IPC message protocols
Python 3.11+ — FastAPI, async patterns, Pydantic
Strong grasp on Linux/Bash/Perl scripting
Svelte and Vite — Reactive UI development for VS Code webviews
VS Code Extension development — Command registration, tree views, settings, packaging (VSCE)
AI-assisted development — Hands-on experience with Claude Code (Anthropic) or equivalent tools for day-to-day coding workflows
REST API consumption — HTTP fetch, JWT Bearer auth, OpenAPI, PostgREST

Good working knowledge:

Nice to have: