Senior Desktop Engineer (Electron.js)

Ruby Labs is a leading tech company that creates and operates innovative consumer products across health, education, and entertainment industries.

• 6+ years of software engineering experience including production-grade TypeScript/Node.js.
• 3+ years building and shipping Electron applications to end users.
• Hands-on native macOS development in Swift and/or Objective-C, with AppKit and system-level frameworks like Core Audio, AVFoundation, ScreenCaptureKit, or Accessibility API.
• Experience writing native Node addons (N-API, node-addon-api) or out-of-process native helpers.
• Experience with macOS code signing, notarization, entitlements, and TCC permission model.
• Working knowledge of Windows desktop platform: Win32 APIs, Authenticode signing, SmartScreen, and antivirus reputation.
• Strong understanding of multi-process architecture, IPC, and debugging user-specific issues.

Nice to have:

• Experience with real-time audio pipelines including buffering, resampling, mixing, or streaming to speech-to-text.
• CI signing with hardware-backed certificates (Azure Key Vault, DigiCert KeyLocker) and antivirus whitelisting.
• Experience with auto-update infrastructure like Squirrel, electron-updater, or Sparkle.
• Crash reporting and native code symbolication experience (Crashpad, Sentry).
• Prior experience shipping consumer desktop products at scale.

Desktop Application & Engineering Quality:

• Own the Electron architecture end to end including main, renderer and helper processes, IPC design, context isolation, and process lifecycle.
• Build transparent, frameless, always-on-top overlay windows with global shortcuts and low-latency UI.
• Design platform abstraction in TypeScript and write idiomatic Swift and C++ native code.
• Maintain product reliability through defensive coding, tests, performance and security review remediation.

Native Platform Integration:

• Build and maintain native layer with Node addons (N-API, node-addon-api) and out-of-process helpers in Swift and C++.
• Implement real-time system audio capture using Core Audio, ScreenCaptureKit on macOS, and WASAPI loopback on Windows.
• Integrate with Accessibility API (AXUIElement) on macOS and UI Automation on Windows.
• Manage IPC protocol and lifecycle between Electron and native helpers.

Distribution, Permissions & Release Reliability:

• Manage code signing, notarization on macOS and Authenticode signing, SmartScreen reputation on Windows.
• Design permission onboarding for microphone, audio, screen recording, and accessibility.
• Build and maintain release pipeline including CI builds, signing from CI with HSM-backed certificates, auto-update, staged rollout and rollback.
• Own crash reporting and production telemetry and act accordingly.

Applicants must be located within ± 4 hours of the Central European Time (CET) zone to ensure optimal collaboration and communication during working hours.