Senior Desktop Software Developer

About Sync

is a leading end-to-end encrypted cloud storage platform operating at significant scale across dual data centers. We build secure privacy-first software that millions of users trust with their most important files. Our desktop applications are the front line of that trustrunning on Mac Linux and Windows syncing data reliably and securely across every platform.

The Role

Were rebuilding our desktop application from the ground up. Our current clients are built on native platform-specific stacks (C/Swift and friends) and were consolidating onto a unified modern Rust-based architecture across macOS Linux and Windowstreated as first-class equal targets.

Were looking for a Senior Desktop Software Developer to be the technical owner of this greenfield rewrite. This is a high-ownership individual contributor role: youll architect the new application define how we build and ship it and set the engineering quality bar from day one. You wont have direct reports but you will set the standard that the desktop product is measured against.

Responsibilties

• Lead a greenfield rewrite of our desktop client migrating from native platform-specific code to a unified Rust-based architecture.
• Own the complete desktop SDLCarchitecture implementation release engineering and ongoing maintenanceacross macOS Linux and Windows as equal priorities.
• Tackle the genuinely hard problems end to end: sync engine internals deep OS file-system integration and robust update/release infrastructureall of which we consider equally critical.
• Design and operate a secure auto-updater: signed delivery signature verification staged rollouts rollback and reliable cross-platform update mechanics.
• Define the quality bar for the new codebase from scratchtest strategy automated coverage CI/CD observability and crash reportingand hold the product to it.
• Manage platform-specific concerns including code signing notarization packaging background services and native shell/file-system integrations.
• Integrate our existing end-to-end encryption layer into the client ensuring cryptographic operations are correct performant and used safely.
• Use AI-assisted and agentic development tools (Claude Code Codex and similar) to accelerate delivery and help establish best practices for AI-augmented workflows across the team.
• Collaborate with product security and backend teams to ship features that scale.

Experience & Qualifications

• Significant depth in desktop application development with a track record of shipping and maintaining production software across macOS Linux and Windows.
• Strong proficiency in Rust including async patterns FFI and performance optimization.
• Hands-on experience with cross-platform desktop frameworks such as Tauri and/or Electron.
• Experience leading or anchoring a significant rewrite or greenfield buildyouve made the foundational architectural calls and lived with the consequences.
• Direct experience designing or operating auto-update systems including secure distribution and code signing/notarization.
• Ability to define a testing and quality strategy from a blank slate not just work within an existing one.
• Comfort integrating existing cryptographic libraries correctly; working understanding of E2EE concepts (AES-GCM key management client-side encryption).
• Comfort and fluency with AI coding tools and agentic workflowsyou actively use them and understand their strengths and limits.
• Ownership mindset: you treat the desktop product as yours and drive it from architecture to shipped supported software.

Nice to Have

• Experience with cloud storage file sync or backup products.
• Familiarity with native APIs such as macOS File Provider Windows Cloud Files API or Linux FUSE.
• Background migrating off native C/Swift codebases toward Rust.
• Experience contributing to or maintaining open-source Rust projects.

Why Sync

• Own a from-scratch rewrite of a core product surfacerare scope for an IC.
• Work on privacy-first software that genuinely protects users.
• High autonomy and real architectural influence.
• A team that embraces modern AI-augmented engineering.
• Competitive compensation benefits and flexibility.

Perks and Compensation

Compensation

• Base salary: CAD $160000 $175000 depending on experience skills and location.

Benefits

• Comprehensive health benefits
• Flexible remote work
• Opportunity to lead the technical direction of a flagship desktop product
• High-impact work on a platform trusted by millions of users
• A profitable privately held company investing in long-term product innovation

Thank you for considering this opportunity. Senior Recruiters partner exclusively with Startups and are in direct communication with hiring managers and founding team members.

uses AI-assisted tools as part of our candidate sourcing and screening process. All applications are reviewed by a human recruiter who makes all decisions about which candidates to your application seems like a good fit for the position a real member of our team will contact you soon!