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Zeffy
Staff Software EngineerZeffy • Montreal (administrative region), QC, Canada
Staff Software Engineer

Staff Software Engineer

Zeffy • Montreal (administrative region), QC, Canada
30+ days ago
Job type
  • Full-time
Job description

About Zeffy

Zeffy is the fastest-growing nonprofit platform in North America, helping organizations raise funds, run events, and engage donors.

About The Role

As a Staff Software Engineer at Zeffy, you’ll work on key product features while playing a central role in elevating the engineering team. You’ll bring experience that helps others make better technical decisions, navigate complexity with confidence, and maintain our focus on building simple, high-quality solutions as we grow.

Development Principles at Zeffy

  • We always optimize the ratio impact / effort, calling it Zeffy perfectionism.
  • We build the simplest solution first to validate ideas quickly, keeping the codebase clean without solving problems that don’t exist yet.
  • We are organized in 2‑month cycles to prioritize radically, setting targets on efficiency, security, stability, and performance.
  • Trust and ownership: every target is clear and owned by one person with full autonomy, not working alone.
  • Continuous improvement: we regularly review and refine our processes, promoting a culture of learning and growth.

Our Stack

  • Frontend: React/Next.js (TypeScript)
  • Backend: Nest.js (TypeScript)
  • Database: PostgreSQL, Algolia
  • CI/CD: GitHub Actions, Cypress

Preferred Experience (Qualifications)

  • You have at least 8 years of experience as a developer in SaaS or web‑based products that serve high‑volume and rapidly growing user bases.
  • You’ve shipped complex products at scale, learned from real‑world successes and failures, and developed sharp judgment about what truly matters.
  • You bring seniority through expertise and perspective rather than hierarchy, making clear, pragmatic decisions that balance speed, quality, and long‑term thinking.
  • You value clarity over cleverness, simplicity over complexity, and momentum over perfection.
  • You mentor others with empathy, share your experience generously, and elevate the work of the whole team without adding unnecessary process.

What’s in it for you

  • 4 weeks holiday + 1 week during Christmas time
  • Competitive stock option program
  • Health insurance (including dental plan)
  • Online Medicine with Dialogue
  • RRSP (REER) program
  • Allowance for ecological transport (bike, transit)
  • Wellness Budget
  • Team volunteering four times per year
  • Offsite summit once a year with the entire team
  • Offices located in the heart of Plateau Mont‑Royal, with flexible, hybrid work possibility

Recruitment Process

  • Call with Recruiter (45 min)
  • Meeting with Hiring Manager (1.5h)
  • Case Study (2h)
  • Cultural interview with leadership (1h)
  • Team lunch & Reference check
  • Job offer
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Staff Software Engineer • Montreal (administrative region), QC, Canada

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