Senior Fullstack Engineer (React, Python)

TL;DR

Senior Fullstack Engineer (React, Python): Developing end-to-end client features and complex ad-tech integrations for a retail analytics B2B SaaS platform with an accent on scalable system design and UI experience. Focus on building distributed systems, integrating with Meta, TikTok, and Snapchat, and enhancing enterprise dashboards.

Location: Hybrid in Toronto, Canada (95% remote, monthly meetups). Must be legally authorized to work in Canada; sponsorship is not provided.

Salary: CA$130,000 – CA$180,000 per year + Equity

Company

A profitable B2B SaaS retail analytics platform that helps brands understand retail data and run targeted media campaigns.

What you will do

• Lead end-to-end client feature development from design to delivery.
• Implement complex integrations with major ad-tech platforms including Meta, TikTok, and Snapchat.
• Enhance the UI/UX experience for enterprise client dashboards.
• Architect and build scalable distributed systems deployed via public cloud (Azure).
• Maintain high code quality by writing test suites with 85%+ coverage and managing CI/CD pipelines.

Requirements

• 6+ years of experience building enterprise-level B2B/B2C SaaS applications.
• Strong proficiency in JavaScript, TypeScript, React, and Python.
• Proven track record of owning application features from zero to one.
• Deep understanding of scalable system design for web-based APIs.
• Legal authorization to work in Canada (no visa sponsorship).
• Previous startup experience working within small teams with high ownership.

Nice to have

• Experience in Adtech or Martech domains.

Culture & Benefits

• Equity and options grants.
• Comprehensive health insurance plan available from day one.
• Flexible remote work policy with monthly team meetups and biannual retreats.
• Professional growth through coaching and mentoring.
• Meritocratic environment with leadership opportunities as the company scales.