Senior backend engineer owning high - availability identity and authentication systems. Leading delivery, reliability, technical standards, and talent development for Affirm’s pay - over - time platform.
About the role
- Senior Backend Engineer scaling Micromart’s unattended retail platform. Building reliable systems for payments, fraud prevention, devices, and real-time commerce workflows.
Responsibilities
- Design, build, and maintain backend systems
- Work on product integrations, operational tooling, and reliability improvements across backend services, APIs, and supporting systems
- Work on payment systems, fraud prevention, device management, and real-time services
- Build and evolve internal tools and workflows used by operators and internal teams
- Own systems end to end, from design and implementation through deployment and production support
- Collaborate closely with product, frontend, and smart store teams
- Make pragmatic tradeoffs that prioritize clarity, quality, and long-term maintainability
Requirements
- Strong experience building, owning, and operating production software systems
- Experience working within large codebases or monorepos and improving architecture incrementally over time
- Solid backend and systems fundamentals, including Node.js, TypeScript, and relational databases such as Postgres
- Experience working across the stack, including modern frontend frameworks such as React
- Familiarity with modern SDLC practices, including CI/CD, automated testing, code reviews, and building secure, production-quality systems
- Comfort working through ambiguity and real-world constraints
- Experience with payment systems and financial workflows is nice to have
- Experience with platforms, infrastructure, or distributed systems is nice to have
- Experience building systems that interact with real-world devices or real-time events is nice to have
- Background in startups or small teams where ownership mattered more than process is nice to have
Benefits
- Competitive salary and equity
- Health, dental, and vision benefits for employees and dependents
- Monthly fitness or wellness stipend
- Hybrid work environment, with access to our Toronto office
- Meals provided when working from the office
- Centrally located downtown office near Union Station
Job title
Job type
Experience level
Salary
Not specified
Degree requirement
No Education Requirement
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