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
- Backend engineer building Node.js and TypeScript edge systems for Micromart’s unattended retail platform. Integrating hardware and operating reliable smart-store software.
Responsibilities
- Design, build, and maintain Node.js and TypeScript services running on edge devices
- Build and operate Express-based services deployed in Docker on Linux
- Work on real-time systems using sockets and event-driven architectures
- Integrate with cameras, payment devices, locks, routers, sensors, and other hardware
- Work with USB and other device protocols, networking, IP addressing, and connectivity constraints
- Build systems that handle real-time events, intermittent connectivity, and offline scenarios
- Investigate and resolve issues across application code, operating systems, networking, and hardware
- Debug camera recording pipelines and other performance-sensitive workloads
- Improve observability, logging, and monitoring for systems running in production
- Collaborate closely with platform, frontend, and hardware teams
- Make pragmatic tradeoffs that prioritize stability, simplicity, and long-term maintainability
- Take ownership beyond writing code, including code reviews, release follow-through, and raising the quality bar across the team
Requirements
- Strong experience building and owning production software systems
- Solid fundamentals in systems design, debugging, and software architecture
- Experience with Node.js, TypeScript, and service-based architectures
- Experience building real-time systems using sockets or event-driven patterns
- Comfort working with Linux-based systems, containers, and device-level software
- Experience integrating with hardware or external devices using USB, network protocols, or similar interfaces
- Strong understanding of networking fundamentals, including IP addressing and local networks
- Ability to reason about performance, reliability, and observability in long-running systems
- Comfort working close to hardware and physical constraints
- A strong sense of ownership and initiative, with a desire to improve systems and team quality over time
- Nice to have: experience with edge computing, IoT, or connected device platforms
- Nice to have: experience working with Linux or Android-based devices
- Nice to have: experience with cameras, vision systems, or video recording pipelines
- Nice to have: experience with Balena or similar device management platforms
- Nice to have: experience with React or React Native
- Nice to have: background in startups or small teams where ownership mattered more than process
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 the 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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