Senior Backend Developer - E commerce

At Loblaw Digital, we know that our customers expect the best from us. Whether that means building the best, most innovative online shopping experience, or designing an app that will impact the lives of people across the country, we’re up for the challenge. From our office in Downtown Toronto, we’ve created leading eCommerce experiences in the online grocery shopping, beauty, pharmacy, and apparel spaces, and we’re only just getting started.

At Loblaw Digital, we know that our customers expect the best from us. Whether that means building the best, most innovative online shopping experiences, or designing an app that will impact the lives of people across the country, we’re up for the challenge. Loblaw Digital is the team responsible for building and operating the online businesses of Canada’s largest and most successful retailer.

Based in downtown Toronto, we are an entrepreneurial, fast‑paced, and collaborative team working towards transforming the way Canadians shop by creating leading eCommerce experiences in the online grocery shopping, beauty, pharmacy, loyalty, and apparel spaces, and we’re only just getting started! To achieve these goals, we are looking for talented and passionate individuals who want to collaborate and solve challenging problems and make a significant and lasting impact on Canadians.

• Own and evolve core backend services in the Customer Identity domain, including authentication flows, authorization enforcement, session management, and identity lifecycle orchestration
• Design, develop, test, and maintain cloud‑native microservices that are secure, scalable, and highly available
• Build and operate services that integrate with an external identity provider, extending platform capabilities through APIs, middleware, configuration, and custom logic
• Make pragmatic architectural decisions, clearly articulating trade‑offs related to security, performance, scalability, reliability, and developer experience
• Translate product and platform roadmaps into well‑scoped technical designs and execution plans
• Lead investigation and resolution of complex identity‑related production issues, including on‑call participation, incident response, and post‑incident reviews
• Establish and continuously improve observability (metrics, logging, tracing, alerts) to ensure operational excellence
• Act as a technical steward for code quality, architecture, and long‑term maintainability
• Mentor and support junior developers through code reviews, design discussions, and hands‑on collaboration
• Collaborate closely with frontend, mobile, security, and infrastructure teams to deliver cohesive end‑to‑end identity experiences
• Proactively identify technical debt, risks, and gaps in requirements, and work with stakeholders to address them early

• Extensive experience with Java, Kotlin, or similar backend programming languages
• Strong experience building distributed, cloud‑native microservices
• Hands‑on experience with event‑driven architectures and asynchronous systems
• Professional experience with GCP, AWS, or Azure
• Experience working with relational and No
  
  SQL databases at scale
• Strong understanding of caching strategies (e.g., Redis), including cache invalidation and consistency trade‑offs
• Proven experience operating observable systems and diagnosing performance, scalability, and reliability issues in production

• Experience integrating with enterprise identity providers, rather than building authentication systems from scratch
• Strong understanding of authentication and authorization concepts such as OAuth 2.0, OpenID Connect, tokens, sessions, scopes, and entitlements
• Experience designing identity orchestration layers, middleware, or gateways between clients, identity providers, and backend services
• Comfortable working within vendor constraints and extending platforms through configuration, APIs, and custom services
• Familiarity with secure session handling, token refresh, logout flows, and cross‑application identity consistency

• You take ownership of systems…