Sr. Backend Developer (Java/Spring Boot) to build greenfield e-commerce platforms across Grocer[...]

S I Systems; Toronto; Hybrid; CAD 100,000 - 130,000; Full time

Job summary

A major Canadian retailer in Toronto is seeking a Sr. Backend Developer to build greenfield e-commerce platforms. You will develop microservices for pricing, promotions, and order management, and work with event-driven systems. The ideal candidate has over 7 years of experience in Backend Development, specifically with Java and Spring Boot. This is a hybrid role with one day a week onsite required.

Qualifications

• 7+ years of experience in Backend Development with Java and Spring Boot.
• Experience with GCP and its tools.
• Strong understanding of development workflows including TDD and CI/CD.

Responsibilities

• Develop microservices for pricing, promotions, and order management.
• Architect event-driven systems for scalable processing.
• Define data models to support operational needs.
• Support integrations with 3rd-party partners.

Skills

Backend Development

Java

Spring Boot

Microservices architecture

TDD

CI/CD

Automated testing

Tools

GCP

BigQuery

BigTable

Pub/Sub

Job description

Sr. Backend Developer (Java/Spring Boot) to build greenfield e-commerce platforms across Grocery, Pharma, and Apparel business domains

Our client is Canada's largest retailer. They are looking for a Sr. Backend Developer (Java/Spring Boot) to build greenfield e-commerce platforms across Grocery, Pharma, and Apparel business domains.

They are launching 5+ new applications this year, and you’ll have a direct role in architecting these services. You’ll build resilient, scalable microservices that support web applications used by millions of Canadians.

Duration: Until End of December 2025, to start

Location: Toronto (Bathurst and Lakeshore) - 1 day/week onsite mandatory

Responsibilities:

• Develop microservices that support pricing, promotions, order management, and fulfillment workflows
• Architect event-driven systems for scalable, real-time processing using cloud-native tools
• Define and evolve data models and schemas to support new product and operational needs
• Support integrations with 3rd-party partners such as DoorDash and internal fulfillment systems
• Optimize service performance, latency, and availability in a high-traffic environment
• Work cross-functionally to design clean, consistent APIs for frontend and mobile consumption
• Participate in sprint planning, code reviews, and continuous deployment workflows

Must Have Skills:

• 7+ years of experience in Backend Development, with strong Java, Spring Boot, and microservices architecture
• Experience working with GCP, especially BigQuery, BigTable, and Pub/Sub
• Strong understanding of TDD, CI/CD, and automated testing