Senior Software Engineer – Recommendations Team

Avenue Code; Toronto; On-site; CAD 100,000 - 130,000; Full time

Job summary

Join a leading company shaping the future of global e-commerce as a Senior Software Engineer in Toronto. You will work on large-scale, data-driven systems that enhance user experiences, collaborating with a multidisciplinary team to impact customer satisfaction and drive business outcomes. Responsibilities include designing scalable systems, guiding technical decisions, and mentoring junior engineers.

Qualifications

• 8+ years experience or 6+ years with a MS.
• Experience in OOP and functional programming.
• Familiarity with containerization and cloud infrastructure.

Responsibilities

• Design and implement scalable, resilient systems.
• Contribute to the software development lifecycle.
• Mentor and support junior engineers.

Skills

System architecture

Distributed systems

Java

Scala

Data-driven applications

Big data technologies

Technical leadership

Education

BS / BA in Computer Science

MS in Computer Science

Job description

Senior Software Engineer – Recommendations Team

Senior Software Engineer – Recommendations Team

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About The Opportunity

This is a unique opportunity to be part of a team that’s shaping the future of global e-commerce. You'll work on one of the most heavily trafficked platforms in the world, collaborating with a multidisciplinary team to build large-scale, data-driven systems that deliver personalized experiences to millions of users.

About The Opportunity

This is a unique opportunity to be part of a team that’s shaping the future of global e-commerce. You'll work on one of the most heavily trafficked platforms in the world, collaborating with a multidisciplinary team to build large-scale, data-driven systems that deliver personalized experiences to millions of users.

As part of the Recommendations team, you will have a direct impact on how users discover products, improving both customer satisfaction and business outcomes. We foster a culture of innovation, authenticity, and continuous learning — where bold ideas are encouraged and every voice matters.

Responsibilities

• Design and implement scalable, resilient, high-performance distributed systems that enhance customer experience
• Contribute to all stages of the software development lifecycle, from concept to production
• Influence and guide architectural and technical decisions within the team
• Anticipate changes in requirements and design solutions that support adaptability and fast iteration
• Collaborate closely with engineers, product managers, researchers, and analysts to deliver high-impact features
• Create detailed design documentation and participate in technical design and code reviews
• Communicate engineering decisions and trade-offs clearly across cross-functional teams
• Identify technical gaps and bottlenecks, propose solutions, and help define the engineering roadmap
• Mentor and support junior engineers, and contribute to the team's hiring efforts
• Lead by example, fostering a high-performance engineering culture

Required Qualifications

• BS / BA in Computer Science or related field with 8+ years of experience, or MS with 6+ years
• Strong knowledge of system architecture, distributed systems, data structures, algorithms, and both OOP and functional programming paradigms
• Proficient in Java and / or Scala, with solid experience developing RESTful web services
• Strong background in building data-driven applications using RDBMS and NoSQL databases
• Demonstrated experience designing and developing scalable, fault-tolerant systems for large-scale web platforms
• Hands-on experience with big data technologies such as Spark, Flink, and Kafka
• Minimum 5 years working on large-scale, distributed platforms / APIs, with at least 2 years in a technical leadership role
• Proven ability to deliver in fast-paced, collaborative environments
• Strong sense of ownership and accountability for delivering high-quality solutions

Nice To Have Skills

• Familiarity with capability-oriented architecture and low latency APIs
• Exposure to A / B testing frameworks and experimentation pipelines
• Prior experience with recommendation systems or personalization at scale
• Understanding of CI / CD pipelines, containerization, and cloud infrastructure
• Contributions to open-source projects or technical communities

Seniority level

Seniority level

Mid-Senior level

Employment type

Employment type

Full-time

Job function

Job function

Engineering and Information Technology

IT Services and IT Consulting

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