Reliability Jobs in Toronto, ON

At eBay, we're more than a global ecommerce leader — we’re changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. We’re committed to pushing boundaries and leaving our mark as we reinvent the future of ecommerce for enthusiasts.

Our customers are our compass, authenticity thrives, bold ideas are welcome, and everyone can bring their unique selves to work — every day. We're in this together, sustaining the future of our customers, our company, and our planet.

Join a team of passionate thinkers, innovators, and dreamers — and help us connect people and build communities to create economic opportunity for all.

About the Team

The Unified Feature Store (UFS) team at eBay, part of the Golden Data Sets (GDS) initiative, is building the next generation of eBay's AI and decisioning platform. We are developing a declarative, self-service platform that enables engineers to define, discover, compute, validate, and serve features consistently across both training and real-time inference. Our mission is to eliminate feature duplication, ensure training-serving parity, and provide reliable, scalable, and low-latency feature infrastructure that powers fraud detection, payments, search, personalization, and other mission-critical experiences across eBay.

About the Role

We are seeking a Senior MTS, Software Engineer to help shape the architecture and technical direction of eBay's Unified Feature Store. In this role, you will design and build the distributed systems that power feature computation, storage, serving, and lifecycle management at massive scale. Your work will directly improve developer productivity, accelerate AI model delivery, and establish UFS as the single source of truth for feature engineering across eBay.

This is a platform engineering role—not an ML model development or application engineering role. While familiarity with feature stores, stream processing, and data infrastructure is valuable, your primary focus will be on building the distributed platform itself, solving challenging problems in scalability, consistency, reliability, and low-latency serving.

If you're passionate about large-scale distributed systems, backend infrastructure, platform architecture, and solving hard scalability problems, this is the right team for you.

What You'll Accomplish

• Own the architecture, design, and development of large-scale distributed services that power eBay's next-generation AI and decisioning infrastructure.

• Develop core platform services for stream processing, state management, feature serving, and distributed computation with strong guarantees around correctness, consistency, and low-latency.

• Solve challenging distributed systems problems involving exactly-once processing, fault tolerance, scalability, online/offline consistency, and high-throughput data processing.

• Build reusable platform frameworks, runtimes, and self-service tooling that simplify complex distributed workflows for thousands of engineers.

• Drive technical decisions around scaling, reliability, consistency, partitioning, idempotency, fault isolation, and graceful degradation.

• Improve observability, alerting, incident response, root-cause analysis, and operational readiness for critical platform services.

• Lead capacity planning, performance tuning, and cost-efficiency efforts for high-throughput distributed systems.

• Develop automation and tooling that reduce operational toil and improve deployment, debugging, and recovery workflows.

• Partner with engineering and product stakeholders to translate broad platform requirements into durable technical solutions.

• Lead design reviews, mentor engineers, and raise the technical bar for distributed systems engineering across the team.

• Identify architectural debt, scaling bottlenecks, and reliability gaps, and drive pragmatic modernization efforts.

What You Bring

• BS in Computer Science, Computer Engineering or a related field with 10+ years of industry experience (or MS with 8+ years) building large-scale distributed backend systems or platform infrastructure.

• Proven experience designing and operating high-throughput, low-latency, production-grade distributed services with demanding reliability and scalability requirements.

• Deep understanding of distributed systems fundamentals, including partitioning, replication, consistency models, concurrency, retries, idempotency, deduplication, backpressure, leader election, and failure recovery.

• Strong software engineering skills in Java, Python, Go, Scala, C++, or another production-grade language.

• Experience building platform services, frameworks, APIs, libraries, or runtime infrastructure that are consumed by multiple engineering teams.

• Hands-on deep internal expertise in several of the following: Kafka/Flink, Spark, Delta/Iceberg, GraphQL/REST APIs, RDBMS/NoSQL.

• Hands-on experience operating production systems, including observability, performance tuning, debugging, incident response, on-call ownership, and driving long-term reliability improvements.

• Demonstrated ability to make sound architectural trade-offs across correctness, reliability, scalability, performance, operability, developer productivity, and cost.

• Experience designing clean interfaces, managing backward-compatible migrations, and executing safe rollout strategies for platform systems.

• Strong communication and technical leadership skills, with a track record of leading design discussions, mentoring engineers, influencing cross-functional teams, and raising the engineering bar.

Senior MTS Software Engineer, Data Platform

Company: eBay

Location: Toronto

Job Type: Full-time

About eBay

eBay is a global commerce leader that connects millions of buyers and sellers around the world. We empower people and create economic opportunities for individuals, businesses, and communities. We're driven by a vision to create a more sustainable form of commerce that benefits the environment and society as a whole. Join us as we continue to innovate and shape the future of e-commerce.

Additional Details

This job posting relates to an existing vacancy within eBay.

eBay is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, sex, sexual orientation, gender identity, and disability, or other legally protected status. If you have a need that requires accommodation, please contact us at . We will make every effort to respond to your request for accommodation as soon as possible. View our to learn more about eBay's commitment to ensuring digital accessibility.

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