python backend engineer jobs in Toronto

At Affi, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. The Streaming team at Affi is responsible for all things data and drives the strategy for event driven architecture, stream processing, data exploration, discovery and validation....

At Affim, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. As we build Affim's advertising platform and evolve Marketplace into a best in class shopping destination, the ability to route and discover is one of the greatest levers for...

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,...

Location: Toronto (Hybrid preferred, remote possible for strong candidates). This is a full-stack role with a strong backend focus. About Micromart Micromart is building the platform for unattended retail. We empower entrepreneurs to turn any location into a retail opportunity, from offices and condos to gyms, hotels, and other shared spaces. Our focus...

Design reliable backend systems with Python or Go at Tucows Domains, working remotely from Canada on APIs, databases, and production software. As a Senior Backend Software Engineer, you will build and maintain services supporting Tucows Domains products. This hands-on individual contributor role provides technical direction across multiple systems while...

Build Authentication as a Service at eBay with Java, Spring Boot, REST, and cloud infrastructure expertise. Work on scalable backend systems. As a Senior Software Engineer, you will develop production-grade backend services for authentication workflows. You will shape architecture, infrastructure, and deployment foundations for a reusable platform extending...

Independently own larged-scoped projects from initial discovery through launch with a focus on outcomes and customer impact Collaborate with a cross functional team to find solutions to customer challenges Improve the performance, reliability, and scalability of our existing systems Promote engineering excellence through technical leadership,...

Build scalable revenue systems with Vivid Seats as a Senior Software Engineer on the Orders team, using Java, Python, or Node.js. This hybrid role includes three in-office days weekly. You will develop and support production web applications powering Vivid Seats’ online ticket marketplace. The senior position emphasizes backend technologies, modern web...

Affirm, Inc. is seeking a senior engineer to own workload safety standards for its EKS fleet and drive end-to-end enforcement across the organization. You will lead design reviews, mentor engineers, and advance automation and guardrails to keep workloads compliant from day one. The role emphasizes deep Kubernetes expertise, Go or Python proficiency, and a...

Toronto, ON - Hybrid (2-3 Days WFO)6-12 months We are looking for a Senior QA Automation Engineer to build and execute automated test frameworks using Python and Playwright in the trading applications domain Contract QA role focused on hands-on test framework development, test case design, and component-level validation for trading systems. Must Haves 10+...

Seeking a Senior ML Engineer with expertise in GenAI, MLOps, and Python for project-based roles in Canada. Requires 5+ years of experience in machine learning and strong Python programming skills.

Develop scalable data pipelines and products, working with cross-functional teams to integrate and transform data from various platforms.

Freelance Machine Learning Engineer designing computational problems, using Python, and contributing to advanced AI projects remotely.

Seeking a Senior Backend Engineer in Toronto to build scalable backend systems for a fintech firm, focusing on financial data and cloud-native platforms. Requires Python/Rust experience.

Seeking a Software Engineer to develop and maintain cloud-based products and services, integrating with external systems. Responsibilities include writing code, performing reviews, and optimizing performance for large-scale distributed systems.

Seeking a Senior Backend Engineer with an AI-first mindset to design and implement core backend systems for a new SaaS application using .NET/C#, Event Sourcing, CQRS, DDD, and AWS.

Senior Software Engineer for Airwallex's Global Treasury and Payment Network team. Focus on leading strategy, architecture, development, and operation of financial solutions, collaborating with product teams to launch finance products and drive data-informed decisions.

Seeking a Lead Software Engineer for a critical security settlement platform, focusing on building a resilient, scalable, and secure distributed system. Responsibilities include driving architecture, writing clean code, mentoring junior developers, and ensuring end-to-end system ownership.

Seeking a remote Backend Engineer to design and launch backend systems for consumer onboarding and management using Python or Kotlin.

Senior Backend Engineer to lead the design and delivery of AI-powered SaaS products, integrating data/ML/AI features into customer workflows and driving engineering best practices.