python backend engineer jobs in Montreal

Sardine is seeking a backend-focused Senior Software Engineer to design, build, and maintain scalable APIs and services across our engineering teams. You will contribute to large-scale features, improve internal tooling, and help shape product and technical roadmaps in a fast-growing fintech environment.Ideal candidates have 7+ years in web backend...

Affirm, Inc. is building the next generation of customer identity and authentication. This remote-first role sits in Information Security, contributing to core CIAM capabilities that protect customers and support growth.You will help build backend services powering registration, login, authorization, and account lifecycle across B2C and B2B experiences,...

At Aff, 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 Capacity Modeling team ensures Aff**irm can safely handle forecasted traffic—especially during peak sales events—by translating demand forecasts into concrete, testable...

A technology consulting company is seeking a Senior Backend Engineer (AWS) to design and implement robust backend systems. This role involves working with AWS cloud services and Kubernetes, as well as managing infrastructure using Terraform. The ideal candidate will have over 5 years in backend development, proficiency in Python, and excellent...

Affirm’s engineering team is building large-scale, fault-tolerant, global infrastructure shared across multiple financial products, merchants, and vendors. Making this infrastructure transparently available to all engineers is critical to the business. The engineering culture emphasizes blameless postmortems, detailed technical specifications, and...

The Batch Developer Experience team makes batch development and testing faster and more reliable at affirmAs a developer on this team you will partner with product and infrastructure engineers to build the tools and systems that streamline workflows, strengthen testing and ultimately improve the reliability of affirm’s critical batch workloadsWith the...

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. The Data and Storage Services team is responsible for affirm's data infrastructure across OLTP and OLAP systems, spanning critical online checkout databases, batch orchestration,...

Autodesk, Inc. in Montreal is seeking a Software Java Developer to help build the next generation of cloud services, data platforms, and AI-powered capabilities that support Autodesk products and customers worldwide. You will design, develop, and evolve scalable services and platform capabilities, working with engineers, architects, product managers, and UX...

EXFO Inc. is seeking a Senior Backend Software Developer to design, develop, and evolve backend services powering its fiber monitoring platforms. You will work on distributed systems, API-driven services, and data pipelines in production-scale environments. The role emphasizes autonomy, end-to-end ownership, and collaboration with Product, QA, and DevOps...

Affirm, Inc. is seeking a senior backend engineer to design and guide the next era of scalable systems from a Canada-based remote role.You will drive architecture decisions and work with cross-functional teams to ensure reliability in a financial ledgering context. You will lead architecture decisions, collaborate with product, design and analytics to ensure...

Affirm, Inc. is seeking a software engineer to help build backend systems at scale in a remote-capable role across Canada. You will work with JavaScript/TypeScript and Python or Kotlin, delivering clear, tested, and extensible code within a multi-component environment.The role emphasizes ownership, collaboration with a global engineering team, and ongoing...

Actalent recherche un Développeur logiciel biomédical à Montréal pour concevoir et fabriquer des dispositifs médicaux avancés, incluant des cathéters pour procédures interventionnelles. Vous participerez à des projets qui repoussent les limites de la technologie médicale et auront un impact sur les soins aux patients.Le poste est hybride, avec...

The opportunity Every day, we connect billions of players with the games and experiences they love. Our Vector Gamer AI team sits at the heart of that mission, governing ad ranking and bidding decisions across billions of daily impressions, where large-scale machine learning and real-world impact converge at scale. We’re hiring a Staff Backend Engineer to...

Outlier invites experts to shape the future of autonomous agents like OpenClaw. This freelance, remote role offers up to $50 USD/hr and weekly payments. Most contributors spend 5-10 hrs/week, with potential to scale earnings based on project needs.Join a platform trusted by thousands of engineers worldwide, where you can choose flexible scheduling and access...

Outlier offers freelance, remote work for an OpenClaw Agent Builder role. Earn up to $50 USD/hr with weekly payments, and access to tools like GPT/Claude. Projects involve teaching AI agents to design, coordinate, and optimize complex workflows.Ideal candidates have 2+ years in backend engineering, AI automation, or complex systems, with experience building...

A leading AI technology company in Canada seeks a skilled backend engineer to develop scalable systems for integrating AI Agents within contact center environments. The role demands creating robust backend services, ensuring real-time communication, and implementing context-aware handoff mechanisms. Candidates should possess a degree in Computer Science,...

Justworks in Toronto, Canada is seeking a Senior Software Engineer to own large-scale projects from discovery through launch, delivering measurable customer impact. You will collaborate with product and design teams to craft scalable solutions and drive robust testing, monitoring and deployment practices.You will improve performance and reliability of...

Affirm, Inc. is seeking a mid-level backend engineer focused on CIAM to build and maintain authentication services powering registration, login, authorization, and account lifecycle flows for B2C and B2B experiences.You will collaborate with senior engineers and partner teams to deliver secure, reliable features. You will work on backend systems and APIs in...

Affirm, Inc. is seeking an experienced engineer to join the AI Platform team, shaping the gateway, runtime, and evaluation services that power AI workloads across millions of users.You will own end-to-end technical decisions, partnering with security and product teams to set guardrails and ensure scalable, reliable delivery. You will work on enabling...

At A ffirm, 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 Data and Storage Services team is responsible for affirm's data infrastructure across OLTP and OLAP systems, spanning critical online checkout databases, batch orchestration,...