senior backend software engineer python jobs in Montreal

Affirm, Inc. is seeking an experienced Capacity Modeling Engineer to own quarterly goals for the team and lead engineers through ambiguity while delivering capacity plans for peak sales events. You will translate demand forecasts into resource settings across regions and environments.You will collaborate with product, design and analytics, establish reliable...

About Us Coalition is the world's first Active Insurance provider designed to help prevent digital risk before it strikes. Founded in 2017, Coalition combines comprehensive insurance coverage and innovative cybersecurity tools to help businesses manage and mitigate potential cyberattacks. About Us Coalition is the world's first Active Insurance provider...

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...

Vocantas is seeking a senior software developer for a remote, backend-heavy role. You will own major features, design scalable architectures, and contribute to AI-enabled capabilities within the platform. The position emphasizes security, reliability, and multi-month project work within a small team.You’ll collaborate with Product and QA, mentor peers, and...

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...

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 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...

A global enterprise SaaS leader is seeking a Senior Software Engineer to enhance their core product. The successful candidate will architect scalable REST APIs, optimize backend services, and manage data workflows to support vast logistics operations. With a required 5+ years of experience in backend software engineering, expertise in Node.js, and a...

Ready to do the most impactful work of your career? At Coinbase, we are uncompromising on our mission to increase economic freedom. The bar is high, the environment is intense, and we like it that way. This isn't a place for complacency, it’s a place to be pushed past your perceived limits. If you're ready to build the future of finance alongside people...

Senior Software Engineer II – Machine Learning PlatformWe are seeking a Senior Software Engineer II to design and implement secure, highly scalable, and high‑performance pipelines for the end‑to‑end lifecycle of ML models within SurveyMonkey’s Machine Learning Platform team (MLP). As a key member, you will work at the intersection of Data Science...

About Motion Motion is building the command center for creative strategists: an AI-native platform that bridges the gap between performance marketers and creative teams, so they can uncover what’s working, what’s not, and ship more winning ads across platforms like YouTube, LinkedIn, Meta, and TikTok. We're at the forefront of AI as the foundation of our...

Help shape how engineers, analysts, and business teams build on and use our enterprise data platform You’ll design data products and the self-service experiences around them — from the data model to the APIs and workflows producers and consumers rely on — so teams can get what they need without waiting on tickets You’ll also help build the enterprise...

As the global leader in high-speed connectivity, Ciena is committed to a people-first approach. Our teams enjoy a culture focused on prioritizing a flexible work environment that empowers individual growth, well-being, and belonging. We’re a technology company that leads with our humanity—driving our business priorities alongside meaningful social,...

Are you passionate about building high-throughput, low-latency REST APIs that power critical platform infrastructure? Do you thrive on leading architectural decisions and mentoring engineers to elevate technical standards? Join our world-class enterprise security team Akamai empowers developers and organizations globally by providing resilient,...

If you thrive on building systems where every microsecond matters, this is your role. A well-established quantitative trading firm is seeking Senior Software Engineers to architect and own the core infrastructure that powers high-frequency trading at a global scale. You will not be maintaining someone else's codebase - you will be shaping the future of...

Senior Software Engineer, Quality Opportunity We are seeking a Senior Quality Engineer to join a newly established engineering team within the Unity Platforms Organization. This team is responsible for delivering Unity platform support for an Android-based ecosystem encompassing mobile, laptop, and hybrid form factors. We enable Unity developers to...

Design and develop complex software systems and applications, setting high standards for quality and innovation.Leverage Generative AI tools and coding assistants to enhance development velocity and solution quality.Deliver solutions that meet performance, scalability, and security requirements.Drive technical excellence through code reviews, design...

Camunda is the enterprise platform for agentic orchestration, enabling organizations to coordinate AI agents, people, and systems across complex, end-to-end business processes. With built-in governance, auditability, and human oversight, Camunda gives enterprises the control they need to move AI from pilots to production - safely and at scale. Trusted by...

Who we are.Newfold Digital is a leading web technology company serving millions of customers globally. Our customers know us through our robust portfolio of brands. We have some of the industry's most prominent and storied go-to-market brands, including Bluehost, HostGator, Domain.com, Network Solutions, Register.com and Web.com. We help customers of all...