python backend engineer jobs in Montreal

Build AI platform services at Affirm using Python or Kotlin, designing reliable backend systems for production workloads at scale. Work remotely within your home country. As a Senior Backend Software Engineer, you will own technical decisions across the AI Platform team. You will build governed interfaces for models, tools, and agents while supporting...

Design financial APIs at Jeeves using Go, Python, or Node.js/TypeScript while working remotely or hybrid, depending on location and department. As a Senior Backend Engineer, you will build production systems for payments, cards, spend management, and compliance. You will support customers across more than 20 countries. The work includes RESTful and GraphQL...

Independently own larged-scoped projects from initial discovery through launch with a focus on outcomes and customer impactCollaborate with a cross functional team to find solutions to customer challengesImprove the performance, reliability, and scalability of our existing systemsPromote engineering excellence through technical leadership, knowledge-sharing...

Build reliable backend systems remotely with Instacart across Ontario, Alberta, British Columbia, or Nova Scotia. Apply distributed systems expertise to logistics.As a Senior Software Engineer, you will shape Instacart’s Logistics Platform, powering routing, task allocation, fulfillment tracking, and shopper compensation. You will design scalable services,...

Elevate your career as a Senior Backend Software Engineer with Affirm, focusing on online storage solutions in a remote-first environment. Be part of a team that builds and scales large-scale database systems. Affirm is seeking a talented senior software engineer to enhance its Data and Storage Services team. This role involves working with relational and...

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, streaming infrastructure, event-driven frameworks, BI, analytics tooling, large-scale data platforms, and agentic data tools such as semantic layers and internal platform data...

Commons is a platform that helps people use their money to build the life and world they want. Through our personal finance app, hundreds of thousands of individuals track, manage, and offset the impact of their dollars, saving $2,000 on average and lowering emissions by 10% a year. Through our carbon advisory offering, we provide end-to-end carbon diligence...

Who we are:Sardine is the leading agentic risk platform for fighting financial crime. Our integrated solution unifies data across risk teams to help organizations stop fraud in real time, prevent AI-driven attacks, and automate fraud and AML operations. Sardine’s platform is strengthened by one of the fastest-growing fraud consortiums in the market,...

Build AI-powered backend systems in Ottawa with Python, workflow orchestration, and scalable data-intensive architecture on a hybrid schedule. Own production software from design through delivery. askpolly seeks a Senior Software Engineer with 5–8 years of professional experience. You will design backend services, robust APIs, and agentic workflows for an...

Kake is a remote-first company and a people-first global community of senior engineers. Kake engineers are behind some of the world’s most innovative products (Brands you’ve heard!), from Fortune 500 to fast-growing companies. We believe it’s not where your table is, but what you bring to the table that matters. Our community spans 45,000+ engineers...

# GenAI Engineer (Python, RAG, LangChain, LangSmith)Apptad Inc · , CABack to resultsGenAI Engineer (Python, RAG, LangChain, LangSmith)Apptad Inc, CA Posted October 26, 2026 Via Talent.com### Full Job DescriptionJob Title: GEN AI Engineer (Python,RAG, LangChain, LangSmith)Job Location: Montreal, QC (3 days in a week)Job Type: Full-TimeOur challengeWe are...

A leading AI consultancy is looking for experienced Mechanical Engineers with strong Python skills for a freelance role. You will be responsible for training and evaluating AI models on complex mechanical engineering problems. This fully remote position offers flexible part-time hours, with the chance to earn up to $38/hour. Ideal candidates will have a...

Genpact Ltd. à Montréal recherche un Ingénieur Prompt pour développer et maintenir des solutions d’IA générative et d’ingénierie de prompts.Vous travaillerez au sein d’une équipe ML et collaborerez avec des clients et des experts métier pour comprendre les exigences et livrer du code Python de qualité. Le candidat idéal possède une solide...

Outlier is offering a freelance, remote OpenClaw Agent Builder role in Canada, paying up to $50 USD/hr with weekly payments. You’ll help shape autonomous agents like OpenClaw by building modular, production-grade software that handles data parsing, logic processing, and reporting.The work supports multi-turn interactions in live environments and offers...

Miratech is seeking a Senior AI Engineer with Python, LangGraph and LangChain to join our US healthcare client. You will play a key role in developing and enhancing an enterprise AI platform that enables intelligent workflows, conversational experiences, and AI-powered automation across multiple business functions. This is an exciting opportunity to work...

Build secure identity services at Affirm using Python or Kotlin while working remotely from eligible Canadian provinces. Authentication is central to this customer-facing engineering work. As a mid-engineering Software Engineer II in Information Security, you will contribute to customer identity and access management capabilities. You will develop backend...

Bayview Asset Management, LLC is seeking a Backend Engineer for the AI Platform team to design, build, test, and operate scalable backend services powering internal products and AI-enabled workflows.You will develop APIs, ensure reliability, and deploy on major clouds, collaborating with product, data, and AI teams in a regulated environment. This fully...

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. We...

A payment technology leader is seeking a Senior Software Engineer to join their fully remote team. This role focuses primarily on backend development, maintaining and enhancing payment processing systems while collaborating with various teams. The ideal candidate should have over 5 years of software development experience, strong skills in API design and...

At Affirm, 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 mostYour role will be instrumental in designing the next generation of Affirm’s Checkout Platform to provide a world‑class buying experience that puts customers first!We...