senior backend software engineer python jobs in Montreal

The world’s most sophisticated companies rely on AlphaSense to remove uncertainty from decision-making. With market intelligence and search built on proven AI, AlphaSense delivers insights that matter from content you can trust. Our universe of public and private content includes equity research, company filings, event transcripts, expert calls, news,...

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...

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...

Build high-scale backend data services at Akamai using Python, Java, or Go with hands-on development across Cloud Data Services. Work within a global engineering team.As a Senior II Software Engineer, you will design and scale backend services, APIs, microservices, and distributed systems. You will balance technical oversight with development, clarify...

Design scalable backend systems for payment protection as a Senior Engineer, working fully remotely from Canada with fraud prevention expertise. Build reliable automation for disputes and risk management.This Senior Backend Engineer role focuses on payment dispute management, fraud prevention, and risk automation. You will own systems through architecture,...

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...

Build scalable campaign infrastructure remotely from Canada using Python or Ruby, distributed systems expertise, and modern backend engineering practices.This Senior Backend Developer joins the Campaigns Team within a collaborative engineering group. You will develop large-scale backend applications supporting personalized, multi-channel marketing campaigns....

Build AI platform infrastructure with Python or Kotlin as a remote Senior Backend Engineer at Affirm, serving teams and production workloads.This senior-level role owns technical decisions and projects across design, launch, and on-call. You will build highly available distributed systems using AWS, MySQL, and Kubernetes. Your work supports LLM gateways,...

askpolly transforms large-scale human conversation into actionable insights. By leveraging AI and patented statistical models to analyze organic social media data, askpolly provides near‑instant, statistically valid insight into market reactions, election outcomes, and messaging strategy. We are moving beyond traditional polling to give teams an agentic...

Build high-availability, low-latency identity systems at Affirm while using Python or Kotlin to support authentication and verification journeys remotely.As a Senior Software Engineer, you will own delivery for critical backend systems serving all Affirm products. You will understand business, product, and engineering context while leading engineers through...

Build Jeeves financial services remotely with Go, Python, or TypeScript while designing reliable systems for global payments and cards. Work full time from anywhere.As a Senior Backend Engineer, you will build backend services powering payments, cards, spend management, and compliance infrastructure. You will work with RESTful and GraphQL APIs, databases,...

We’re looking for a Senior Software (Database) Engineer to help build the underlying storage system for our general purpose data platformThe database layer has both OLAP and OTLP capabilities to support classic analytics queries while also serving up freshly stored dataIt embraces the separation of compute and storage and is designed to run on multiple...

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 most. The Batch Developer Experience team makes batch development and testing faster and more reliable at affirm. As a developer on this team you will partner with product and...

H2 Analytics is redefining how professionals train for high-stakes environments through advanced simulation and data-driven tools. We build EASE (Exercise Architect Suite), a tool used by military, intelligence, law enforcement, and emergency response organizations to develop intelligence-focused mission-critical training exercises.About the team and...

Our mission at Greenhouse is to make hiring work for everyone – so we go to great lengths to hire great people because we believe that they’re the foundation of our success. At Greenhouse, you’ll join a team that collaborates purposefully, fosters inclusivity, and communicates with transparency and accountability so we can achieve our mission. Join us...

LeverageTek is actively seeking an Integration Operations Senior Software Engineer for a 12-month contract with its Canada-based customer. Work Location Remote Key Tasks Provide production and operational support for the organization's integration platforms, services, and APIs Onboard internal teams to Azure API Management (APIM) Maintain, monitor,...

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 Card Loan Platform team builds the high-throughput decision engine at the heart of Affim’s card products. Unlike traditional cards, every pay‑later transaction is backed by...

Clarity is redefining how private companies and their shareholders access liquidity. Through its institutional-grade platform, Clarity brings together buyers, sellers, and issuers to facilitate secondary transactions in venture-backed, pre-IPO companies, introducing efficiency, transparency, and standardization to an otherwise opaque asset class. Recognized...

About Velora: check out our company website: joinvelora.com Our product websites: keela.co raisely.com aplos.com We’re excited to share that Aplos, Raisely, and Keela have come together to form one unified company, Velora, with a shared mission: to help nonprofit organizations thrive. While we continue to offer the products you know and love, we now...

4 days ago Be among the first 25 applicantsGet AI-powered advice on this job and more exclusive features.This range is provided by Pentasia. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.Base pay rangeCA$130,000.00/yr - CA$160,000.00/yrAbout the RoleA fast-growing digital entertainment company is...