senior backend software engineer python jobs in Toronto

As a market leader in AI-driven, data-powered, and privacy-compliant healthcare engagement, we connect the signals that drive earlier diagnosis, better treatment decisions, and sustained adherence. Our integrated, privacy-safe platform, enables life sciences companies to drive measurable patient and commercial outcomes with actionable intelligence —...

Senior Software EngineerPolicyMeSalary not statedFull-timeremote· seniorCanadapythonreactpostgreslangchainawsnodeListed via Jobicy · posted 16 Sept 2026. The application happens there, not on DevConnect.Apply on Jobicy## DescriptionOverview of the roleWe’re on a mission to modernize insurance, making it simpler, more accessible, and customer-first. The...

The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders - only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their...

About OpenLoop OpenLoop was co-founded by CEO, Dr. Jon Lensing, and COO, Christian Williams, with the vision to bring care anywhere. Our telehealth support solutions are thoughtfully designed to streamline and simplify go-to-market care delivery for companies offering meaningful virtual support to patients across an expansive array of specialties, in all 50...

We are seeking a Senior Software Developer to design, develop, test, and maintain modern web applications in an Agile environment. The ideal candidate will have strong experience with front-end and back-end technologies, cloud platforms, and DevOps practices.Must-Have QualificationsExperience working with Agile methodologiesStrong experience with React and...

At SimpleHedge, we are on a mission to empower farmers with the tools they need to secure their profits and manage risk through accessible, intuitive hedging solutions. Our journey began with a vision to make hedging straightforward for farmers, addressing the challenges unique to agricultural markets. Today, SimpleHedge continues to innovate, providing a...

85 to 95 CAD/HR for deserving candidates MUST HAVES SKILLS: 10+ years of demonstrated experience using JEE and JAVA Technologies including JSP, EJB, JTA, JMS, JNDI, JDBC and J2EE Security Experience with Frameworks including Spring, Maven, JPA, JQuery, Bootstrap, Hibernate, OpenJPA, EclipseLink, RESTEasy, Node.js, Anjular 5+ years of experience in design...

Our team develops and maintains core backend systems for the OpenTable For Restaurants productOur systems are responsible for determining which tables at a restaurant are available at various times and party configurations based on a system of constraints specified by each restaurantOur systems are also responsible for booking reservations and syncing their...

Elevate location search technology with Uber Maps as a Staff Software Engineer. Lead critical backend services and scalable systems while collaborating across teams in a dynamic environment.In this impactful role, you will set the technical direction for high-stakes Maps Search projects, from initial problem definition to full production delivery. You'll...

Build secure banking and payment backends as a Senior Java Engineer, using Spring Boot and distributed-system technologies in an international FinTech company. Our client is an established FinTech software provider with more than 25 years of experience. You will design, develop, test, deploy, and support Java backend services. The work covers REST APIs,...

Build scalable .NET 8 backend services with C# and Azure as a Senior Engineer at Kumaran Systems. Collaborate globally on transformation projects. This senior role focuses on production-ready backend engineering across .NET Core, C#, Web APIs, and Azure services. You will develop Azure Functions, Service Bus consumers, and App Service deployments. The work...

Enhance your career as a Senior Software Engineer, AI in Toronto, focusing on backend solutions that empower LLM applications. Transform user data into actionable insights.In this prominent role, you will be instrumental in developing backend architectures that support LLM-driven functions and workflows. With an emphasis on retrieval systems and real-time...

Join BitGo as a Senior Backend Engineer focusing on mobile solutions in Toronto. You'll design robust APIs and enhance the user experience for retail clients.In this full-time role at BitGo, you will collaborate intensively within the Mobile Engineering team to develop scalable services that empower our API-centric platform. With 6+ years of server-side...

Coursera in Toronto is seeking a Senior Software Developer on the Monetization team to lead technical initiatives, owning service architecture and product API development, and modeling data for scalable backend systems. You will design scalable architectures using Java, Play, Scala, and modern data stores, balancing hands-on coding with technical leadership...

Drive innovation as a Senior Backend Engineer with a remote-first AI-native platform team focused on marketing and creative insights. You will leverage your expertise in Node.js and TypeScript to craft robust backend systems that scale effectively. Join a fast-growing Series B company where you’ll design and maintain backend APIs that support various...

Build reliable AI infrastructure with Python and distributed systems at Lydia AI, working hybrid in Toronto to advance ORCA's platform. As a Senior Backend and AI Platform Engineer, you will improve ORCA's execution architecture and establish AI-native engineering practices. You will design backend services, APIs, asynchronous workflows, and secure...

# Senior Software EngineerSpotify Remote (Toronto) Full-timeFull-timeRemoteSoftware Engineering---## About this roleSpotify is hiring a Senior Software Engineer (Remote (Toronto)). This is a remote software development role listed on the official Spotify careers site.About the Role:The Platform team creates the technology that enables Spotify to learn...

Location: Toronto; must be able to work a hybrid schedule from our Toronto office. Job Overview We are seeking a highly skilled Senior/Staff Software Engineer with deep expertise in Python and modern backend frameworks to join the alitheia team. You will build scalable, secure and high-performance APIs and services that power data-driven solutions. The role...

Engineering @ AltaML - How We Work:We are an AI-first company. Claude Code and AltaML's shared configuration and skills library are the default way engineers design, build, test, and review software, not an optional accelerant a few people use.We expect dramatically higher productivity from working this way. A step change, not a marginal gain. That's the...

About Us Marble is building an AI-powered tax assistant and preparation platform that transforms how accounting firms and their clients handle tax season. We’re targeting the pain points of mid-to-large size accounting firms with intelligent tools designed to streamline complex tax workflows. We’re early stage, highly collaborative, and deeply focused on...