Jobs for senior python backend at Toronto

YO AI Labs is seeking a Software Engineer for a contract role focused on training and evaluating next-generation AI systems. The job suits developers who can reason through unfamiliar codebases, explain engineering decisions clearly, and solve practical backend, full-stack, or systems problems.Required: 3+ years of hands-on software engineering experience...

Senior Data Scientist (10+ years) to build AML transaction monitoring solutions using Python, and SQL 58574Our financial services client is seeking a Senior Data Scientist (10+ years) to build AML transaction monitoring solutions using Python, and SQL58574Join a leading financial institution supporting a new AML transaction monitoring initiative within a...

Advance your career as a Senior Software Engineer Backend with Veeva Systems. Benefit from a flexible work arrangement as you craft impactful backend services. At Veeva Ostro, we drive innovation in life sciences through strategic software solutions. In this role, you will create and manage high-performance APIs, ensuring seamless scalability and code...

A leading IT consultancy firm is seeking a candidate in Toronto to architect and implement AWS cloud native solutions. The role requires expertise in microservices, serverless architectures, and REST API development. Candidates should ensure security best practices and actively collaborate with cross-functional teams. The annual salary ranges from CA$ 90,000...

ZoomInfo is seeking anexperienced backend engineer to anchor the Chorus Engineering team in Toronto. You will design, build, and deploy mission-critical backend systems that power our conversation intelligence platform, setting standards and elevating the team’s architecture. The role emphasizes code quality, scalable performance, and mentoring engineers...

Affirm is seeking a hands-on CIAM backend engineer to design and ship core identity services for B2C and B2B platforms. You will build backend systems in Python and Kotlin, integrating OAuth 2.0, OIDC, SAML, and SCIM with scalable, secure APIs. Lead end-to-end authentication flows, MFA, device binding, and adaptive challenges while automating infrastructure...

About Us Talipay is transforming how subcontractor‑powered businesses scale their back‑office and access the working capital they need to grow. From invoice automation to embedded financing solutions, we help companies in staffing, logistics, and other service industries streamline operations, improve cash flow, and scale confidently. We’re on a...

Take your expertise to the next level as a Senior Backend Software Engineer with Sentry’s Events Analytics Platform. Focus on enhancing data visibility and performance in a cutting-edge environment. At Sentry, you will engage with the EAP team, responsible for infrastructure powering time-series data analytics. With at least 4 years in backend...

Transform the fintech landscape as a Senior Backend Engineer at a leading firm in Downtown Toronto. This hybrid position emphasizes building scalable backend systems for investment and risk management. In this role, you'll engage with diverse teams to design high-performance solutions that streamline financial data workflows and support complex datasets...

Take on a pivotal role as Lead Backend Engineer at Fullscript, enhancing developer experience while ensuring the technical strength of our health tech platform. Collaborate with teams to sculpt innovative solutions. In this senior position, you will own the long-term health of our monorepo, focusing on scalability and maintainability. Utilize your expertise...

Secure Every Identity, from AI to Human. Identity is the key to unlocking the potential of AI. Okta secures AI by building a trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work requires a relentless drive to solve complex challenges with real-world stakes. We are looking for builders and owners who operate...

Senior Software Engineer, Full-Stack Applications (Python & React) Business Unit: Fitch Group Category: Information Technology Date Posted: Aug 19, 2026 Fitch Ratings is seeking a Senior Software Engineer to join our global Ratings Technology team in Toronto. This is an opportunity to build and enhance mission-critical applications that power the...

Job Description As a Staff Engineer supporting the ADT - CODI program within Operations Technology, you will lead the technical design, development, and implementation of complex, multi-platform application software solutions, applying advanced expertise and knowledge to deliver innovative and strategic business outcomes. Leads software development projects...

Lead backend development efforts at Movable Ink in New York City as a Senior Backend Developer focused on integration and service reliability. Design systems that support innovative marketing solutions. As a Senior Backend Developer, you will take a leading role in shaping backend architecture and mentoring a growing team. Collaborating closely with product...

Elevate enterprise applications with your expertise as a Senior .NET Developer in Toronto, Ontario. This hybrid position combines leadership, coding, and architectural responsibilities in a dynamic development environment. We are looking for a Senior .NET Developer/Lead Backend Developer with 12 to 15 years of experience to oversee backend development...

Job Title Backend Engineer Python (API & Platform Engineering) Location Toronto, Ontario (Onsite) Experience 5-10+ years Role Overview We are seeking a skilled Python Backend Engineer to build and scale high-performance backend systems. This role focuses on API development, platform engineering, and system design for enterprise‑grade, secure, and...

Google's Waterloo office is hiring a Software Developer for the Developer Connect Insights team. You will build and scale backend services that integrate SDLC events from runtimes, deployments, artifacts, and dependencies, enabling developers to understand runtime health at large scale. You will work across teams, mentor juniors, and contribute to...

A tech recruitment firm in Toronto is seeking a Senior Python Software Engineer to enhance community knowledge with innovative solutions. The role requires expertise in Python and understanding of cloud computing, distributed systems, and relational databases. Strong communication skills and experience with GitHub are essential. This contract position offers...

At RAVL, we connect strategy with execution, care deeply about the people we work with, and measure success by the lasting impact we leave behind. Our purpose is to build a team that puts real, sustainable business outcomes at the core of everything we do. We're looking for a Senior Full Stack Developer to join our team on a short-term contract engagement....

Job Title: Full Stack Developer Lead (Java, Python, AWS, NodeJS)Location: Toronto, ONWork Arrangement: Hybrid-3 Days onsiteEmployment Type: ContractDuration: 12 MonthsDomain: BFSIPay Rate: CAD 45-50 /hour IncorporatedApplication Deadline: Sep 30th, 2026SKILLS REQUIRED10+ years of experience in application development, maintenance, and enterprise software...