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Fastapi Programmer Jobs in Toronto, ON (NOW HIRING)

TELUS

Senior Software Developer

Toronto, ON · On-site

As a Software Developer with the AI Accelerator (AIA), your ability to design and build full-stack ... FastAPI * You have practical experience in Python development, especially in data-driven ...

Guidepoint

AI Engineer

Toronto, ON · On-site

Deep expertise in Python, a major backend framework (e.g., FastAPI, Flask), and asynchronous programming (e.g., asyncio). Proficiency in designing RESTful APIs, microservices, and the complete ...

THOMSON REUTERS

Principal Engineer

Toronto, ON · Hybrid

Principal Engineer CoCounsel is our most advanced AI offering to date - combining generative and ... Working proficiency in Python (or similar), and enough familiarity with FastAPI/Kubernetes ...

d1g1t

Senior Software Engineer, Backend

Toronto, ON · On-site

... FastAPI or Flask. * Demonstrated experience owning features or technical projects from design ... Background in Computer Science, Mathematics, Engineering, or a related technical discipline. Why ...

d1g1t

Senior Software Engineer, Backend

Toronto, ON

... FastAPI or Flask. * Demonstrated experience owning features or technical projects from design ... Background in Computer Science, Mathematics, Engineering, or a related technical discipline. Why ...

d1g1t

Senior Software Engineer, Backend

Toronto, ON · On-site

... FastAPI or Flask. * Demonstrated experience owning features or technical projects from design ... Background in Computer Science, Mathematics, Engineering, or a related technical discipline. Why ...

Escalent

Developer, AI Transformation Team

Toronto, ON · On-site +1

CA$135K - CA$155K/yr

Strong proficiency in Python and experience with frameworks such as Django, Flask, or FastAPI ... Understanding of asynchronous programming, performance optimization, and scalable backend ...

Guidepoint

Senior Data/AI Engineer

Toronto, ON

Deep expertise in Python, a major backend framework (e.g., FastAPI, Flask), and asynchronous programming (e.g., asyncio). Proficiency in designing RESTful APIs, microservices, and the complete ...

Tucows Inc.

Senior Backend Engineer

Toronto, ON · Remote

CA$145K - CA$155K/yr

As a Senior Backend Software Engineer, you will design, build, and maintain the services, databases ... Experience designing RESTful APIs using frameworks such as FastAPI or Gin. * Experience with ...

Tucows Domains

Senior Backend Engineer

Toronto, ON · Remote

CA$145K - CA$155K/yr

As a Senior Backend Software Engineer, you will design, build, and maintain the services, databases ... Experience designing RESTful APIs using frameworks such as FastAPI or Gin. * Experience with ...

Fulfillment IQ

Full-Stack Engineer III

Toronto, ON · Hybrid

CA$125K/yr

Full-Stack Engineer III Location: Toronto (Onsite/ Hybrid) Job Type: Full-Time Hiring Timeline ... Experience with FastAPI and SQLAlchemy * Experience building data-heavy interfaces such as ...

WSP

AI Developer (LLM & Agentic Systems)

Toronto, ON · On-site

CA$104K - CA$138K/yr

As an AI Developer (LLM & Agentic Systems), you will design and develop AI-enabled applications and ... Proven ability to design and build scalable backend systems and APIs (Python - FastAPI preferred ...

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Staff Software Engineer, AI Agentic Experience (Auth0)

Okta

Toronto, ON • Hybrid

Full-time

Posted 6 days ago

Okta rating

9.8

Company rating: 9.8 out of 10

Based on 5 frontline employees who took The Breakroom Quiz

3rd of 242 rated software companies

Job description

The Auth0 Team

Auth0 is an easy-to-implement authentication and authorization platform designed by developers for developers.  We make access to applications safe, secure, and seamless for the more than 100 million daily logins around the world. Our modern approach to identity enables this Tier- global service to deliver convenience, privacy, and security so customers can focus on innovation.

This team focuses on providing tenant-level protections to our customers, at scale. From bot detection to brute-force to suspicious IP throttling and beyond, this team often provides the first line of defense for Auth0 customers.

The Staff Software Engineer 

At Okta, we're building the next generation of authentication for the GenAI era. 

We're looking for a Staff Software Engineer to join the AI DevEx team at Auth0. This role is pivotal in extending and complementing our Auth for GenAI offering by building the infrastructure, tooling, and developer experiences that empower both human developers and AI agents to build secure, intelligent applications.

Auth0 Emerging Tech is the Engineering organization where we take care of the hottest technology out there: we ship fast, we don't break things. We are a dynamic and collaborative distributed and diverse team. We value ownership, learning and innovation.  

This is an ideal role for an engineer who enjoys building for other engineers, working across stacks, and shaping the future of AI enablement in production systems. You'll collaborate across engineering, product, and security teams to drive meaningful improvements in developer tooling, agent authentication, orchestration frameworks, and real-world demos.

What you will be doing:

  • Design and Build Developer Tooling that helps developers secure and manage infrastructure like MCP servers
  • Build Demo Applications that showcase secure, identity-powered AI use cases in real-world environments
  • Contribute to Open Source Projects, both within Auth0 and across the broader AI + identity ecosystem
  • Write and Maintain High-Quality Documentation including API references, quickstarts, and best practices for both developers and AI-native tooling (e.g., llm.txt)
  • Drive Integration with Emerging AI Frameworks by creating adapters, utilities, and interfaces for agent runtimes and orchestration layers
  • Collaborate with Design, Product, and Security teams to align on developer needs, roadmap direction, and compliance requirements
  • Mentor and Support Other Engineers, setting strong examples in code quality, testing practices, and architectural thinking
  • Influence Engineering Standards by leading design discussions and contributing to team-wide architectural decisions
  • Ensure Resilience and Security of systems involved in agent-to-agent or model-to-service communication

You Might Be a Good Fit If You

  • 8+ years of experience in software engineering with a proven track record in building tools, frameworks, or platforms for other developers
  • Proficiency in JavaScript/TypeScript, Golang and/or Python, and the ability to move fluidly between front-end and back-end contexts
  • Experience working with LLM APIs, agent runtimes, orchestration layers, or prompt pipelines
  • Familiarity with authentication and authorization systems, especially standards like OAuth2, OIDC, and JWT
  • Demonstrated experience leading architecture and design efforts for scalable, production-grade systems
  • Comfort contributing to and maintaining open source projects and engaging with developer communities
  • A passion for documentation as part of the developer experience-not just writing code, but making it understandable and usable
  • Ability to thrive in highly collaborative environments with cross-functional stakeholders

Technologies You May Work With

  • Languages: JavaScript, TypeScript, Python
  • Frameworks: React, Next.js, FastAPI
  • AI Ecosystem: Model APIs, orchestration runtimes, prompt management systems, agent toolkits
  • Auth0 Stack: Token Vault, Async Authorization, Fine-Grained Authorization (FGA)

#LI-Hybrid

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What Okta employees say

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Hours and flexibility

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