python backend engineer jobs in Toronto

OpenSesame is hiring an AI Engineer to design and scale the backend powering our SMS-based AI agents used across insurance workflows. You will own core technical decisions from day one and build the systems that connect to real customer data and production insurance systems. The role emphasizes reliability, accuracy, and performance at scale, with high...

About Faire Faire is a technology wholesale platform built on the belief that the future is local. Independent retailers around the globe collectively represent a multi‑hundred‑billion‑dollar wholesale market that has historically been fragmented and offline. At Faire, we use technology, data, and machine learning to connect this thriving community...

Fullscript is hiring a senior IAM backend engineer in Canada. You will collaborate with a focused development pod to build and maintain IAM capabilities, focusing on authentication, authorization, and security across services. You’ll contribute to a scalable backend stack using Ruby on Rails, GraphQL, and Apollo, while partnering with product, security,...

Miratech helps visionaries change the world. We are a global IT services and consulting company that brings together enterprise and start-up innovation. Today, we support digital transformation for some of the world's largest enterprises. By partnering with both large and small players, we stay at the leading edge of technology, remain nimble even as a...

TRADER Corporation is a trusted Canadian leader in online media, dealer and lender services. The company is comprised of AutoTrader.ca, AutoSync, and Dealertrack Canada. AutoTrader.ca (also known as AutoHebdo.net in Quebec) offers the largest inventory of new and used cars in Canada, with over 25 million monthly visits. AutoSync, with over 3,500 subscribers,...

Cresta is on a mission to turn every customer conversation into a competitive advantage by unlocking the true potential of the contact center. Our platform combines the best of AI and human intelligence to help contact centers discover customer insights and behavioral best practices, automate conversations and inefficient processes, and empower every team...

HRB is seeking a Lead Backend Engineer with fintech experience to architect and scale payments infrastructure, ledger systems, and financial APIs. You will own core backend services, ensuring reliability and compliance while handling millions of dollars in daily transactions. The role emphasizes shipping secure, compliant financial features, collaborating...

United States Digital Space LLC is seeking a Staff Software Engineer for its Secures AI team to build the industry's first Identity Security Fabric for the agentic era. You will design and maintain backend services, enforce least privilege for agents, and advance AI-native development with secure, scalable systems. The role emphasizes collaboration with...

Fitch Ratings, part of Fitch Group, is seeking a Senior Software Engineer to join our Toronto-based Ratings Technology team. You will build and maintain full-stack applications with Python and React, leveraging FastAPI/Flask on the backend and modern frontend practices.Expect to work with PostgreSQL, Oracle, and MongoDB, while deploying through CI/CD...

A technology firm in Toronto is seeking a Front-End Developer to design and develop responsive, user-friendly interfaces using modern frameworks. The role requires collaboration with designers to implement UI/UX best practices and optimize performance for speed and accessibility. Strong problem-solving skills and the ability to mentor junior members are...

BrainyYack is seeking a Senior Python Developer to design and build scalable backend systems and AI-powered solutions. You will own backend development, APIs, and integrations, collaborating with product and architecture teams to deliver production-quality software. The role emphasizes hands-on engineering, system design, and mentoring teammates while...

Design, implement, and refine 3D game and simulation features using Panda3D. Develop custom tools and gameplay systems that provide flexibility and scripting capabilities. Collaborate with developers, artists, and researchers to translate project requirements into efficient and maintainable code. Optimize application performance across diverse hardware...

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...

Senior Backend Engineer### Senior Backend EngineerApply: Remote Canada (ON): Full time: Posted 30+ Days Ago: R49905## ## Job Description:# **Senior Software Engineer (AI-First, Agentic AI)**# **Remote Canada****Compensation & Role Details**Expected Salary Range: $130,000 - $170,000 CAD, depending on experience and qualificationsRole Type: New RoleAI...

Elevate your career as a Senior Software Engineer with Mozilla, focusing on backend systems for Firefox and enhancing cloud infrastructure in a collaborative environment. The Mozilla Corporation seeks an experienced engineer to join the Ecosystem Services Team. This role requires strong expertise in backend technologies, collaborating with product managers...

# Software Engineering, Backend (All Teams)Apply To JobJob ID: **3521006**DoorDash Technologies Canada Inc.Toronto, ON## **About the Team**DoorDash is building the world's most reliable on-demand, logistics engine for delivery! We're looking for experienced engineers to join our fast-growing engineering team to help us develop a 24x7, global infrastructure...

Outlier is seeking OpenClaw Agent Builder contractors to shape autonomous agents for real-time AI environments. This freelance, remote role offers up to $50 USD/hr with flexible hours and weekly payments. You’ll work on end-to-end agent design, evaluation, and optimization, collaborating with top AI teams to improve LLM-driven orchestration and multi-turn...

A leading IT consulting firm in Toronto is seeking an experienced Cloud Engineer proficient in AWS or Azure to join their cloud engineering team. The ideal candidate will have strong hands-on experience with cloud solutions, IaC tools, and modern programming languages. The position aims to enhance secure and automated cloud deployments within a collaborative...

CIBC is seeking a Backend Developer with 6–8 years of experience to design, build, and maintain scalable Java and GoLang services. You'll contribute to enterprise‑scale cloud projects, participate in architecture discussions, and mentor peers as a SME while working in a hybrid model with on-site and remote days. You’ll collaborate across teams,...

A leading AI solutions company is hiring an ML Engineer in Toronto, Canada. In this role, you will design and maintain serving stacks for machine learning models and automate training pipelines using Kubernetes. Candidates should have solid experience with Python and knowledge of ML infrastructures. Join a team committed to deploying innovative AI...