152,380+ Lead Fullstack Engineer Python Fastapi Jobs in Toronto, Canada — Local Employers Hiring June 2026

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Staff Software Engineer at ACV

Join ACV as a Staff Software Engineer, leveraging your expertise in Python and event-driven development to reshape the automotive industry. Enjoy a people-first workplace while contributing to innovative projects.In this role at ACV, you will take charge of developing high-quality software applications ...

Remote Senior Engineer, Machine Learning at Dayforce

Transform AI initiatives as a Remote Senior Machine Learning Engineer with Dayforce. Engage in model development for cloud-based applications and impactful data-driven solutions.In this influential role, you will take charge of creating and maintaining machine learning models that drive efficiency acro ...

Principal Databricks Data Engineer Toronto

Be a key player in data engineering with a role as Principal Databricks Data Engineer in Toronto. Focus on architecting solutions and optimizing platforms using Databricks and Spark technologies.This position requires expertise in developing and enhancing data platforms while collaborating with Finance and R ...

Full Stack Developer PolicyMe Remote Team

Lead the digital transformation of insurance with PolicyMe as a Full Stack Developer. Use your skills in Python and React while working remotely in a dynamic startup environment.We are looking for a Junior Software Engineer to join the development of our AI-powered web platform. This role involves building s ...

Product Engineer in Chemical Manufacturing

Elevate chemical production processes at Basetwo as a Product Engineer focusing on digital twin technology. Collaborate with clients and leverage AI-driven optimizations to improve efficiency.In this role, you will engage directly with specialty chemical manufacturers to drive innovation. With 5-7 year ...

Principal Databricks Data Engineer Toronto

Be a key player in data engineering with a role as Principal Databricks Data Engineer in Toronto. Focus on architecting solutions and optimizing platforms using Databricks and Spark technologies.This position requires expertise in developing and enhancing data platforms while collaborating with Finance and R ...

Senior Engineer Microservices Development

Be a key player in developing microservices as a Senior Software Engineer in Toronto, utilizing cutting-edge technology to innovate within the financial sector.This role offers an opportunity to work with a top-tier company known for its financial services. You will lead the development lifecycle, ensuring q ...

Lead Software Engineer at NVIDIA AI Focus

Elevate your career as a Lead Software Engineer at NVIDIA, specializing in AI and conversational tools. You'll drive innovation while creating significant AI-driven applications that carry weight in user interactions.In this role, your contributions will be vital to the core development of security and dialo ...

Architect Distributed Systems at Autodesk

Become a Senior Software Engineer at Autodesk in Toronto, ON, focusing on building scalable and resilient systems for data processing and analytics. Develop innovative APIs and automate workflows.In this pivotal role within the Data Platform team, you will influence architectural direction while engineering ...

Machine Learning Engineer AI Innovation Teams

Machine Learning Engineer – AI Innovation TeamsAs one of the world’s top three credit ratings agencies, Fitch Ratings plays a critical role in global capital markets by providing credit analysis, ratings, research, and commentary to financial market participants. For over 100 years, F ...

Data Engineer

Job Description Data Engineer and Generative AI/ML Specialist Skill Cluster/Practice: Data Engineering / Emerging Technologies (GenAI) We are seeking an innovative and results-driven Data Engineer and GenAI/ML Specialist with expertise in large-scale data engineering, LLM-based autom ...

Data Engineer

Job Description Data Engineer and Generative AI/ML Specialist Skill Cluster/Practice: Data Engineering / Emerging Technologies (GenAI) We are seeking an innovative and results-driven Data Engineer and GenAI/ML Specialist with expertise in large-scale data engineering, LLM-based autom ...

Senior Technical Systems Analyst

What is the opportunity? You will join a high-performing team focused on transforming Merchant Payment Systems. The role supports modernization of enterprise payment platforms through API-driven services, cloud-native architectures, and data-driven insights, as well as support and development of IBM Mainframe ap ...

Sr. Full Stack Engineer (Toronto, Hybrid)

Reffie is an early-stage startup building the next-generation workflow and data analytics platform for residential real estate owners, operators, and property managers. Antiquated software causes renting to be a painful experience for everyone involved. Our mission is to streamline rental communications and hous ...

Senior AI Powered Backend Architect

A leading digital transformation consultancy in Toronto is seeking a Principal Agentic Engineer (Back-end) to design, build, and scale robust backend systems for AI-powered products. The role requires strong leadership skills alongside deep technical expertise in Python and cloud-native architectures. You'll lea ...

Senior Staff Software Engineer, Data

Senior Staff Software Engineer – Data Architecture Lead We are hiring a Senior Staff Software Engineer to lead data architecture across our platform. This is a senior individual contributor role with two tightly coupled responsibilities: defining and unifying the canonical business data model tha ...

(Canada) Lead AI Security Software Engineer (contract)

(Canada) Lead AI Security Software Engineer (Contract)Contract (3 months 23 days) Published a week ago Python AI AWS lead ai Job Description – Lead AI Security Software Engineer Are you passionate about applying large language models (LLMs) and AI agents to areas where they can have a significant impac ...

Senior Staff Software Engineer, Data

Senior Staff Software Engineer – Data Architecture Lead We are hiring a Senior Staff Software Engineer to lead data architecture across our platform. This is a senior individual contributor role with two tightly coupled responsibilities: defining and unifying the canonical business data model that underpins our ...

Quality Assurance Automation Lead

Job Title: Lead QA Engineer (Associate Director Level) Duration: 6months (CTH) No. of Positions: 1 Job Description - Lead QA Engineer What is the opportunity? We're seeking an experienced QA Lead who can balance hands‑on technical excellen ...

Principal Backend Architect — Scale Global AI Platform

A dynamic technology company in Toronto is seeking a Principal Software Engineer to architect and scale core systems essential for operations. In this senior role, candidates will lead technical initiatives, establish engineering standards, and mentor teams to shape the engineering culture. Ideal applicants shou ...

Senior AI Powered Full Stack Engineer — Platform Leader

A leading financial services company located in Toronto is seeking a Senior Software Engineer to drive the development of AI-powered applications. In this role, you will lead technical initiatives, architect solutions, and mentor engineers within a vibrant innovation hub. Ideal candidates will have 12+ years of ...

Senior AI Powered Full Stack Engineer — Platform Leader

A leading financial services company located in Toronto is seeking a Senior Software Engineer to drive the development of AI-powered applications. In this role, you will lead technical initiatives, architect solutions, and mentor engineers within a vibrant innovation hub. Ideal candidates will have 12+ years of ...

Principal Backend Architect — Scale Global AI Platform

A dynamic technology company in Toronto is seeking a Principal Software Engineer to architect and scale core systems essential for operations. In this senior role, candidates will lead technical initiatives, establish engineering standards, and mentor teams to shape the engineering culture. Ideal applicants shou ...

Full Stack Developer

About us Nova provides advertising technology to hundreds of media companies around the world including publishers, buy-side media agencies, and ad tech platforms. American Express, Dell, L’Oréal, McDonalds, Microsoft, P&G, Samsung, Spotify, Lego, Intel, Starbucks, Gucci, Dyson, and Unilever are some of the 5,00 ...

Senior Software Engineer (Global Security)

Opportunity Do you enjoy cyber security research and innovation, proactive thinking and problem solving, in a challenging and adaptive environment while constantly thinking outside of the box? If so, this opportunity is right for you!Job Overview RBC’s Security Research & Innovation team researches thr ...

Principal Software Engineer

Our mission? To power measurable employee engagement worldwide. And we’d love for you to join us! About the job - Principal Software Engineer ContactMonkey's platform already runs AI in production - AI-powered template editing, a standalone ConfidenceCheck service that evaluates out ...

Principal Software Engineer

Our mission? To power measurable employee engagement worldwide. And we’d love for you to join us!About the job - Principal Software EngineerContactMonkey's platform already runs AI in production - AI-powered template editing, a standalone ConfidenceCheck service that evaluates outgoing emails ...

Software Engineer (AI First), Fleet Operations

SWTCH is pioneering EV charging solutions for multifamily and commercial properties across North America. Since 2016, our team of entrepreneurs, energy professionals, and technologists has been focused on unlocking the social, economic, and environmental benefits of widespread EV adoption. Today, our solut ...

Software Engineer (AI First), Fleet Operations

SWTCH is pioneering EV charging solutions for multifamily and commercial properties across North America. Since 2016, our team of entrepreneurs, energy professionals, and technologists has been focused on unlocking the social, economic, and environmental benefits of widespread EV adoption. Today, our solutions a ...

Senior AI Engineer LLM Architect

Join UST as a Senior AI Engineer and specialize in LLM-powered applications. This remote role demands strong Python skills to lead the development of innovative agentic systems.In this pivotal position at UST, you will architect and construct LLM applications while overseeing their deployment and integration ...

Senior Software Engineer, Hybrid Work Role

Join CanCap as a Senior Software Engineer in a hybrid role based in Downtown Toronto. Utilize your strong coding skills in Python and TypeScript to reshape financial technology.As part of our innovative engineering team, you will lead the technical strategy for our product-led initiatives. You will be instru ...

AI Focused Software Engineer at Waabi

Join Waabi as an AI-Focused Software Engineer, where you'll enhance data labeling and automation for pioneering self-driving technology. Enjoy a flexible work environment while driving significant AI advancements.In this role, you'll bring 4+ years of experience and proficiency in Python to design and implem ...

Senior Software Engineer for Cutting Edge Data Infrastructure

Transform how data infrastructure is built as a Senior Software Engineer. Play a crucial role in developing AI-native, scalable systems that advance our capabilities across analytics and insights.This high-impact position emphasizes ownership of complex systems and the ability to deliver innovative solutions ...

Data Enablement Lead Engineer for Enterprise Platforms and APIs

Drive enterprise data strategy as a Lead Engineer in Data Enablement. Innovate secure and scalable backend services and tools to enhance user access and governance for data products in a hybrid setting.In this key position, you'll focus on designing and building robust data services that empower the organiza ...

Expert Solutions Engineer in AI

Shape enterprise AI solutions as a Solutions Engineer at DigitalT3, located in Toronto. Bring your technical acumen and strategic mindset to modernize client operations.As a key player in a strategic client initiative, you will utilize your deep technical knowledge and consultative skills to support enterpri ...

Senior Application Developer at TMX

Take your software engineering skills to the next level at TMX as a Senior Application Developer. This hybrid role in Toronto combines advanced C++ development with mentoring and automation expertise.At TMX, join our core team in the DataXchange Squad. Your role as a Senior Software Engineer emphasizes high- ...

Innovative Senior Software Engineer in Financial Services Transformation

Join a revolutionary movement in financial technology as a Senior Software Engineer. Utilize your skills to drive the architecture and implementation of innovative, scalable solutions.In this dynamic role, you'll take charge of critical technical initiatives that define the future of our platform. You' ...

Senior Data Engineer: Build and Scale Innovative Data Solutions

Embrace an exciting opportunity as a remote Senior Data Engineer. Lead the charge in building scalable data solutions, utilizing Databricks on AWS for impactful results.This mid-senior level position involves hands-on design and implementation of data engineering solutions aimed at optimizing performance and ...

Senior Software Engineer for Cutting Edge Data Infrastructure

Transform how data infrastructure is built as a Senior Software Engineer. Play a crucial role in developing AI-native, scalable systems that advance our capabilities across analytics and insights.This high-impact position emphasizes ownership of complex systems and the ability to deliver innovative sol ...

Data Enablement Lead Engineer for Enterprise Platforms and APIs

Drive enterprise data strategy as a Lead Engineer in Data Enablement. Innovate secure and scalable backend services and tools to enhance user access and governance for data products in a hybrid setting.In this key position, you'll focus on designing and building robust data services that empower the organiza ...

Data Engineer III at Restaurant Brands

Elevate your data engineering skills with Restaurant Brands International as a Data Engineer III based in Toronto. Lead the development of scalable data pipelines and leverage Apache Spark and AWS.This role focuses on building and managing efficient data architectures while collaborating with diverse teams. ...

Senior Data Engineer: Build and Scale Innovative Data Solutions

Embrace an exciting opportunity as a remote Senior Data Engineer. Lead the charge in building scalable data solutions, utilizing Databricks on AWS for impactful results.This mid-senior level position involves hands-on design and implementation of data engineering solutions aimed at optimizing performance and ...

Data Enablement Lead Engineer for Enterprise Platforms and APIs

Drive enterprise data strategy as a Lead Engineer in Data Enablement. Innovate secure and scalable backend services and tools to enhance user access and governance for data products in a hybrid setting.In this key position, you'll focus on designing and building robust data services that empower the organiza ...

Senior Application Developer at TMX

Take your software engineering skills to the next level at TMX as a Senior Application Developer. This hybrid role in Toronto combines advanced C++ development with mentoring and automation expertise.At TMX, join our core team in the DataXchange Squad. Your role as a Senior Software Engineer emphasizes high- ...

Remote Senior Engineer, Machine Learning at Dayforce

Transform AI initiatives as a Remote Senior Machine Learning Engineer with Dayforce. Engage in model development for cloud-based applications and impactful data-driven solutions.In this influential role, you will take charge of creating and maintaining machine learning models that drive efficiency across var ...

Backend Software Engineer at Affirm

Drive engineering excellence as a Senior Software Engineer on Affirm's Growth Platform team. This remote position focuses on backend system design and development, using Python or Kotlin to enhance user acquisition.In this mid-senior level role, you will lead a team of engineers, prioritize quarterly goals, ...

Backend Software Engineer at Affirm

Drive engineering excellence as a Senior Software Engineer on Affirm's Growth Platform team. This remote position focuses on backend system design and development, using Python or Kotlin to enhance user acquisition.In this mid-senior level role, you will lead a team of engineers, prioritize quarterly goals, ...

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