154,339+ Lead Fullstack Engineer Python Fastapi Jobs in Toronto, Canada — Local Employers Hiring June 2026

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Data Engineer Role at Take Two Interactive

Become a Data Engineer at Take-Two Interactive in New York City, where you'll apply your Python expertise to build and optimize data architectures. Embrace the challenge of supporting vast data operations.In this role, you will design and maintain scalable data solutions while working closely with business t ...

ZoomInfo Senior Data Engineer

Become a key player at ZoomInfo as a Senior Data Engineer, leading the development of enterprise data infrastructure. This role enables impactful data interactions and insights through innovative technologies.As part of the Data & AI Engineering team, you will design product-oriented data pipelines leveragin ...

Beanfield Software Engineer I Position

Join Beanfield as a Software Engineer I and be part of a collaborative team. Focus on backend development using Python and Java while designing scalable systems and APIs.In this role, you will work within a technology-driven environment, contributing to software development and implementation focusing ...

AI/ML Engineer with AWS Expertise

Take your AI/ML career to the next level by working with key AWS services. This role focuses on model development, deployment, and automation skills in a dynamic environment.As an AI/ML Engineer, you will engage in machine learning model development and deployment. Proficiency in Python, SQL, and designing d ...

AI/ML Engineer with AWS Expertise

Take your AI/ML career to the next level by working with key AWS services. This role focuses on model development, deployment, and automation skills in a dynamic environment.As an AI/ML Engineer, you will engage in machine learning model development and deployment. Proficiency in Python, SQL, and desig ...

Full Stack Software Engineer: eCommerce Focus

Elevate your career as a Full Stack Software Engineer with Flywheel, focusing on cutting-edge eCommerce solutions. Contribute to the Perpetua product using modern technologies like Python, React, and TypeScript.You will be instrumental in designing and constructing scalable backend services and intuiti ...

Full Stack Software Engineer: eCommerce Focus

Elevate your career as a Full Stack Software Engineer with Flywheel, focusing on cutting-edge eCommerce solutions. Contribute to the Perpetua product using modern technologies like Python, React, and TypeScript.You will be instrumental in designing and constructing scalable backend services and intuitive use ...

Senior Automation Developer at PLATO

Join PLATO, Canada's pioneering Indigenous-led firm, as a Senior Automation Developer. Support critical backend validation initiatives involving Dynamics 365 and leverage your automation expertise.This role seeks a seasoned automation engineer with over eight years of test automation experience and str ...

Numerical Software Developer at Seequent

Transform research into high-quality numerical software with Seequent as a Numerical Software Developer in Toronto. Utilize C++, Python, and CUDA in a hybrid work environment to deliver innovative Earth science solutions.Seequent is seeking an experienced Numerical Software Developer, reporting to the ...

Senior Devops Engineer Contract Toronto

OverviewSenior DevOps Engineer contract role at Payfare. You will join a diverse team delivering versatile and secure platform solutions that empower feature development teams to create high-quality services for customers. Responsibilities include monitoring and maintaining Payfare’s Kubernetes-based a ...

QA Automation Engineer (Toronto)

Overview Job Title: Python QA Automation Engineer – GenAI Location: Toronto, ON Work Style: Hybrid – 4 Days Onsite Duration: 12 Months Contract Client: TCS Role Summary We are seeking an experienced Python QA Automation Engineer with solid expertise in G ...

Quality Engineer

We are seeking a seasoned Quality Engineer with over 10 years of experience in software testing across various platforms including UI, Desktop, Mainframe, API, Mobile, and Non-Functional Testing. The ideal candidate will have strong expertise in both manual and automated testing, with hands-on exper ...

Quality Engineer

We are seeking a seasoned Quality Engineer with over 10 years of experience in software testing across various platforms including UI, Desktop, Mainframe, API, Mobile, and Non-Functional Testing. The ideal candidate will have strong expertise in both manual and automated testing, with hands-on exper ...

Quality Engineer

We are seeking a seasoned Quality Engineer with over 10 years of experience in software testing across various platforms including UI, Desktop, Mainframe, API, Mobile, and Non-Functional Testing. The ideal candidate will have strong expertise in both manual and automated testing, with hands-on exper ...

Senior Java Developer

We are looking for a smart, enthusiastic backend software engineer with experience in MongoDB and a keen interest in current technology and engineering. Using your knowledge of Java and MongoDB, and engineering best practices, you will be involved in helping clients to adopt the latest version of MongoDB across ...

Sr. SDET Engineer

Get AI-powered advice on this job and more exclusive features. Direct message the job poster from Iris Software Inc. Helping talents upskill their career journey in IRIS Software, Financial Services (BFSI) | Hiring Java Developers in Ontario Canada Iris's Fortune 100 direct client is lo ...

Sr. SDET Engineer

Get AI-powered advice on this job and more exclusive features. Direct message the job poster from Iris Software Inc. Helping talents upskill their career journey in IRIS Software, Financial Services (BFSI) | Hiring Java Developers in Ontario Canada Iris's Fortune 100 direct client is lo ...

Sr. SDET Engineer

Get AI-powered advice on this job and more exclusive features. Direct message the job poster from Iris Software Inc. Helping talents upskill their career journey in IRIS Software, Financial Services (BFSI) | Hiring Java Developers in Ontario Canada Iris's Fortune 100 direct client is lo ...

Senior Site Reliability Engineer

Job Overview SRE is part of a global organization that leverages the latest technology to communicate with our colleagues across the globe. We organize ourselves into distributed teams – SRE teams are anchored to iManage offices worldwide. Tuesdays and Fridays are dedicated to in‑office collaborat ...

Senior Search Applications Performance Engineer

Who are we? Our mission is to scale intelligence to serve humanity. We’re training and deploying frontier models for developers and enterprises who are building AI systems to power magical experiences like content generation, semantic search, RAG, and agents. We believe that our work is in ...

Senior Data Scientist

Senior Data Scientist Location: Princeton, NJ or New York, NY, Charlottesville, VA, Toronto, ON, Calgary, AB, or Mexico City, MX. Hybrid – 2 days onsite per week. Team The Collection Platforms & AI team builds machine‑learning powered products and capabilities to power natural‑l ...

Senior Data Scientist

Senior Data Scientist Location: Princeton, NJ or New York, NY, Charlottesville, VA, Toronto, ON, Calgary, AB, or Mexico City, MX. Hybrid – 2 days onsite per week. Team The Collection Platforms & AI team builds machine‑learning powered products and capabilities to power natural‑l ...

Senior Data Scientist

Senior Data Scientist Location: Princeton, NJ or New York, NY, Charlottesville, VA, Toronto, ON, Calgary, AB, or Mexico City, MX. Hybrid – 2 days onsite per week. Team The Collection Platforms & AI team builds machine‑learning powered products and capabilities to power natural‑l ...

Data Engineer

The Data Engineer will be responsible for developing and maintaining scalable data solutions, with a primary focus on Snowflake and SQL. This role requires strong analytical abilities, hands‑on data engineering expertise, and the capability to work independently. The ideal candidate will brin ...

Senior Machine Learning Engineer – LLM’s

Senior Machine Learning Engineer – LLM’s Tech scale up developing democratized AI Technology, backed by one of the worlds leading AI investors with multiple successes & exits. You’ll have experience with LLM’s and Reinforcement learning. BA in Computer Science (Masters or PhD preferred) or related field Eager to ...

Senior ML Engineer: Proactive AI for User Access

OverviewA leading software company in Toronto is looking for a Senior Machine Learning & AI Engineer to develop intelligence-driven user management systems. This pivotal role involves end-to-end development, data strategy, and deployment of ML models focusing on automation and predictive analytics. Can ...

Lead Engineer, Design Standards / ingenieur principal, normes de conception

About the job We are seeking a highway design engineer with extensive transportation engineering experience in design and construction. You will interpret engineering standard specifications and policies to produce effective construction contracts for Ontario’s highways and bridges. Join the Highway Design Offic ...

Lead AI Voice Engineer — Real Time Public Safety (Remote)

A mission-driven SaaS startup in Canada is seeking an Engineering Lead for their Voice AI product aimed at improving emergency response communications. The role involves software architecture, integrating advanced AI technologies, and leading a small team. Ideal candidates will have a strong background in softwa ...

Senior Full Stack Engineer: UI/UX & Data Pipelines Lead

A technology solutions firm is seeking a Senior Full Stack Developer to design and implement data pipelines while delivering high-quality applications. The ideal candidate has over 10 years of experience with Spring Framework, React, CSS, and mobile device coding. This position requires expertise in developing c ...

Lead Staff Engineer in Offensive Security and Red Teaming

Elevate security standards as a Staff Offensive Security Engineer. Focus on red teaming, real-world testing, and strategic collaboration in a vibrant office setting dedicated to financial innovation.As a central figure, you will lead red team operations and assess vulnerabilities across applications an ...

Lead Physical Design Engineer for Next Gen Technology Development

Become a key player in advancing physical design methodologies for cutting-edge technology. Thrive in a collaborative environment, focusing on low power, high-speed designs, and successful tapeouts.This role involves leading next-generation physical design efforts and developing methodologies in advanc ...

AI Native Full Stack Engineer — Lead Go/React/TS

A leading CI/CD platform is looking for an experienced engineer to take ownership of building AI-native solutions. You will define the technical approach, build end-to-end features, and lead system design discussions. The ideal candidate has over 5 years of full-stack experience, strong capabilities in React, Ty ...

Lead Data and Machine Learning Engineer in Innovative Team

Become a key technical leader as a Data and ML Engineer in a dynamic environment. Drive architectural decisions and foster collaboration while turning complex data into actionable insights.In your role as Senior Data & ML Engineer, you will lead a high-impact team and influence architectural quality. Y ...

Senior QA Engineer: Full Stack, ML & Cloud Test Lead

A leading healthcare solutions provider in Toronto is seeking a Senior Quality Assurance (QA) Engineer to lead testing efforts for clinical solutions. The successful candidate will ensure quality across development processes, define test automation systems, and collaborate with product management. This role requ ...

Lead Staff Software Engineer, Front End Deal Manager Experiences

Overview What we do: Our Lead Staff Software Engineers are end-to-end owners who participate in designing, building, and delivering data-focused products for our stakeholders. At The Trade Desk, we believe that each opportunity to engage with consumers is unique. User experience should enable our users to harnes ...

Lead AI Engineer, NLQ & Agentic Systems Toronto, Ontario, Canada

Upwork Inc.’s (Nasdaq: UPWK) family of companies connects businesses with global, AI-enabled talent across every contingent work type including freelance, fractional, and payrolled. This portfolio includes the Upwork Marketplace, which connects businesses with on-demand access to highly skilled talent acro ...

Senior Full Stack Engineer: UI/UX & Data Pipelines Lead

A technology solutions firm is seeking a Senior Full Stack Developer to design and implement data pipelines while delivering high-quality applications. The ideal candidate has over 10 years of experience with Spring Framework, React, CSS, and mobile device coding. This position requires expertise in developing c ...

Lead Software Engineer Front End (Bangkok based, Relocation provided)

Lead Software Engineer - Front End (Bangkok based, Relocation provided) 2 weeks ago Be among the first 25 applicantsAt Agoda, we bridge the world through travel. Our story began in 2005, when two lifelong friends and entrepreneurs, driven by their passion for travel, launched Agoda to make it easier fo ...

Lead R&D Engineer in AI/ML and HPC

Elevate your career as an R&D Engineer focused on AI/ML and high-performance computing. Build innovative workloads on a leading wafer-scale architecture to set new performance standards.This role within the Advanced Technology Group involves designing advanced scientific workflows and collaborating with inte ...

Senior QA Engineer: Full Stack, ML & Cloud Test Lead

A leading healthcare solutions provider in Toronto is seeking a Senior Quality Assurance (QA) Engineer to lead testing efforts for clinical solutions. The successful candidate will ensure quality across development processes, define test automation systems, and collaborate with product management. This role requ ...

Lead Staff Software Engineer, Front End Deal Manager Experiences

Overview What we do: Our Lead Staff Software Engineers are end-to-end owners who participate in designing, building, and delivering data-focused products for our stakeholders. At The Trade Desk, we believe that each opportunity to engage with consumers is unique. User experience should enable our ...

Senior Full Stack Engineer: UI/UX & Data Pipelines Lead

A technology solutions firm is seeking a Senior Full Stack Developer to design and implement data pipelines while delivering high-quality applications. The ideal candidate has over 10 years of experience with Spring Framework, React, CSS, and mobile device coding. This position requires expertise in developing c ...

Lead Staff Engineer in Offensive Security and Red Teaming

Elevate security standards as a Staff Offensive Security Engineer. Focus on red teaming, real-world testing, and strategic collaboration in a vibrant office setting dedicated to financial innovation.As a central figure, you will lead red team operations and assess vulnerabilities across applications and infr ...

Lead R&D Engineer in AI/ML and HPC

Elevate your career as an R&D Engineer focused on AI/ML and high-performance computing. Build innovative workloads on a leading wafer-scale architecture to set new performance standards.This role within the Advanced Technology Group involves designing advanced scientific workflows and collaborating with inte ...

AI Native Full Stack Engineer — Lead Go/React/TS

A leading CI/CD platform is looking for an experienced engineer to take ownership of building AI-native solutions. You will define the technical approach, build end-to-end features, and lead system design discussions. The ideal candidate has over 5 years of full-stack experience, strong capabilities in React, Ty ...

Lead AI Engineer, NLQ & Agentic Systems Toronto, Ontario, Canada

Upwork Inc.’s (Nasdaq: UPWK) family of companies connects businesses with global, AI-enabled talent across every contingent work type including freelance, fractional, and payrolled. This portfolio includes the Upwork Marketplace, which connects businesses with on-demand access to highly skilled talent acro ...

Lead Data and Machine Learning Engineer in Innovative Team

Become a key technical leader as a Data and ML Engineer in a dynamic environment. Drive architectural decisions and foster collaboration while turning complex data into actionable insights.In your role as Senior Data & ML Engineer, you will lead a high-impact team and influence architectural quality. You’ll ...

Lead Physical Design Engineer for Next Gen Technology Development

Become a key player in advancing physical design methodologies for cutting-edge technology. Thrive in a collaborative environment, focusing on low power, high-speed designs, and successful tapeouts.This role involves leading next-generation physical design efforts and developing methodologies in advanced tec ...

Senior Analog/RF IC Layout Engineer Lead High Speed

A leading technology firm in Toronto is looking for a Senior Analog / RF IC Layout Engineer. This role involves designing advanced mixed-signal silicon and collaborating with design teams to ensure layout quality while mentoring junior engineers. The candidate should have over 6 years of experience in high-speed ...

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    Lead Fullstack Engineer Python Fastapi Jobs in Toronto Job Search Guide, Trends and Insights