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

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Lead Offensive Security Engineer at TCS

Take the lead in offensive security at Tata Consultancy Services as an Offensive Security Engineer. Specialize in analyzing AI-generated fixes and discovering real vulnerabilities.At TCS, you will spearhead the offensive security analysis necessary for the company's AI vulnerability program. Your role involv ...

Lead Development Engineer Search at MongoDB

Oversee the MongoDB Search Query platform as Lead Development Engineer in Toronto with a hybrid work arrangement. Ensure the success of your team in delivering high-availability search solutions.As part of MongoDB's Search team, you will lead and cultivate talent while resolving platform challenges inherent ...

Lead Mechanical Engineer in Nuclear Systems

Elevate your career at Sargent & Lundy as the Lead Mechanical Engineer focusing on nuclear systems. Leverage your technical expertise to design modifications and lead impactful project teams.In this leadership role, you will utilize your decade of experience in the power industry to create engineering specif ...

Lead Machine Learning Engineer at RBC

Step into the pivotal role of Lead Machine Learning Engineer with RBC, focusing on advanced AI applications in a high-performing team. Leverage your AI/ML expertise to drive innovation and deliver impactful solutions.This lead role requires a minimum of 5 years in software development, specializing in AI/ML ...

Lead Engineer at Sun Life Prospr

Become a Lead Engineer at Prospr within Sun Life, where you’ll address key engineering problems and shape the future of digital insurance solutions. Engage in a hybrid work environment maximizing flexibility.In this pivotal role, you will leverage over eight years of software engineering expertise to l ...

Lead Reliability Engineer for Azure Platforms

Join Manulife's team as a Lead Reliability Engineer, focusing on Azure Kubernetes Services and CI/CD processes in a hybrid environment. Drive platform efficiencies and best practices.In this director-level individual contributor role, you will advise Platform Services while directly managing platform r ...

Lead AI Engineer at Robots & Pencils

Join Robots & Pencils as a Lead AI Engineer and shape cutting-edge AI/ML systems. This pivotal role demands deep expertise, with a focus on design and production delivery.As a Staff AI Engineer, you will key technical leader guiding a cross-functional team in defining AI architecture, optimizing models ...

RBC Capital Markets Lead AI Engineer

Join RBC Capital Markets as a Lead AI Engineer to drive innovation through advanced AI solutions in a hybrid environment. Your skills in Generative AI and neural networks will be essential in transforming client engagement and sales productivity.In this pivotal role, you will design and develop sophist ...

Lead Automation Engineer for Quality Assurance

Enhance your career as a Lead Automation Engineer focused on quality assurance within our Digital Technology team. This role emphasizes the transition from traditional methods to robust automation.The successful candidate will bring a deep development background to advance code quality and foster compl ...

Lead Cloud Platform Engineer in Toronto

Elevate your career as a Lead Cloud Platform Engineer with emergiTEL in Toronto, focusing on large-scale cloud services and systems within the financial services sector.This permanent role involves combining operational support and systems engineering for highly available, scalable, and secure cloud se ...

Lead SaaS Backend Engineer at Kaseya

Elevate SaaS solutions with Kaseya Limited as a Senior Backend Engineer in Toronto, Ontario. You'll lead the design of innovative applications that incorporate AI and data-driven functionalities.This role focuses on building cutting-edge multi-tenant backend systems in a collaborative environment. With ...

Lead Software Engineer for Trading Systems

Transform trading platforms with innovative technology as a Lead Software Engineer in Toronto. Drive modernization initiatives using C++, SQL, and AWS to enhance performance and reliability.In this 6-month contract role, you'll lead efforts to modernize legacy trading systems within the Pension Fund in ...

Lead Machine Learning Engineer at RBC

Step into the pivotal role of Lead Machine Learning Engineer with RBC, focusing on advanced AI applications in a high-performing team. Leverage your AI/ML expertise to drive innovation and deliver impactful solutions.This lead role requires a minimum of 5 years in software development, specializing in ...

Lead Machine Learning Engineer / Applied Scientist

We’re looking for a Lead Machine Learning Engineer / Scientist to join our Algorithms and Research team within the ML & AI organization. In this role, you will help shape the reinforcement learning systems that power high-impact experiences across Upwork, including Search & Recommendations and Uma, our AI assist ...

Machine Learning Software Engineer Team Lead

RBC Borealis is at the forefront of artificial intelligence research and development, driving the innovative edge for the Royal Bank of Canada (RBC). Our team is dedicated to advancing the science of AI, delivering cutting‑edge solutions that create substantial value for RBC and its customers. As part of RBC, yo ...

Lead Front End Engineer at Relay

Elevate user experience as a Lead Front End Engineer at Relay, collaborating on UI design and development. Utilize your expertise in React and CSS to impact small business financial control.As a Senior Front End Engineer at Relay, you will drive quality and creativity in UI design and implementation. T ...

Lead Software Engineer Shop Builder Team

Join our dynamic team as a Staff Software Engineer, focusing on the Shop Builder platform. Lead development efforts, mentor engineers, and ensure high-quality code delivery in a collaborative environment.We are looking for a skilled Staff Software Engineer to spearhead the Shop Builder developer surfac ...

Lead Data Platform Engineer at TekRek

Drive innovation as a Lead Data Platform Engineer with TekRek. This role focuses on building and optimizing a cutting-edge data platform supporting real-time analytics and IoT workloads at petabyte scale.In this non-traditional engineering role at TekRek, you will own the long-term development of the d ...

Lead Software Engineer for Device Identity

Pursue excellence as a Lead Software Engineer in our Device Identity team, focusing on Java and scalable server-side solutions. This role emphasizes deep collaboration and mentorship alongside hands-on development.We are seeking a dynamic candidate with over seven years of software development experien ...

Lead Java Software Engineer at Behavox

Advance your career with Behavox as a Lead Java Software Engineer. Drive architectural innovation and leverage AI tools in a cloud-native environment for a mission-critical platform.In this senior role, you will be instrumental in architectural direction while focusing on hands-on Java development. You ...

Lead Platform Engineer Role at TD

Elevate your career with TD Securities as a Lead Platform Engineer in Toronto. Be at the forefront of building a robust Trading Risk Warehouse platform that meets the needs of various stakeholders.In this senior engineering role, you will shape the future of trading technology through effective system ...

Lead Systems Engineer at Kepler Communications

Join Kepler Communications as a Lead Systems Engineer, focusing on spacecraft software and fault management solutions. Drive innovative systems engineering for advanced space connectivity.This senior role emphasizes overseeing the integration of flight software with fault management. You will lead syst ...

Lead Java Engineer with AI Focus

Join Behavox as a Lead Java Engineer, specializing in AI-assisted engineering. Drive complex system solutions while collaborating in a hybrid work setting.In this role, you'll manage architectural decisions and implement advanced Java features for Behavox's cutting-edge platform. Expertise in Java internals, ...

Lead Reliability Engineer for Azure Platforms

Join Manulife's team as a Lead Reliability Engineer, focusing on Azure Kubernetes Services and CI/CD processes in a hybrid environment. Drive platform efficiencies and best practices.In this director-level individual contributor role, you will advise Platform Services while directly managing platform roadmap ...

Lead Machine Learning Engineer / Applied Scientist

We’re looking for a Lead Machine Learning Engineer / Scientist to join our Algorithms and Research team within the ML & AI organization. In this role, you will help shape the reinforcement learning systems that power high-impact experiences across Upwork, including Search & Recommendations and Uma, our AI ...

Lead Cloud Data Engineer at TCS

Elevate data engineering practices at Tata Consultancy Services in Toronto as a Lead Cloud Data Engineer. You'll design and optimize data pipelines while driving AWS innovations.Tata Consultancy Services is seeking a Principal Data Engineer to spearhead cloud-native frameworks on AWS. This role requires arch ...

Lead Full Stack Engineer — Remote Canada

A leading technology company is looking for a Lead Full Stack Engineer to develop application features in line with specifications. The ideal candidate will have extensive experience in Java and Javascript frameworks, including Angular and React, and will engage in incident management along with development task ...

Lead Machine Learning Engineer at Upwork

Become a Lead Machine Learning Engineer at Upwork, contributing to high-stakes projects in reinforcement learning. Shape innovative AI systems and drive impactful experiences on our evolving platform.In this hands-on role within the Algorithms and Research team, you will design, develop, and scale reinforcem ...

Principal Engineer: Lead Web Apps & Architecture

An innovative company is seeking a Principal Engineer to spearhead technical excellence in software development. This role involves leading the development of web applications, ensuring high standards through code reviews, and collaborating with engineering leadership to shape the product roadmap. You'll work wi ...

Senior Mechanical Engineer Lead Systems & Innovation

A leading medical device company in Toronto is looking for a Senior Mechanical Engineer to lead the engineering strategy for medical devices. The role involves overseeing the mechanical system architecture, ensuring compliance with regulatory requirements, and mentoring junior engineers. Candidates should have o ...

Lead Full Stack Engineer at Workday

Elevate AI solutions at Workday as a Lead Full Stack Engineer. Collaborate with a dynamic team in an engaging hybrid work model, focusing on impactful software development.In this senior role at Workday's Agent Factory, you will spearhead the creation of full stack applications that integrate sophistic ...

Lead Signalling Systems Engineer in Toronto

Become the Signalling Systems Engineering Group Manager at Alstom in Toronto, ON. This leadership role focuses on guiding engineering teams to achieve excellence in innovative railway signalling systems.In this experienced position, you will leverage your technical skills and leadership abilities. You’ ...

Lead AI Solution Engineer at League

Drive innovation in healthcare with League as the Lead AI Solution Engineer. Leverage deep expertise in AI to craft exceptional digital experiences for consumers.As Principal of Solution Engineering, you play a crucial role in League’s mission to enhance healthcare delivery through AI. Your responsibil ...

Lead Cloud Data Engineer at TCS

Elevate data engineering practices at Tata Consultancy Services in Toronto as a Lead Cloud Data Engineer. You'll design and optimize data pipelines while driving AWS innovations.Tata Consultancy Services is seeking a Principal Data Engineer to spearhead cloud-native frameworks on AWS. This role require ...

Lead Software Engineer for IAM Platform

Take charge of Kaseya's Identity and Access Management (IAM) platform as a Senior Staff Software Engineer. Focus on centralizing identity solutions for authentication, authorization, and compliance across products.In this role, you'll lead the architecture and evolution of IAM systems, leveraging over ...

Lead AI Driven Product Analytics Engineer

A tech-driven wholesale marketplace in Toronto is seeking a Data Engineering Lead to elevate product features using data and AI. In this role, you'll collaborate with multi-functional teams to design scalable data models and pipelines. Ideal candidates have at least 4 years of experience in data analytics and en ...

Lead Engineer for Linxon's Energy Projects

Experience a rewarding engineering career at Linxon as a Lead Engineer for Energy and Infrastructure Projects, located in Toronto, ON, with hybrid work flexibility. Focus on safety and cost-effective solutions.In this pivotal role, you will lead the engineering direction for a variety of projects, incl ...

Technical Lead Engineer Total Fund Management

Join CPP Investments as a Technical Lead Engineer, driving innovative solutions in Total Fund Management. Your expertise will help shape technology that empowers investment decisions.In this leadership role, you'll oversee the software development lifecycle for TFM, collaborating with various stakehold ...

Lead Quality Engineer with Data Expertise

Become a Lead Data Quality Engineer at our Toronto office, leading the charge in data integrity testing and validation strategies. This role demands a blend of technical skill and mentorship within a financial services framework.In this full-time position, you will spearhead the development of automate ...

Senior QA Engineer: Cloud Transformation Lead

Join Raise as a Senior QA Automation Engineer in a hybrid role based in Toronto, ON. This position involves hands-on leadership in enterprise-scale cloud projects and digital delivery initiatives.We seek a skilled technology professional with extensive experience to support modernization efforts. You w ...

Lead kdb+ Engineer at Data Intellect

Take charge of high-performance kdb+ solutions with Data Intellect. This senior engineering role focuses on scalable architectures and impactful data-driven finance.As a Senior kdb+ Engineer, you will design and implement robust systems for top-tier financial clients. You will oversee technical deliver ...

Lead Data Center Engineer Arcadis Canada

Shape the future of data centers as the Market Sector Lead at Arcadis, driving innovation and strategy. This role emphasizes both leadership and technical excellence in engineering.You will oversee the entire design and engineering process for data center projects, employing 15+ years of industry exper ...

Lead Software Engineer Cash App Banking

Elevate your career at Cash App as a Lead Software Engineer in the Banking team. Drive innovative banking experiences while improving system architecture for a seamless customer experience.Join Cash App's Banking server engineering team as a senior software engineer. This role emphasizes technical lead ...

Data Engineer & Modeling Lead at Bridgenext

Shape the future of data engineering as a Lead at Bridgenext in Toronto. This hybrid role focuses on engineering Azure-based data solutions while embracing data modeling best practices.As a Data Engineer and Modeling Lead, you'll combine your deep understanding of data structures with hands-on pipeline engin ...

Lead Machine Learning Engineer at BMO

Shape the future of AI at BMO Financial Group as a Lead Machine Learning Engineer. Focus on designing transformer-based models to create impactful business solutions ready for production.This senior role involves leading the design, training, and scaling of advanced machine learning systems. You will r ...

Lead Electrical Engineer Data Centers Toronto

HDR is seeking an Electrical Team Lead to guide data center design in Toronto, Ontario. Leverage your experience to set technical standards and drive project excellence.This full-time role requires leadership in electrical engineering with over ten years of relevant experience. You will serve as a tech ...

Lead Space Systems Engineer Kepler Communications

Become a key technical leader at Kepler Communications as a Lead Space Systems Engineer. Drive cutting-edge spacecraft solutions through advanced systems engineering and mentorship of junior engineers.This senior role involves defining complex system architectures and leading engineering efforts for sp ...

Lead Electrical Engineer at DIALOG Design

Become a Lead Electrical Engineer at DIALOG and influence community wellbeing through your innovative electrical designs. This role allows you to blend creative design with technical expertise in a collaborative setting.In this role, you will be responsible for the design and implementation of comprehe ...

Lead Systems Engineer – Microsoft 365 Specialist

Become the go-to Microsoft 365 expert as a Senior Systems Engineer at Leo Berwick. This role emphasizes security and automation in a hybrid work setting.At Leo Berwick, we are looking for a Senior Systems Engineer capable of owning our cloud-first technology infrastructure with hands-on expertise. You' ...

Lead Data Platform Engineer at TekRek

Elevate your career with TekRek as a Lead Data Platform Engineer, specializing in real-time ingestion and analytics for IoT systems. Drive architectural innovation for the modern telematics API.This role is tailored for a seasoned professional who will spearhead the development of a robust data platfor ...

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