Principal Senior Machine Learning Scientist in Canada

Reddit is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on the topics they care most about. With 100,000+ active communities and approximately 130 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit www.redditinc.com . Reddit’s Ads Data Science team is looking for a Senior Staff Data Scientist to lead the scientific strategy behind Reddit’s ads measurement and signal systems. This role sits at the center of how Reddit proves advertiser value, improves signal quality, builds privacy-aware measurement systems, and connects ads exposure to real advertiser outcomes. As a Senior Staff Data Scientist for Ads Measurement, you will be the principal architect of our technical vision and the driving force behind the next generation of our measurement ecosystem. In a landscape rapidly shifting due to privacy regulations, browser changes, and evolving platform dynamics, you will spearhead innovation across experimental design (incrementality/lift), identity, signals, and privacy-safe 1P/3P measurement. This is a high-visibility, high-impact role requiring a rare blend of deep experimentation & causal inference expertise, strategic foresight, and the ability to influence cross-functional executives and industry standards. You will not just adapt to the changing ad-tech environment, you will redefine how we measure value. Responsibilities Technical Vision & Strategy: Define the long-term data science vision & strategy across ads measurement, signal quality, identity, attribution, and privacy. Establish how Reddit should evaluate advertiser value, measurement quality, and signal utility across first-party and third-party products. Set the Cross-Pillar Measurement Science Strategy: Define the long-term data science strategy across a

About the Role: The Machine Learning team at Tubi drives the innovation behind personalized user experiences. With the largest inventory in the industry and hundreds of millions of viewers, we tackle problems in the space of recommendations, search, content understanding and ads optimization that shape the future of streaming. We are seeking a highly skilled Staff Machine Learning Engineer to contribute to transformative projects in video personalization. In this role, you will design and implement advanced algorithms and systems to improve our personalization strategy. As a senior technical expert, you will tackle complex problems in machine learning at scale, collaborating closely with cross-functional teams to develop and optimize machine learning-driven solutions. This is a hybrid role in our Toronto office. What You'll Do: Lead the design, development, and implementation of advanced recommendation systems and algorithms for a global audience Conduct deep dives into algorithmic components and systems, ensuring that models are optimized for both performance and scalability across multiple regions and product areas Build and deploy high-impact robust ML pipelines, including data extraction, feature development, model training, testing, and deployment Continuously monitor, evaluate, and optimize the performance of deployed models, ensuring they meet business goals and provide high-quality user experiences. Work closely with Product, Engineering, and Data Science teams to align on product requirements, set expectations, and deliver machine learning-driven solutions that improve user engagement Your Background: 8+ years of industry experience building production Machine Learning systems MSc or Ph.D. in Computer Science, Machine Learning, Statistics, Mathematics, or a related field Experience with deep learning technologies for recommendation systems, including TensorFlow, PyTorch, or similar frameworks Proficiency in building and deploying full-stack machine le

Secure Every Identity, from AI to Human Identity is the key to unlocking the potential of AI. Okta secures AI by building the trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work requires a relentless drive to solve complex challenges with real-world stakes. We are looking for builders and owners who operate with speed and urgency and execute with excellence. This is an opportunity to do career-defining work. We're all in on this mission. If you are too, let's talk. About Okta for AI Agents Okta secures access for 20,000 organizations and billions of users. Okta for AI Agents extends that work to the agentic shift. Deploying an AI agent is not like deploying traditional software. You are putting professional work output into production, and it needs deep integration, continuous tuning, and change management. Every agent needs an identity, a scope, an audit trail, and a way to be shut down when it goes wrong. Most enterprises have not built this yet. We are. We hire builders who see the cracks in enterprise agent identity that everyone else has learned to live with. The Role You are the most senior technical field authority for agent identity at Okta. Where a Senior FDE owns the outcome inside one account, you own the patterns that every account and every FDE inherits. You take the hardest and most strategic deployments yourself, set the reference architecture the team builds from, and turn what the field learns into the direction the product takes. You still write code. You also multiply the people around you, and you are the person product and engineering leadership call when an agent identity problem has no precedent. Responsibilities Own the reference architecture. Define the canonical agent identity, delegation, audit, and kill-switch patterns that Senior FDEs deploy across the portfolio, and keep them current as the standards and the product move. Lead the hardest accounts. Personally own the most strategic, regul

At ClickUp, we're building the future of work: the first truly converged AI workspace unifying tasks, docs, chat, calendar, and enterprise search, all supercharged by context-driven AI. We are an AI-native company. Every team member is expected to leverage AI daily, and we evaluate AI fluency as part of our hiring process. Join us and help redefine what's possible. 🚀 Role Overview We’re seeking a Principal Frontend Engineer to drive the long-term technical vision for frontend engineering at ClickUp. In this role, you will lead architectural strategy across major product surfaces, solve company-wide frontend challenges, and influence how teams build and ship at scale. You will partner deeply with engineering, product, design, backend, and integrations leadership to ensure ClickUp’s frontend systems remain fast, reliable, and adaptable as the business grows. This is a hands-on technical leadership role for someone who can operate at both strategic and implementation levels, especially in a high-growth, fast-paced environment. What You’ll Do Define and drive frontend architecture strategy across product areas and platform investments Lead the design of scalable, performant systems in Angular 2+ and React that support rapid product development Solve complex cross-team technical challenges related to performance, state management, scalability, and developer productivity Partner with backend and integrations teams to shape end-to-end architecture for major features and systems Raise the bar for quality, testing, maintainability, and engineering rigor across the frontend organization Provide technical leadership on the highest-impact initiatives and unblock teams working through ambiguous or difficult problems Guide teams toward pragmatic decisions that support both speed and long-term product quality Mentor senior and staff engineers, and help shape frontend engineering culture and standards Influence roadmap and organizational decisions through strong technical judgment

Secure Every Identity, from AI to Human Identity is the key to unlocking the potential of AI. Okta secures AI by building the trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work requires a relentless drive to solve complex challenges with real-world stakes. We are looking for builders and owners who operate with speed and urgency and execute with excellence. This is an opportunity to do career-defining work. We're all in on this mission. If you are too, let's talk. The Role You are a deep technical architect. Whether it's a Fortune 500 CTO or a startup founder, you know how to read the room and steer it. You have handled enough OAuth token flows, SCIM failures, and multi-product integration edge cases to spot root issues fast. In this role, you will help shape how developers understand identity at scale. You serve as the top technical escalation point for our support team. You are our domain expert. You influence product roadmaps. You mentor engineers. You challenge standard practices. You raise the bar across the entire global team. You handle ambiguity well. You operate with full autonomy. You focus on delivering outcomes that unblock our most complex accounts. What You Do Strategic Escalations and Architecture This is not primarily a queue role. You will mostly engage on cases that exceed senior engineer scope, the ones that need architecture judgment, not triage. End-to-End Ownership: Resolve our most complex developer cases, including multi-product architectures, ISV integration designs, and strategic account escalations. Cross-Functional Bridge: Serve as the technical link between Developer Support and ISV Partnerships, working directly with strategic partners on integration design. Architectural Consulting: Join customer and partner calls to advise on architecture and resolve issues beyond standard support scope. Product and Executive Engagement Roadmap Influence: Partner with Product Management and Engineering

Senior / Principal Layout Engineer – Module Architecture (Pathfinding) — San Jose, CA. Apply via Workday.

Senior Principal Engineer — Toronto, ON, CAN. Apply via Workday.

777-9 Deputy Fleet Chief (Senior or Principal) — USA - Seal Beach, CA. Apply via Workday.

We're transforming the grocery industry At Instacart, we invite the world to share love through food because we believe everyone should have access to the food they love and more time to enjoy it together. Where others see a simple need for grocery delivery, we see exciting complexity and endless opportunity to serve the varied needs of our community. We work to deliver an essential service that customers rely on to get their groceries and household goods, while also offering safe and flexible earnings opportunities to Instacart Personal Shoppers. Instacart has become a lifeline for millions of people, and we’re building the team to help push our shopping cart forward. If you’re ready to do the best work of your life, come join our table. Instacart is a Flex First team There’s no one-size fits all approach to how we do our best work. Our employees have the flexibility to choose where they do their best work—whether it’s from home, an office, or your favorite coffee shop—while staying connected and building community through regular in-person events. Learn more about our flexible approach to where we work. Overview About the Role We are looking for a Principal Supply Chain Partner Manager to join the Instacart Business & Supply Chain team. This is a senior individual contributor role for someone who operates at the intersection of strategy, enterprise partnership, and cross-functional leadership. You will own Instacart's most complex and highest-impact supply chain relationships, setting the strategic direction for how we engage with and grow our largest distributors and network partners. Beyond managing a portfolio of partners, you will shape how the broader team operates — establishing playbooks, influencing product direction, and serving as a thought leader internally and externally. You will be a trusted advisor to C-suite stakeholders on the partner side and a key voice in executive conversations internally. This role requires someone who can navigate deep a

Location : Montréal, QC. Mode hybride, 3 jours par semaine au bureau/ Hybrid, 3 days per week in-office. *English Version to Follow À propos du rôle : Nous sommes à la recherche d’un(e) Recruteur(se) principal(e) francophone, hautement organisé(e) et axé(e) sur les détails, pour se joindre à notre équipe. Le ou la candidat(e) idéal(e) devra démontrer une expérience en sourcing de candidats et en recrutement complet (cycle complet). Cette personne sera responsable de soutenir les candidats à travers les différentes étapes du processus d’acquisition de talents. Ce rôle exige de fortes compétences organisationnelles ainsi que la capacité de gérer plusieurs tâches simultanément. La collaboration et l’esprit d’équipe, combinés à d’excellentes aptitudes en coordination, sont essentiels pour réussir dans ce poste. À titre de Cadre principal en acquisition de talents, vous serez également responsable d’accompagner et de mentor(er) les membres juniors de l’équipe Talent. L’équipe d’acquisition de talents est responsable du sourcing, du tri, du recrutement, de la sélection, ainsi que de l’apprentissage et du développement de talents juniors destinés à la clientèle d’mthree dans les secteurs des services financiers et commerciaux. Les personnes postulant à ce poste devront être en mesure de gérer divers besoins en recrutement au sein de notre clientèle interne, couvrant un grand nombre de régions géographiques en Amérique du Nord, incluant les États-Unis et le Canada. Vous serez responsable de susciter l’intérêt pour les programmes d’mthree tout en recrutant des candidats de haute qualité et hautement diversifiés pour des postes chez nos clients. Responsabilités : Assurer la livraison constante de candidats diversifiés, de haute qualité et rapidement disponibles pour l’offre mondiale Alumni d’mthree. Gérer le recrutement de bout en bout pour des rôles de niveau junior à intermédiaire/sénior, selon les besoins. Sourcer, présélectionner et évaluer les candidats pour nos clients

Location : Montréal, QC. Mode hybride, 3 jours par semaine au bureau/ Hybrid, 3 days per week in-office. *English Version to Follow À propos du rôle : Nous sommes à la recherche d’un(e) Recruteur(se) principal(e) francophone, hautement organisé(e) et axé(e) sur les détails, pour se joindre à notre équipe. Le ou la candidat(e) idéal(e) devra démontrer une expérience en sourcing de candidats et en recrutement complet (cycle complet). Cette personne sera responsable de soutenir les candidats à travers les différentes étapes du processus d’acquisition de talents. Ce rôle exige de fortes compétences organisationnelles ainsi que la capacité de gérer plusieurs tâches simultanément. La collaboration et l’esprit d’équipe, combinés à d’excellentes aptitudes en coordination, sont essentiels pour réussir dans ce poste. À titre de Cadre principal en acquisition de talents, vous serez également responsable d’accompagner et de mentor(er) les membres juniors de l’équipe Talent. L’équipe d’acquisition de talents est responsable du sourcing, du tri, du recrutement, de la sélection, ainsi que de l’apprentissage et du développement de talents juniors destinés à la clientèle d’mthree dans les secteurs des services financiers et commerciaux. Les personnes postulant à ce poste devront être en mesure de gérer divers besoins en recrutement au sein de notre clientèle interne, couvrant un grand nombre de régions géographiques en Amérique du Nord, incluant les États-Unis et le Canada. Vous serez responsable de susciter l’intérêt pour les programmes d’mthree tout en recrutant des candidats de haute qualité et hautement diversifiés pour des postes chez nos clients. Responsabilités : Assurer la livraison constante de candidats diversifiés, de haute qualité et rapidement disponibles pour l’offre mondiale Alumni d’mthree. Gérer le recrutement de bout en bout pour des rôles de niveau junior à intermédiaire/sénior, selon les besoins. Sourcer, présélectionner et évaluer les candidats pour nos clients

Every day, tens of millions of people come to Roblox to explore, create, play, learn, and connect with friends in 3D immersive digital experiences– all created by our global community of developers and creators. At Roblox, we’re building the tools and platform that empower our community to bring any experience that they can imagine to life. Our vision is to reimagine the way people come together, from anywhere in the world, and on any device. We’re on a mission to connect a billion people with optimism and civility, and looking for amazing talent to help us get there. A career at Roblox means you’ll be working to shape the future of human interaction, solving unique technical challenges at scale, and helping to create safer, more civil shared experiences for everyone. About the Role Jobs Platform is Roblox's multi-tier orchestration system for microservices, powering AI Inference across Roblox. Through a simple developer API, we deliver a "deploy and forget" runtime, hiding the complexity of scheduling, scaling, and reliably running services across our on-prem and multi-cloud footprint at global scale. As Principal Product Manager, Jobs Platform, you'll take the helm at a defining moment - leading the charge as we scale the platform to become the default runtime for critical Roblox services worldwide. You Will Own Jobs Platform end-to-end - set the multi-year vision for how Roblox engineers deploy, run, and scale A

About Us Twitch is the world’s biggest live streaming service, with global communities built around gaming, entertainment, music, sports, cooking, and more. It is where thousands of communities come together for whatever, every day. We’re about community, inside and out. You’ll find coworkers who are eager to team up, collaborate, and smash (or elegantly solve) problems together. We’re on a quest to empower live communities, so if this sounds good to you, see what we’re up to on LinkedIn and X , and discover the projects we’re solving on our Blog . Be sure to explore our Interviewing Guide to learn how to ace our interview process. About the Role Platform Core Engineering (PCE) builds the foundational systems, frameworks, and tooling that Twitch's engineers build on every day. As a Senior Product Manager on PCE, your customers are developers, and your success depends on earning their trust. You will own a platform product area and be measured on whether developers actually adopt, rely on, and advocate for what you ship. This is a deeply technical, senior individual-contributor role. You are expected to be hands-on with modern AI development tools, to understand the technology you are shaping at a real level (not just at the surface), and to hold credibility in a room full of engineers. You can be based out of one of the Twitch offices including San Francisco, Seattle, Los Angeles, Irvine, or New York City. You Will: Own the strategy and roadmap for a PCE platform area, balancing near-term developer needs with a 1 to 2 year technical vision. Treat developers as your customers: understand their workflows, earn their trust, and prioritize the capabilities that make them faster and more effective. Work directly with Senior Engineering Managers and Principal Engineers to define technical and organizational needs and build a cohesive platform ecosystem. Define and drive the platform metrics that matter. Drive alignment across dependent

About Us Twitch is the world’s biggest live streaming service, with global communities built around gaming, entertainment, music, sports, cooking, and more. It is where thousands of communities come together for whatever, every day. We’re about community, inside and out. You’ll find coworkers who are eager to team up, collaborate, and smash (or elegantly solve) problems together. We’re on a quest to empower live communities, so if this sounds good to you, see what we’re up to on LinkedIn and X , and discover the projects we’re solving on our Blog . Be sure to explore our Interviewing Guide to learn how to ace our interview process. About the Role Platform Core Engineering (PCE) builds the foundational systems, frameworks, and tooling that Twitch's engineers build on every day. As a Senior Product Manager on PCE, your customers are developers, and your success depends on earning their trust. You will own a platform product area and be measured on whether developers actually adopt, rely on, and advocate for what you ship. This is a deeply technical, senior individual-contributor role. You are expected to be hands-on with modern AI development tools, to understand the technology you are shaping at a real level (not just at the surface), and to hold credibility in a room full of engineers. You can be based out of one of the Twitch offices including San Francisco, Seattle, Los Angeles, Irvine, or New York City. You Will: Own the strategy and roadmap for a PCE platform area, balancing near-term developer needs with a 1 to 2 year technical vision. Treat developers as your customers: understand their workflows, earn their trust, and prioritize the capabilities that make them faster and more effective. Work directly with Senior Engineering Managers and Principal Engineers to define technical and organizational needs and build a cohesive platform ecosystem. Define and drive the platform metrics that matter. Drive alignment across dependent

About Us Twitch is the world’s biggest live streaming service, with global communities built around gaming, entertainment, music, sports, cooking, and more. It is where thousands of communities come together for whatever, every day. We’re about community, inside and out. You’ll find coworkers who are eager to team up, collaborate, and smash (or elegantly solve) problems together. We’re on a quest to empower live communities, so if this sounds good to you, see what we’re up to on LinkedIn and X , and discover the projects we’re solving on our Blog . Be sure to explore our Interviewing Guide to learn how to ace our interview process. About the Role Twitch is searching for a People Partner to join our People and Places team. Reporting to the Director, People Business Partners and Employee Relations, you will support our employees, senior managers and Principal People Business Partners with our people programs and experiences at Twitch. Our people partners need to understand our business, have a connection to our employees, and a passion for our culture. They develop relationships which allow them to address pain points and ensure we have a workplace where everyone can contribute. Success in this role comes from maintaining organized routines, demonstrating strong follow-through, and building effective partnerships with both the People team, managers and employees. This role requires excellent organizational skills and the ability to thrive in a fast-paced environment where no two days are the same. You Will: Establish relationships with leaders up to the senior manager level, acting as a liaison between the People Team and the business. Coach senior managers on behaviors that impact engagement and retention. Reinforce expectations and guide leaders in effectively utilizing available resources to improve team communication, recognition, and performance conversations. Provide frontline employee support by responding to inquiries,