Job Title

Overview Join the Signals Modeling team, part of Microsoft AI Ads Engineering, to shape the future of advanced AI at web scale. In this role, the Senior Applied Scientist will design and implement state-of-the-art machine learning models and algorithms that power key systems within Microsoft Ads, Copilot, and beyond. The work will directly impact millions of users and advertisers by delivering scalable solutions that enhance ad relevance and optimize user and advertiser experiences. Responsibilities span the full modeling lifecycle, including training data and labeling strategy, feature and signal design, model development, and rigorous offline and online evaluation. Engineers and applied scientists work closely at the intersection of machine learning, economics, and large-scale systems to deliver high-performance real-time inference and robust experimentation in production. Microsofts mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond. Starting January 26, 2026, Microsoft AI (MAI) employees who live within a 50- mile commute of a designated Microsoft office in the U.S. or 25-mile commute of a non-U.S., country-specific location are expected to work from the office at least four days per week. This expectation is subject to local law and may vary by jurisdiction. Responsibilities Develop and deploy cutting-edge machine learning models, including transformers, generative AI, and reinforcement learning, to optimize user interactions and ad relevance across Microsoft Ads and Copilot. Design scalable algorithms for online and offline systems, delivering innovative solutions for ads selection, ad generation and ad relevance. Drive experimentation through A/B testing and offline validation to evaluate model performance and refine user behavior predictions. Build robust data pipelines and frameworks for handling large-scale, high-dimensional datasets to support advanced AI applications. Stay at the forefront of AI research, incorporating the latest advancements to drive innovation and impact across Microsoft platforms. Qualifications Required Qualifications: Bachelor''s Degree in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 4 years related experience (e.g., statistics predictive analytics, research) OR Master''s Degree in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 3 years related experience (e.g., statistics, predictive analytics, research) OR Doctorate in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 1 year(s) related experience (e.g., statistics, predictive analytics, research) OR equivalent experience. Preferred Qualifications: Master''s Degree in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 6 years related experience (e.g., statistics, predictive analytics, research) OR Doctorate in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 3 years related experience (e.g., statistics, predictive analytics, research) OR equivalent experience. Proven experience in programming and data analysis skills. Proven expertise in the areas of Generative AI, deep learning, Reinforcement learning, transformers or LLM. 5 years of experience in developing and deploying large-scale machine learning models. MicrosoftAI Applied Sciences IC4 - The typical base pay range for this role across Canada is CAD $114,400 - CAD $203,900 per year. Find additional pay information here: Applied Sciences IC4 - L''chelle salariale de base typique pour ce rle dans l''ensemble du Canada est de 114,400 $ CAD 203,900 $ CAD par anne. Pour plus d''information au sujet de la rmunration, veuillez cliquer ici: Ce poste sera ouvert pendant au moins cinq jours et les candidatures seront acceptes de faon continue jusqu ce que le poste soit pourvu. This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled. Microsoft est un employeur offrant lgalit daccs lemploi. Tous les candidats qualifis seront pris en considration pour lemploi, sans gard lge, lascendance, la citoyennet, la couleur, aux congs mdicaux ou familiaux, lidentit ou lexpression de genre, aux renseignements gntiques, ltat dimmigration, ltat matrimonial, ltat de sant, lorigine nationale, un ventuel handicap physique ou mental, laffiliation politique, au statut de vtran protg ou au statut militaire, la race, lethnie, la religion, au sexe (y compris la grossesse), lorientation sexuelle ou toute autre caractristique protge par les lois, ordonnances et rglements locaux applicables. Si vous avez besoin daide avec des accommodements religieux et/ou dun accommodement raisonnable en raison dun handicap pendant le processus de candidature, apprenez-en plus sur la demande daccommodement. Microsoft is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship, color, family or medical care leave, gender identity or expression, genetic information, immigration status, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran or military status, race, ethnicity, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable local laws, regulations and ordinances. If you need assistance with religious accommodations and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations.