In Feeds and AI team, we’re building Microsoft Start, a content powerhouse for every person on the planet to be informed, entertained, and inspired. Microsoft Start is the place for all to read, watch, listen, create, connect with people of shared interests, and experience wonders in the world.   

We are looking for a skilled and experienced Senior Applied Scientist to join our ranking foundation team. As a Senior Applied Scientist focusing on recommender systems, you will play an important role in contributing to the development and optimization of our online services and offline pipelines within our content ecosystem to achieve product and business growth goals.  

• Algorithm Development and Enhancement for ranking algorithms in News & Feeds
• Work with cross-functional teams to design, develop, and implement recommendation algorithms to deliver product features and drive user engagement.
• Optimize existing recommendation algorithms by analyzing performance metrics and user feedback, incorporating advanced machine learning techniques including generative AI techniques.  
• Innovation in the area of advanced AI solution, and recommender system.
• Perform data analysis to identify patterns, trends, and opportunities to improve the relevance and quality of our recommendation systems.
• Build systemic solutions and models to optimize user experience. 

• 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. 
• Minimum of 3 years of professional experience in recommender systems, search engines, or online advertising, with strong expertise in machine learning algorithms, generative AI and large language models (LLMs), statistics, and data mining techniques applied to personalization.
• Proven problem-solving abilities and a track record of thriving in fast-paced, collaborative environments. Excellent communication and teamwork skills, with the ability to clearly articulate complex technical concepts to a variety of audiences.
• Proficient in Python programming, with additional experience in languages such as C# or C++ considered a plus. 

Additional or 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. 

This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

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.

Required Qualifications:

Preferred Qualifications:

• Master’s Degree in Computer Science or related technical field AND 3+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelor’s Degree in Computer Science or related technical field AND 5+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.
• 5+ years of working experience in NLP/search related areas.
• Good experience in LLM post-train, finetuning.
• Experience in RAG system.
• Solid problem-solving skills, and ability to work independently.

This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

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.

MAI Ads team in Microsoft APRD is responsible for providing the advertising industry with the state-of-the-art online advertising platform and service. Our team is at the core of this effort, working on the following research & development: Selection(recall), Relevance, User Response Prediction (Click Prediction and Conversion prediction), Autobidding, Large Language Model and Large Scale Machine Learning Training & Serving System. The team is a world-class R&D team of passionate and talented scientists and engineers who aspire to solve challenging problems and turn innovative ideas into high-quality products and services that can help hundreds of millions of users and advertisers, and directly impact our business.

Microsoft’s 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.

Preferred Qualifications:

This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

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.

Required Qualifications:

• Bachelor’s Degree in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 2+ 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 1+ year(s) related experience (e.g., statistics, predictive analytics, research)
  • OR Doctorate in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field
  • OR equivalent experience.
• Minimum of 2 years of hands-on experience designing and building search, retrieval, or ranking systems.
• Proven track record of shipping LLM-powered or Retrieval-Augmented Generation (RAG) systems into production environments.
• Solid coding skills and solid foundation in machine learning, with the ability to implement and optimize models effectively.
• Demonstrated ability to lead through ambiguity, make principled trade-offs, and deliver measurable impact in cross-functional, fast-paced settings.

Preferred Qualifications:

• Bachelor’s Degree in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 5+ 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.
• Minimum of 4 years of hands-on experience designing and building search, retrieval, or ranking systems.
• Demonstrated expertise in information retrieval, with publications in top-tier conferences or journals such as NeurIPS, ICML, ICLR, SIGIR, or ACL.
• Hands-on experience in large language model (LLM) development, including pretraining, supervised fine-tuning (SFT), and reinforcement learning (RL).
• Proven track record in optimizing LLM inference, or active contributions to open-source frameworks like vLLM, SGLang, or related projects.

#MicrosoftAI 

This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

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.

This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

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.

Required Qualifications:

• Bachelor’s Degree AND 5+ years experience in product/service/program management or software development
  • OR equivalent experience.
• Solid analytical and problem-solving skills.
• Ability to synthesize complex issues and communicate effectively with senior stakeholders.
• Expertise in defining user journeys and making trade-offs between short-term and long-term investments.
• Technical Acumen: Familiarity with mobile app performance metrics, and AI-driven experiences.
• Leadership: Proven ability to lead by example, mentor junior PMs, and foster an inclusive team culture.
• Data-Driven Mindset: Proficiency in A/B testing, experimentation platforms, and interpreting behavioral analytics to drive product decisions.
• Communication Skills: Exceptional ability to articulate vision and strategy to executives and stakeholders.
• Innovation Track Record: History of delivering breakthrough features that significantly improve engagement and retention.

Other Requirements:
Ability to meet Microsoft, customer and/or government security screening requirements are required for this role. These requirements include but are not limited to the following specialized security screenings:

• Microsoft Cloud Background Check: This position will be required to pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter.

Preferred Qualifications:

• Bachelor’s Degree AND 8+ years experience in product/service/program management or software development
  • OR equivalent experience.
• Mobile Expertise: Deep understanding of mobile UX patterns, app store ecosystems, and performance optimization for iOS and Android.
• AI & Personalization: Experience integrating AI-driven features, personalization, and search relevance into consumer-facing products.
• Global Scale Experience: Proven ability to design and launch products for diverse markets with localization and accessibility considerations.
• Cross-Functional Leadership: Demonstrated success influencing engineering, design, and marketing teams in a matrixed organization.

#MicrosoftAI 

This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

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.

Required Qualifications:

• Bachelor’s Degree AND 2+ years experience in product/service/program management or software development or equivalent experience.
• Solid product mindset grounded in customer needs, business outcomes, and quality at scale.
• Ability to own ambiguous problems end to end, from framing and discovery through delivery, iteration, and learning.
• Comfort designing experiments, reading data, and using evidence to make and explain product decisions.
• Familiarity with working on large, technically complex products and navigating tradeoffs between platform capabilities and product differentiation.
• Ability to manage multiple work streams in a fast moving environment while maintaining focus on what matters most.
• Willingness to act with a bias toward action, using AI assisted tools and workflows to test ideas quickly and avoid long dependency chains.
• Ability to create clarity through concise written and verbal communication with engineering, design, test partners, and leadership.
• 2+ years of experience building user facing products.
• Demonstrated ability to deliver meaningful user value at scale.
• Experience working across engineering, design, data, and go to market partners.
• Ability to influence without authority and collaborate effectively across teams.

Preferred Qualifications:

• Bachelor’s Degree AND 5+ years experience in product/service/program management or software development or equivalent experience.
• 4+ years of experience building user facing products.
• Experience working on consumer apps, mobile products, or platforms with large user bases.
• Familiarity with Chromium based browsers or browser platforms.
• Familiarity with experimentation, analytics, or growth loops.
• Experience working with LLM powered or agentic AI products.
• Hands on use of AI powered tools to improve product discovery, analysis, and execution.

#MicrosoftAI 

This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

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.

We are inviting you to join the Copilot Team, where we are redefining the future of AI-powered experiences. The Copilot Team is at the forefront of innovation, building intelligent solutions that empower users across devices with seamless connections to Windows, M365, and Azure. From AI-driven mobile applications to advanced cross-device capabilities, we are delivering transformative experiences.

Microsoft’s 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.

• Manage complex projects from conception to implementation, with a focus on delivering AI-driven user interfaces and performance-optimized web applications.
• Coordinate technical delivery through sprints, fostering collaboration throughout the project lifecycle.
• Collaborate across geographies and time zones to establish best practices and develop automated processes that mitigate development risks.
• Investigate and debug complex performance issues in applications, ensuring optimal user experience and system efficiency.
• Design and implement performance testing strategies to proactively address bottlenecks.
• Work closely with Product Designers, Product Managers, and Engineers to deliver AI-enhanced products that delight users.
• Drive team-wide investments in infrastructure and foundational systems to support long-term technical roadmaps.
• Solve technical challenges to deliver outstanding outcomes for customers and the business.

Required Qualifications:

• Bachelor’s Degree in Computer Science or related technical field AND 4+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
  • OR equivalent experience.
• 4+ years of experience building applications and services in the Cloud.
• Demonstrated experience with application security assessment
• Ability to communicate technical details clearly across organizational boundaries.
• Experience in DevOps to maintain live services andor application frameworks. 
• Fluency in English.
• Familiarity with Agile and iterative development processes.

Preferred Qualifications:

• Master’s Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
  • OR Bachelor’s Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
  • OR equivalent experience.
• Cloud and services experience, with Azure cloud experience.
• Excellent analytical skills with systematic and structured approach to software design.
• Passion for building highly scalable, highly reliable services.
• Experience with or exposure to Agile and iterative development processes.
• Experience/background in the Cloud Security.
• Familiarity with Microsoft Azure stack.
• Proven ability to build and maintain cross-functional relationships across teams.
• Solid problem-solving skills, teamwork, and a passion for delivering exceptional user experiences.

#MicrosoftAI #CopilotTeam

This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

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.

• Design, develop, and maintain scalable systems for growth experimentation, feedback loops, and data-driven insights.
• Build reusable components and architecture to support long-term sustainability and rapid iteration.
• Collaborate with Data Science teams to operationalize AI-first engineering solutions, including advanced AI solution, -powered insights and personalization systems.
• Implement intelligent experimentation frameworks to optimize user journeys and product features.
• Work closely with PMs, Data Scientists, and other engineers in mission-based crews to deliver milestones aligned with growth objectives.
• Ramp up quickly across different areas of the Edge codebase, embracing flexibility and breadth of expertise.
• Develop and refine KPIs dashboards, churn analysis systems, and attribution models to measure success and guide decisions.
• Ensure high-quality telemetry and experimentation infrastructure for global scale.

Required Qualifications:

• Bachelor’s Degree in Computer Science or related technical field AND 4+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
  • OR equivalent experience.
• Experience with distributed systems, data pipelines, and cloud services.
• Solid understanding of experimentation frameworks and data analytics.

Preferred Qualifications:

• Master’s Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
  • OR Bachelor’s Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
  • OR equivalent experience.
• Familiarity with AI/ML concepts and tools (Copilot, Spark, Kafka).
• Ability to work in fast-paced, mission-driven environments with cross-functional teams.
• Excellent communication skills and a growth mindset.

This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

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.

We are building the next generation of intelligent consumer devices, combining advanced hardware, connectivity, and AI to create seamless everyday experiences. Our team brings together specialists in acoustics, sensing, and system design, united by the goal of pushing the boundaries of what small, low-power devices can achieve.

As a firmware engineer on our team, you will play a key role in enabling real-time intelligence on resource-constrained hardware. Your work will involve designing and optimizing embedded systems, integrating sensors and connectivity modules, and ensuring ultra-low-power performance without compromising user experience. You will collaborate closely with cross-disciplinary experts in hardware, software, and AI to bring innovative ideas from prototype to product.

Microsoft’s 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.

• You’ll ensure wake word recognition is implemented and optimized at the firmware level for responsive on-device AI.
• You’ll develop and maintain firmware for Bluetooth and Wi-Fi modules, enabling seamless device connectivity.
• You’ll handle real-time processing of audio and visual data, optimizing performance and power efficiency on embedded hardware.
• You will work with partners to debug and fine-tune the device firmware, as well as optimize and review the firmware code.
• You’ll help implement high-performance solutions across teams while maintaining a quality checklist with help from other engineers. You’ll also monitor telemetry data and perform basic analyses under guidance to triangulate failures.
• You will respond to incidents by identifying the level of impact, troubleshooting basic issues, and deploying appropriate fixes. You’ll also develop an understanding of prescriptive guidance for security, privacy, and compliance standards.
• You will share information across disciplines within your feature team. You’ll also support your work with others by managing dependencies and actively seeking out essential information.
• You will improve the development and operations of systems, platforms, or product features by actively seeking to develop an understanding of key learnings, insights, and best practices. You’ll do this by participating in design reviews, incident drills and debriefs, and regular meetings.

• Bachelor’s Degree in Electrical Engineering, Computer Engineering, Computer Science, or related field AND 8+ years technical engineering experience

• • OR Master’s Degree in Electrical Engineering, Computer Engineering, Computer Science, or related field AND 6+ years technical engineering experience
  • OR Doctorate in Electrical Engineering, Computer Engineering, Computer Science, or related field AND 3+ years technical engineering experience
  • OR equivalent experience.
• Strong experience developing embedded firmware on SoCs from Realtek, BES, Qualcomm, or similar platforms, with deep understanding of low-power and real-time constraints.
• Proven experience in firmware development for wearable devices such as smart glasses or TWS earbuds, including audio, sensor, and connectivity modules.

#MicrosoftAI

This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

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.