Job description

Overview Microsoft AI is looking for a Member of Technical Staff – Capacity & Efficiency Infrastructure , to help us improve manage, and improve the efficiency of, our compute fleet. We’re seeking someone who brings an abundance of positive energy, empathy, and kindness to the team every day, in addition to being highly effective. The ideal candidate enjoys building world-class consumer experiences and products in a fast-paced environment. You will actively contribute to the development of AI models powering our innovative products. Expect to wear multiple hats and work across engineering, research, and everything in between. Your contributions will span model architecture, data curation, training and inference infrastructure, evaluation protocols, alignment and reinforcement learning from human feedback (RLHF), and many other exciting topics at the cutting edge of AI. Microsoft AI is building the training infrastructure that powers frontier-scale models and advances research toward humanist superintelligence. As a Member of Technical Staff – Capacity & Efficiency , you will contribute to a fast-moving codebase that enables training at an unprecedented scale. This role will require building software and mathematical models for measuring the effectiveness of our capacity usage and then developing tools and techniques to help us improve. This will require you to partner with ML researchers to scale up the latest research recipes, implement new forms of distributed training parallelism, and ensure the reliability and performance of thousands of GPUs across our supercomputing fleet. Profiling, benchmarking, debugging, and fine-grained optimization are core to this role, demanding both engineering rigor and creativity. Microsoft AI This role is part of Microsoft AI. Our Superintelligence team is a startup-like organization within Microsoft, dedicated to pushing the boundaries of artificial intelligence while maintaining a strong commitment to safety, responsibility, and human values. Our mission is to build AI that amplifies human potential and empowers people around the world. We strive to deliver breakthroughs that advance science, education, productivity, and global well-being. Thank you! We’re also fortunate to partner with incredible product teams giving our models the chance to reach billions of users and create immense positive impact. If you’re a brilliant, highly-ambitious and low ego individual, you’ll fit right in—come and join us as we work on our next generation of models! Starting January 26, 2026, MAI employees are expected to work from a designated Microsoft office at least four days a week if they live within 50 miles (U.S.) or 25 miles (non-U.S., country-specific) of that location. This expectation is subject to local law and may vary by jurisdiction. Responsibilities • Design, implement, test, and optimize distributed training infrastructure in Python and C++ for large-scale GPU clusters. • Build and evolve telemetry systems to provide visibility into infrastructure & ML model performance, utilization, and cost related metrics • Profile, benchmark, and debug performance bottlenecks across compute, memory, networking, and storage subsystems • Drive architectural improvements across various ML services which deliver measurable efficiency improvements • Build and evolve tools to automatically provide insights and recommendations to improve fleet-wide efficiency • Optimize collective communication libraries (e.g., NCCL) for emerging NVLink and InfiniBand topologies • Partner with ML researchers and infrastructure engineers to understand their plans and future needs and develop plans to balance growth with efficiency • Collaborate with hardware teams to optimize for next-generation accelerators (NVIDIA, MAIA, and beyond) • Embody our Culture and Values. Qualifications Required Qualifications: • Bachelor’s Degree in Computer Science, or related technical discipline AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python • OR equivalent experience Preferred Qualifications: • Bachelor’s Degree in Computer Science or related technical field AND 10+ years technical engineering experience with coding in languages including, but not limited to, C++ or Python OR Master’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++ or Python • OR equivalent experience • Deep understanding of the fundamentals of GPU architectures and DL/LLM architectures • Deep experience in profiling and analyzing performance in large-scale distributed computing systems. • Deep experience in profiling and analyzing performance in ML models especially GenAI models • Experience with low-level GPU programming (CUDA, Triton, NCCL) and frameworks such as PyTorch or JAX. • Experience in leading technical projects and supporting architectural decisions with data. • Experience building infrastructure for large-scale machine learning or generative AI workloads. • Experience in networking (InfiniBand, NVLink), storage systems, or distributed training parallelisms. • Track record of contributing to high-performance computing or large-scale AI infrastructure projects. Software Engineering IC4 - The typical base pay range for this role across the U.S. is USD $119,800 - $234,700 per year. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $160,200 - $261,000 per year. Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here: careers.microsoft.com Software Engineering IC5 - The typical base pay range for this role across the U.S. is USD $142,800 - $274,800 per year. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $188,000 - $304,200 per year. Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here: careers.microsoft.com 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.

Requirements

Must-haves

Microsoft AI is building the training infrastructure that powers frontier-scale models and advances research toward humanist superintelligence.
Microsoft AI
Our mission is to build AI that amplifies human potential and empowers people around the world. We strive to deliver breakthroughs that advance science, education, productivity, and global well-being.
Design, implement, test, and optimize distributed training infrastructure in Python and C++ for large-scale GPU clusters.
Build and evolve telemetry systems to provide visibility into infrastructure & ML model performance, utilization, and cost related metrics
Profile, benchmark, and debug performance bottlenecks across compute, memory, networking, and storage subsystems
Drive architectural improvements across various ML services which deliver measurable efficiency improvements
Build and evolve tools to automatically provide insights and recommendations to improve fleet-wide efficiency
Optimize collective communication libraries (e.g., NCCL) for emerging NVLink and InfiniBand topologies
Partner with ML researchers and infrastructure engineers to understand their plans and future needs and develop plans to balance growth with efficiency
Collaborate with hardware teams to optimize for next-generation accelerators (NVIDIA, MAIA, and beyond)
Embody our Culture and Values.
This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

Nice-to-haves

Deep understanding of the fundamentals of GPU architectures and DL/LLM architectures
Deep experience in profiling and analyzing performance in large-scale distributed computing systems.
Deep experience in profiling and analyzing performance in ML models especially GenAI models
Experience with low-level GPU programming (CUDA, Triton, NCCL) and frameworks such as PyTorch or JAX.
Experience in leading technical projects and supporting architectural decisions with data.
Experience building infrastructure for large-scale machine learning or generative AI workloads.
Experience in networking (InfiniBand, NVLink), storage systems, or distributed training parallelisms.
Track record of contributing to high-performance computing or large-scale AI infrastructure projects.
Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here:
Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here:

Application prep

Use the role’s language and application details while tailoring your materials.

Keywords to mirror

aimlpythonjavajavascriptllmmachine learning

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Effort: medium