Jobs in the United States

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Added 2 mins ago
B
Building Operations Supervisor II
BCPS
Chase, MD
- $20.72 to $31.28 USD / hour
One year’s experience as supervisor, assistant supervisor, and/or lead worker.
Added 4 mins ago
Lead Full Stack Engineer, Wealth Management Technology
Raymond James & Associates, Inc.
Saint Petersburg, FL
We are seeking a Lead Full Stack Engineer to drive the design and development of enterprise applications supporting Wealth Management.
Added 4 mins ago
Sr. Sys Engineer
Berkley
Wilmington, DE
Serve as primary engineer and platform owner for the enterprise Amazon Connect environment, designing, building, and maintaining contact flows, flow modules, queues, routing profiles, hours…
Added 4 mins ago
Sr. Engineer, Enterprise Patch & Vulnerability Management
Berkley
Wilmington, DE
The Sr. Engineer, Enterprise Patch & Vulnerability Management serves as the technical engineering lead for VIPR (Vulnerability Incident Prevention & Remediation), the enterprise capability…
Added 8 mins ago
CA
HVAC Mechanic Lead – Denver International Airport
City and County of Denver
United States
- $39 to $43 USD / hour
…position for you! Denver International Airport is seeking a Lead HVAC Mechanic to join our close-knit Facility Maintenance team. This position will allow you to gain leadership experience…
Added 12 mins ago
BT
Senior Components Engineer (BT-26217)
Bastion Technologies
Cypress, CA
- $140,000 to $165,000 USD / year
The Senior Components Engineer will support the various projects located in the Los Angeles, CA.
Added 12 mins ago
BT
Senior Components Engineer (BT-26216)
Bastion Technologies
Pasadena, CA
- $140,000 to $165,000 USD / year
The Senior Components Engineer will support the various projects located in the Pasadena, CA.
Added 14 mins ago
Lead AI/ML Ops Engineer
Lincoln Financial
Radnor, PA
Added 14 mins ago
Lead Identity Infrastructure Engineer
Lincoln Financial
Greensboro, NC
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Added 15 mins ago
Analyst, Data & Software Engineer
Ovative Group, LLC
United States
At Ovative, culture isn’t a buzzword - it’s the reason we’ve been named a Top Workplace for ten years running. We lead with trust, transparency, and a commitment to doing the hard work…
Added 15 mins ago
R&D Engineer – Advanced Welding Materials & Processes (EI/EII)
General Dynamics Electric Boat
Groton, CT
Evaluate new developments in the welding and additive manufacturing fields (such as processes and equipment) for possible application to current welding problems or production processes.
Added 16 mins ago
2027 Enterprise Resiliency Modeling and Simulation Engineer
The Aerospace Corporation
El Segundo, CA · Chantilly, VA
…concept and architecture design to performance assessment to application of space-enabled mission…
Added 16 mins ago
Senior DSP/SDR Engineer
The Aerospace Corporation
Chantilly, VA
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Added 16 mins ago
Spacecraft Thermal Engineer
The Aerospace Corporation
El Segundo, CA · Chantilly, VA
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Added 16 mins ago
Solution Accelerator Systems Lead
The Aerospace Corporation
El Segundo, CA
As the Solution Accelerator Systems Lead (Project Leader/Senior Project Leader - Engineering Program Management), you will lead studies and use your deep technical expertise and thought…
Added 16 mins ago
Senior Modeling and Simulation Communications Engineer
The Aerospace Corporation
El Segundo, CA · Colorado Springs, CO
…concept and architecture design to performance assessment to application of space and space-enabled…
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Sr. Manufacturing & Controls Engineer
Clarios, LLC
MO
A hands-on manufacturing engineer with strong controls and automation experience who can troubleshoot complex production equipment, lead technical projects, and collaborate effectively…
Added 16 mins ago
Senior Electromagnetic Compatibility (EMC) Engineer
The Aerospace Corporation
El Segundo, CA · Huntsville, AL · Houston, TX · Chantilly, VA · Albuquerque, NM
Added 16 mins ago
Senior Communication Architect and Engineer
The Aerospace Corporation
El Segundo, CA
Lead long-range technical studies on space-based communication systems - including commercial pLEO and MEO constellations, next-generation cellular, hybrid military and commercial systems…
Added 16 mins ago
SPACE NORTH Theater Support Lead
The Aerospace Corporation
Peterson SFB, CO · Colorado Springs, CO
…concept and architecture design to performance assessment to application of space and space-enabled…
Added 16 mins ago
MEO Missile Warning & Tracking (MWT) SEIT Engineer
The Aerospace Corporation
El Segundo, CA · Aurora, CO · Colorado Springs, CO
…orbit (MEO). As the MEO Missile Warning & Tracking (MWT) SEIT Engineer, you will play an important role in the transition to a new proliferated Overhead Persistent Infrared (OPIR) MEO…
Added 16 mins ago
MEO Missile Warning & Tracking (MWT) Lead SEIT Engineer
The Aerospace Corporation
El Segundo, CA · Aurora, CO · Colorado Springs, CO
…Earth orbit (MEO). As the MEO Missile Warning & Tracking (MWT) Lead SEIT Engineer, you will play a pivotal role in the transition to a new proliferated Overhead Persistent Infrared (OPIR)…
Added 16 mins ago
Kubernetes Engineer
The Aerospace Corporation
El Segundo, CA · Chantilly, VA
The Aerospace Corporation is seeking a skilled Kubernetes Engineer (Technical and Cloud Computing Engineer Staff IV/V) with expertise in Kubernetes, Linux, programming, and automation. In…
Added 16 mins ago
Digital Communication DSP Engineer
The Aerospace Corporation
El Segundo, CA
…Then a role as a Digital Communications & Signal Processing Engineer in the Digital Communication Implementation Department (DCID), under The Aerospace Corporation’s Mission Payloads…
Added 16 mins ago
Engineer/ Senior Engineer - Welding
Dominion Energy
WATERFORD, CT
Millstone Power Station is looking for an experienced, solutions-oriented Welding Engineer, Senior Welding Engineer, or Staff Welding Engineer to lead the Welding and ASME XI…

Microsoft

Principal Software Engineer - AI Infrastructure

WA, United States
Redmond, WA, United States
Redmond, United States

$142,800 to $304,200 USD / year

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Job details

Pay: $142,800 to $304,200 USD / year
Apply by: May 2, 2027
Posting language: English
Posted: Nov 3, 2026

Original job description

Overview

Help build the infrastructure that trains the next generation of agentic Artificial Intelligence (AI) models at Microsoft. The Cloud + AI (C+AI) organization builds the end-to-end AI stack that powers innovation across Azure and Microsoft. The Foundry, Inference and Training (FIT) Training Team is where frontier-scale model training meets production-grade engineering. You will work alongside engineers and researchers to advance the scientific methods and scalable infrastructure used to train Large Language Models (LLMs), Small Language Models (SLMs), and agentic models, spanning both proprietary and open-weight models and building on open-source training frameworks. Your work will directly shape how reliable, enterprise-grade agentic workflows are built across the company and experienced by the customers who depend on them.

As a Principal Software Engineer on this team, you will own the architecture and technical direction of major components of the training platform and drive them from ambiguous problem statements through production operation. You will keep the customer at the center of every decision, partnering directly with the researchers and product teams who rely on the platform to understand their needs, remove friction, and measure success by their outcomes. You will set the technical bar for the team through design leadership, code and test-strategy reviews, and mentorship, and you will partner across C+AI and with partner organizations to align infrastructure roadmaps with model training and evaluation needs. This opportunity will allow you to deepen your expertise in large-scale distributed systems for AI training, develop firsthand understanding of how frontier proprietary and open-weight models are trained and evaluated, and grow your influence as a technical leader who shapes architecture, engineering practices, and the next generation of engineers on a fast-moving, startup-style team.

We are looking for a curious, independent, adaptable, and customer-obsessed problem-solver who thrives on continuous learning, is energized by evolving priorities, and is motivated by the impact your work has on the people who use it. You write efficient, well-tested code, enjoy debugging hard problems in complex distributed systems, and share what you learn. You iterate quickly, adjust course when the evidence calls for it, and collaborate effectively in a dynamic environment. 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

Responsibilities

Own the architecture and technical direction of major components of the training platform for Large Language Models (LLMs), Small Language Models (SLMs), multimodal, code-specific, and open-weight models, ensuring designs meet scalability, reliability, security, and cost-efficiency requirements.
Partner directly with customers, including researchers and product teams across Microsoft, to understand their training and evaluation needs, translate them into platform requirements, and measure success through customer experience and outcomes.
Drive ambiguous, multi-quarter initiatives from proposal to production, breaking work into milestones, identifying dependencies, and negotiating ownership and delivery commitments with partner teams across Cloud + AI (C+AI).
Build on and extend open-source training frameworks (for example, PyTorch, DeepSpeed, Megatron-LM, and Hugging Face libraries), adapting them for proprietary and open-weight models and contributing improvements back to the community where appropriate.
Design and build services that serve production traffic while meeting Microsoft security, privacy, Responsible AI, and compliance requirements, including auditable evidence of compliance.
Lead debugging and resolution of complex issues in distributed training jobs and production services; participate in the on-call rotation as a Designated Responsible Individual (DRI), lead incident retrospectives, and improve troubleshooting guides, testing, safe deployment, and monitoring.
Mentor engineers and raise the technical bar through design reviews, code reviews, and ownership of the team's test strategy, while championing AI-assisted engineering tools and practices across the software development lifecycle.

Qualifications

Required Qualifications:

Bachelor'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 equivalent experience.

Preferred Qualifications:

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, C++, C#, Java, JavaScript, or Python OR Bachelor's Degree in Computer Science or related technical field AND 12+ 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 designing, building, and operating large-scale distributed systems or cloud platforms with end-to-end ownership of production services, including Kubernetes-based containerized platforms on Microsoft Azure, Amazon Web Services (AWS), or Google Cloud, control-plane or backend services that manage compute, storage, and networking, and secure multi-tenant designs covering authentication, authorization, workload identity, quota management, and isolation.
3+ years building machine learning training infrastructure, such as Graphics Processing Unit (GPU) cluster scheduling, data pipelines, and checkpointing and storage systems, using open-source training frameworks such as PyTorch Fully Sharded Data Parallel (FSDP), DeepSpeed, Megatron-LM, Hugging Face Transformers and Accelerate, or Ray Train; contributions to open-source projects are a strong plus.
2+ years training, fine-tuning, or evaluating open-weight models (for example, Llama, Mistral, Phi, Qwen, or DeepSeek model families) at multi-node scale.
2+ years building or operating Reinforcement Learning (RL) post-training pipelines for Large Language Models (LLMs) and agentic models using verl, slime, MILES, or comparable frameworks, with a demonstrated understanding of the end-to-end training stack, including pretraining and post-training frameworks, Reinforcement Learning Environments (RLEs), rollout inference engines (for example, vLLM or SGLang), evaluation, and checkpointing, and how design choices at each layer affect throughput, stability, and cost.
3+ years serving as an on-call or Designated Responsible Individual (DRI) engineer for production services operating against defined availability or latency targets, including incident response, postmortems, structured logging, distributed tracing, dashboards, alerting, automated validation, and incident playbooks.
2+ years partnering directly with internal or external customers to define requirements, instrument customer experience (for example, adoption, satisfaction, or time-to-first-result metrics), and prioritize engineering work by customer impact.
Experience leading technical design across 2+ teams, driving ambiguous multi-quarter initiatives to completion, and mentoring senior engineers.

#AIPLATFORM #AIINFRA

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: https://careers.microsoft.com/us/en/us-corporate-pay

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.

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More about this job

Skills

Scientific research methodology
Leadership
Debugging
Customer experience
PyTorch
Hugging Face
Troubleshooting
Software development
Computer science
C
C++
C#
Oracle Java
JavaScript
Python
Kubernetes
Microsoft Azure
AWS
Google Cloud
Machine learning
Scheduling
Incident response
Coaching

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