Full-Time

Principal Software Engineer

Performance Tooling

Posted on 5/12/2026

Microsoft

Microsoft

10,001+ employees

Develops software, OS, and cloud services

Compensation Overview

$139.9k - $274.8k/yr

Company Historically Provides H1B Sponsorship

Washington, USA + 2 more

More locations: Redmond, WA, USA | Mountain View, CA, USA

In Person

Category
Software Engineering (1)
Required Skills
LLM
Python
Machine Learning
REST APIs
C/C++
Requirements
  • 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++, or Python OR equivalent experience.
  • Ability to meet Microsoft, customer and/or government security screening requirements are required for this role. This includes passing the Microsoft Cloud background check upon hire/transfer and every two years thereafter.
Responsibilities
  • Work across multiple layers of the AI software stack (abstractions, programming models, compilers, runtimes, libraries, and APIs) to enable large-scale model training and inference.
  • Benchmark OpenAI and other LLMs for performance on Graphic Processing Units (GPUs) and Microsoft hardware.
  • Debug, profile, and optimize performance for training/inference workloads on CPUs (Central Processing Units)/GPUs.
  • Monitor performance regressions and drive continuous improvements to reduce time-to-deploy and hardware footprint.
  • Collaborate across teams of researchers and engineers to deliver scalable, production-ready AI performance improvements.
Desired Qualifications
  • Master'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++, or Python
  • 4+ years’ practical experience working on high performance applications and performance debugging and optimization on CPUs/GPUs.
  • Experience in DNN/LLM inference and experience in one or more DL frameworks such as PyTorch, Tensorflow, or ONNX Runtime and familiarity with CUDA, ROCm, Triton.
  • Technical background and solid foundation in software engineering principles, computer architecture, GPU architecture, hardware neural net acceleration.
  • Experience in end-to-end performance analysis and optimization of state of the art LLMs and HPC applications, including proficiency using GPU profiling tools.
  • Cross-team collaboration skills and the desire to collaborate in a team of researchers and developers.
  • Ability to independently lead projects.

Microsoft develops software, devices, and cloud services. Windows is an operating system that runs on personal computers, Office provides productivity apps, and Azure offers cloud computing and developer tools. The company differentiates itself with a large, integrated ecosystem of software, devices, and services, plus long-standing partnerships with PC makers and a broad enterprise footprint. Its goal is to put a computer on every desk and in every home, and to extend that reach through cloud services, professional networking (LinkedIn), and gaming.

Company Size

10,001+

Company Stage

IPO

Headquarters

Redmond, Washington

Founded

1975

Simplify Jobs

Simplify's Take

What believers are saying

  • Azure grew 40% in fiscal Q3 2026, with AI run-rate reaching $37 billion.
  • Power Automate integrations, like GoFormz, deepen Microsoft workflow lock-in across enterprise systems.
  • Strong cash generation, $73 billion free cash flow, funds AI, cloud, and acquisitions.

What critics are saying

  • OpenAI can now use Amazon and Google, weakening Azure exclusivity.
  • Microsoft spent over $100 billion on OpenAI, yet recognized only $9.5 billion revenue.
  • Slower Azure growth and rising capex already triggered a 15% stock decline.

What makes Microsoft unique

  • Microsoft built dominance from MS-DOS, Windows, Office, Azure, and Xbox.
  • Its 1980 IBM PC deal created the software platform flywheel.
  • Microsoft now pairs enterprise software with AI via OpenAI and Copilot.

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Benefits

Health Insurance

Dental Insurance

Vision Insurance

401(k) Company Match

Professional Development Budget

Conference Attendance Budget

Flexible Work Hours

Remote Work Options

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

-1%

2 year growth

0%
Yahoo News Singapore
May 15th, 2026
Bill Ackman bets on Microsoft as AI winner, cites $200B OpenAI stake and Azure growth

Billionaire investor Bill Ackman has revealed new investments in Microsoft by both his hedge fund, Pershing Square Capital Management, and his closed-end fund Pershing Square USA. The positions were initiated in February after Microsoft's shares fell following second-quarter earnings. Ackman highlighted Microsoft's ownership of M365 and Azure, which is benefiting from surging AI inference demand. He noted the company traded at 21 times forward earnings in February, well below recent averages, and said its valuation doesn't reflect Microsoft's approximately 27% economic interest in OpenAI, worth roughly $200 billion. Microsoft shares have fallen about 15% this year. Ackman compared the investment to previous successful bets on Alphabet, Amazon and Meta, calling Microsoft's current valuation "highly compelling" for long-term value.

Tech in Asia
Apr 14th, 2026
Microsoft adds 30,000 Nvidia chips to Norway site after $6.2B commitment

Microsoft has secured a deal with neocloud provider Nscale to expand its Norway data centre site with 30,000 Nvidia chips. The agreement adds to Microsoft's earlier $6.2 billion commitment to the location, whilst OpenAI did not finalise a capacity agreement there. The move is part of Microsoft's roughly $60 billion spending wave on specialised neocloud providers that rent AI computing infrastructure. CEO Satya Nadella has identified power availability and data centre construction speed as the company's biggest bottleneck, rather than chip supply. The deal reflects how cheap electricity and clear regulations increasingly shape AI data centre locations. Nscale, a UK-based startup that emerged from crypto-mining firm Arkon Energy in 2024, raised $2 billion at a $14.6 billion valuation in March 2026.

Bloomberg L.P.
Apr 14th, 2026
Microsoft takes over $6.2B Stargate data centre from OpenAI in Norway

Microsoft has agreed to rent data centre capacity at a Norwegian site originally intended for OpenAI as part of its Stargate initiative. The company will rent 30,000 additional Nvidia Vera Rubin chips from neocloud provider Nscale at a campus inside the Arctic Circle in Narvik, Norway. The deal builds on Microsoft's prior $6.2 billion commitment at the same location. Nscale announced the agreement in a statement, marking a shift in the facility's intended purpose from OpenAI to Microsoft operations.

Yahoo Finance
Apr 14th, 2026
Microsoft stock down 23% despite Azure growing 39% and $625B revenue backlog

Microsoft shares have fallen 23.14% year-to-date to $370.87, despite strong Q2 FY2026 results showing non-GAAP EPS of $4.14, a 7.57% beat. Revenue reached $81.27 billion, up 16.72% year-over-year, with Azure growing 39%. The company's commercial remaining performance obligation surged 110% to $625 billion in contracted future revenue, providing multi-year visibility. Microsoft's OpenAI partnership includes a $250 billion incremental Azure services commitment, whilst the company holds a 27% stake valued at approximately $135 billion. Despite the decline, 95% of covering analysts remain bullish, with a consensus price target of $587.31. Analysts cite the year-to-date drop as creating an entry point for investors confident in Azure's AI growth trajectory.

The Register
Apr 14th, 2026
Microsoft hikes UK Surface prices by up to $280 as RAM shortage hits consumers

Microsoft has quietly raised UK prices for its Surface devices by £170 to £220, citing rising memory and component costs. The 13-inch Surface Laptop now starts at £1,099, up from £899 in February, whilst the 15-inch model has increased from £1,349 to £1,519. In the US, some configurations have jumped from $999 to $1,499, according to Windows Central. Microsoft acknowledged the increases are due to rising memory and component costs, as chip manufacturers prioritise high-bandwidth memory production, leaving DRAM and NAND supplies constrained. The changes were not announced; Microsoft simply updated pricing on its website and removed cheaper configurations. The memory shortage is affecting manufacturers across the board, from Chromebooks to Raspberry Pi devices, with geopolitical tensions and freight costs further driving prices higher.