Principal Full-Stack Software Engineer - AI Experiences, Copilot Engineering

Posted 6 Days Ago
Be an Early Applicant
Mountain View, CA, USA
In-Office
143K-304K Annually
Senior level
Software • Quantum Computing • Metaverse • Infrastructure as a Service (IaaS)
The Role
Builds end-to-end AI Copilot experiences across voice, vision, text, and action. Owns features from concept through scalable production, collaborates with applied AI researchers, rapidly ships experiments, analyzes usage, and iterates on products used by millions. The role requires full-stack frontend and backend expertise, scalable web API development, strong Python skills, and comfort working in ambiguous, fast-moving environments.
Summary Generated by Built In
Overview

As Microsoft continues to push the boundaries of AI, we are on the lookout for passionate individuals to work with us on the most interesting and challenging AI questions of our time. Our vision is bold and broad — to build systems that have true artificial intelligence across agents, applications, services, and infrastructure. It’s also inclusive: we aim to make AI accessible to all — consumers, businesses, developers — so that everyone can realize its benefits. 

 

We build the cross-cutting capabilities that shape the future of human-AI interaction. Our work spans modalities—text, voice, vision, action—and pushes the boundaries of what intelligence can do in people's lives. We partner deeply with design, product, and applied AI to ship extraordinary experiences that define what Copilot becomes. The problems we solve don't fit neatly into one layer of the stack or one corner of the org—which is exactly what makes them interesting. Our mandate is to make Copilot the essential AI companion: ubiquitous, always capable, always there. We're building for a future where AI doesn't just respond—it acts, creates, and orchestrates. 

As a Principal Full-Stack Software Engineer on our AI Experiences, Copilot Engineering team, you'll build revolutionary experiences at the intersection of modality and intelligence. The pace is fast. The ambiguity is high. You'll ship things that millions of people use—and you'll ship things that don't exist anywhere else yet. 

If you want to work on well-scoped problems with clear answers, this isn't the team. If you want to define the future of how humans and AI live and work together, come build with us.


Starting January 26, 2026, AI Experiences 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. 

 
By applying to this U.S. Mountain View, CA position, you are required to be local to the greater San Fransisco Bay Area and in office 4 days a week. 

Responsibilities
  • Create breakthrough experiences that redefine what an AI companion can do 

  • Build across modalities—voice, vision, text, and action—to make Copilot feel seamless and alive 

  • Own features end-to-end, from concept through production, at scale 

  • Collaborate with applied AI researchers to bring cutting-edge model capabilities to users 

  • Ship experiments rapidly, learn from usage, and iterate toward experiences that feel like magic 

  • Work across team boundaries on problems that span the entire product 


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. 

  • 6+ years of experience with full-stack fundamentals across frontend (React, TypeScript) and backend systems. 

  • 6+ years of experience in Python or similar languages for backend development 

  • 6+ years of experience building scalable web APIs and services 

  • Comfort with ambiguity and the ability to move fast in loosely-defined problem spaces 

  • Experience with creating great product experiences and a drive to ship work that matters 



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.

Skills Required

  • Bachelor's degree in Computer Science or a related technical field and 6+ years of technical engineering experience with coding in C, C++, C#, Java, JavaScript, Python, or similar; equivalent experience accepted
  • Master's degree in Computer Science or a related technical field and 8+ years of technical engineering experience; equivalent experience accepted
  • Bachelor's degree in Computer Science or a related technical field and 12+ years of technical engineering experience; equivalent experience accepted
  • 6+ years of experience with full-stack fundamentals across frontend and backend systems, including React and TypeScript
  • 6+ years of experience in Python or similar languages for backend development
  • 6+ years of experience building scalable web APIs and services
  • Comfort with ambiguity and ability to move quickly in loosely defined problem spaces
  • Experience creating strong product experiences and motivation to ship impactful work

Microsoft Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Microsoft and has not been reviewed or approved by Microsoft.

  • Fair & Transparent Compensation Pay is presented as broadly competitive overall, with clear role/level/location variation and an emphasis on using posted ranges and band information for apples-to-apples comparisons.
  • Retirement Support Retirement benefits are described as a standout, highlighted by a strong 401(k) match structure and immediate vesting, plus additional plan features for tax-advantaged saving.
  • Parental & Family Support Family-oriented benefits are portrayed as a meaningful strength, with substantial paid parental leave and added supports like back-up care and adoption/surrogacy assistance.

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The Company
HQ: Redmond, WA
206,870 Employees
Year Founded: 1975

What We Do

At Microsoft, our mission is to empower every person and every organization on the planet to achieve more. Our mission is grounded in both the world in which we live and the future we strive to create. Today, we live in a mobile-first, cloud-first world, and the transformation we are driving across our businesses is designed to enable Microsoft and our customers to thrive in this world.

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