Applied AI Engineer Jobs in Sunnyvale, CA
Applied AI Engineer jobs in Sunnyvale, California concentrate in the Moffett Park tech corridor, the Murphy Avenue downtown district, and the Innovation Park area, with demand running strongest across enterprise software, semiconductor design, and cloud infrastructure. Employers actively hiring include Amazon, Google, and NEXXA. See the openings below and apply to the ones that match your experience.
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DESCRIPTION
AI models become more capable largely because of the learning environments, the RL gyms, in which they are trained. FAI builds those gyms and the platform that certifies them, so that model training teams across Amazon can rely on high-quality, graded assets. As a Principal on this team, you will set the technical direction for how these gyms and the tooling around them are built, evaluated, and scaled.
Key job responsibilities
As a Principal Applied Scientist with FAI, you will:
- Set technical direction across data collection, sampling, and evaluation for RL gyms focused on agentic tool use across a range of real-world domains.
- Design and lead experiments that produce reliable, efficient signal on what drives model improvement.
- Build gym-building tooling and automated quality control that scale with demand.
- Advance the science of how gyms are evaluated and validated before they're used in model training.
- Act as a hands-on technical leader: produce exemplary, high-quality assets yourself, and audit and support more junior scientists and engineers.
- Partner closely with domain experts and cross-functional teams, turning real-world problems into challenging, high-value tasks.
- Lead scientific reviews, scrutinize experimental design and verification, probe assumptions, and align teams toward coherent strategies. Contribute to hiring, mentorship, and the development of other scientists.
About the team
The FAI team has the mission to push the envelope in GenAI with LLMs, in order to provide the best-possible experience for our customers. We build frontier training and evaluation assets, RL gyms and the certification platform behind them, that directly shape how Amazon's models are trained and improved. We value scientific depth, hands-on building, and turning research into measurable impact at scale.
BASIC QUALIFICATIONS
- Experience programming in Java, C++, Python or related language
- PhD in Computer Science, Electrical Engineering, Mathematics, or a related technical field; or Master's degree with significant additional applied research experience.
- Strong hands-on experience building machine learning models and systems for real-world applications, with deep learning and neural methods.
- Experience with reinforcement learning and/or building RL gyms, learning environments, or agentic tool-use systems.
- Experience setting technical direction across data, modeling, and evaluation, and dealing with ambiguity and competing objectives.
- Experience leading experienced scientists/engineers and developing more junior members.
PREFERRED QUALIFICATIONS
- 10+ years of relevant work in industry or academia experience
- Experience building automated evaluation, quality-control, or verification tooling for training data or environments.
- Experience with agentic tool use and improving the capabilities of LLMs (for example multi-step, tool-using agents).
- Track record of creating novel algorithms and advancing the state of the art; peer-reviewed contributions in premier journals and conferences.
- Experience with large-scale distributed training/compute and modern ML frameworks.
Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status.
Los Angeles County applicants: Job duties for this position include: work safely and cooperatively with other employees, supervisors, and staff; adhere to standards of excellence despite stressful conditions; communicate effectively and respectfully with employees, supervisors, and staff to ensure exceptional customer service; and follow all federal, state, and local laws and Company policies. Criminal history may have a direct, adverse, and negative relationship with some of the material job duties of this position. These include the duties and responsibilities listed above, as well as the abilities to adhere to company policies, exercise sound judgment, effectively manage stress and work safely and respectfully with others, exhibit trustworthiness and professionalism, and safeguard business operations and the Company’s reputation. Pursuant to the Los Angeles County Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.
Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please visit https://amazon.jobs/content/en/how-we-hire/accommodations for more information. If the country/region you’re applying in isn’t listed, please contact your Recruiting Partner.
The base salary range for this position is listed below. Your Amazon package will include sign-on payments and restricted stock units (RSUs). Final compensation will be determined based on factors including experience, qualifications, and location. Amazon also offers comprehensive benefits including health insurance (medical, dental, vision, prescription, Basic Life & AD&D insurance and option for Supplemental life plans, EAP, Mental Health Support, Medical Advice Line, Flexible Spending Accounts, Adoption and Surrogacy Reimbursement coverage), 401(k) matching, paid time off, and parental leave. Learn more about our benefits at https://amazon.jobs/en/benefits.
USA, CA, Sunnyvale - 228,700.00 - 309,400.00 USD annually
USA, WA, Bellevue - 198,900.00 - 269,000.00 USD annually
DESCRIPTION
AI models become more capable largely because of the learning environments, the RL gyms, in which they are trained. FAI builds those gyms and the platform that certifies them, so that model training teams across Amazon can rely on high-quality, graded assets. As a Principal on this team, you will set the technical direction for how these gyms and the tooling around them are built, evaluated, and scaled.
Key job responsibilities
As a Principal Applied Scientist with FAI, you will:
- Set technical direction across data collection, sampling, and evaluation for RL gyms focused on agentic tool use across a range of real-world domains.
- Design and lead experiments that produce reliable, efficient signal on what drives model improvement.
- Build gym-building tooling and automated quality control that scale with demand.
- Advance the science of how gyms are evaluated and validated before they're used in model training.
- Act as a hands-on technical leader: produce exemplary, high-quality assets yourself, and audit and support more junior scientists and engineers.
- Partner closely with domain experts and cross-functional teams, turning real-world problems into challenging, high-value tasks.
- Lead scientific reviews, scrutinize experimental design and verification, probe assumptions, and align teams toward coherent strategies. Contribute to hiring, mentorship, and the development of other scientists.
About the team
The FAI team has the mission to push the envelope in GenAI with LLMs, in order to provide the best-possible experience for our customers. We build frontier training and evaluation assets, RL gyms and the certification platform behind them, that directly shape how Amazon's models are trained and improved. We value scientific depth, hands-on building, and turning research into measurable impact at scale.
BASIC QUALIFICATIONS
- Experience programming in Java, C++, Python or related language
- PhD in Computer Science, Electrical Engineering, Mathematics, or a related technical field; or Master's degree with significant additional applied research experience.
- Strong hands-on experience building machine learning models and systems for real-world applications, with deep learning and neural methods.
- Experience with reinforcement learning and/or building RL gyms, learning environments, or agentic tool-use systems.
- Experience setting technical direction across data, modeling, and evaluation, and dealing with ambiguity and competing objectives.
- Experience leading experienced scientists/engineers and developing more junior members.
PREFERRED QUALIFICATIONS
- 10+ years of relevant work in industry or academia experience
- Experience building automated evaluation, quality-control, or verification tooling for training data or environments.
- Experience with agentic tool use and improving the capabilities of LLMs (for example multi-step, tool-using agents).
- Track record of creating novel algorithms and advancing the state of the art; peer-reviewed contributions in premier journals and conferences.
- Experience with large-scale distributed training/compute and modern ML frameworks.
Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status.
Los Angeles County applicants: Job duties for this position include: work safely and cooperatively with other employees, supervisors, and staff; adhere to standards of excellence despite stressful conditions; communicate effectively and respectfully with employees, supervisors, and staff to ensure exceptional customer service; and follow all federal, state, and local laws and Company policies. Criminal history may have a direct, adverse, and negative relationship with some of the material job duties of this position. These include the duties and responsibilities listed above, as well as the abilities to adhere to company policies, exercise sound judgment, effectively manage stress and work safely and respectfully with others, exhibit trustworthiness and professionalism, and safeguard business operations and the Company’s reputation. Pursuant to the Los Angeles County Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.
Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please visit https://amazon.jobs/content/en/how-we-hire/accommodations for more information. If the country/region you’re applying in isn’t listed, please contact your Recruiting Partner.
The base salary range for this position is listed below. Your Amazon package will include sign-on payments and restricted stock units (RSUs). Final compensation will be determined based on factors including experience, qualifications, and location. Amazon also offers comprehensive benefits including health insurance (medical, dental, vision, prescription, Basic Life & AD&D insurance and option for Supplemental life plans, EAP, Mental Health Support, Medical Advice Line, Flexible Spending Accounts, Adoption and Surrogacy Reimbursement coverage), 401(k) matching, paid time off, and parental leave. Learn more about our benefits at https://amazon.jobs/en/benefits.
USA, CA, Sunnyvale - 228,700.00 - 309,400.00 USD annually
USA, WA, Bellevue - 198,900.00 - 269,000.00 USD annually
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Find Applied AI Engineer JobsApplied AI Engineer Job Market in Sunnyvale
Who's Hiring
- Amazon83
- Google59
- NEXXA12N
- Walmart12
- DoorDash12
Top Industries Hiring
- Technology & Software
- Cybersecurity
Applied AI Engineer Jobs in Sunnyvale: Frequently Asked Questions
How do I get a applied ai engineer job in Sunnyvale?
The strongest path in Sunnyvale is targeting the dense cluster of enterprise software and semiconductor companies in Moffett Park and the surrounding corridors, where applied AI work focuses on production model deployment, inference optimization, and developer tooling. Candidates who can show shipped AI products alongside hands-on experience in MLOps pipelines or LLM fine-tuning stand out. Networking through Sunnyvale-based tech meetups and internal referrals at large campuses nearby also opens doors faster than cold applications.
Which companies hire applied ai engineers in Sunnyvale?
Companies currently hiring applied ai engineers in Sunnyvale include Amazon, Google, and NEXXA, per current listings on Migrate Mate as of November 2026. Sunnyvale's employer mix leans toward established tech firms with large AI research divisions alongside a steady stream of well-funded AI-focused startups based in the city's innovation corridors.
Are there remote applied ai engineer jobs in Sunnyvale?
Yes, though applied ai engineer roles vary widely, with hands-on infrastructure and on-device model work requiring on-site presence while research, evaluation, and prompt engineering tasks are often fully remote. About 26% of applied ai engineer openings tied to Sunnyvale are remote or hybrid as of November 2026, reflecting the broader flexibility large Sunnyvale tech employers have maintained. Roles centered on model evaluation, data pipeline design, and API integration tend to offer the most remote flexibility locally.
How can I get a applied ai engineer job in Sunnyvale with little or no experience?
The most realistic entry path in Sunnyvale is landing a contract or associate ML engineer role at one of the city's mid-size AI software companies, which hire earlier-career candidates more regularly than the large campuses do. Building a visible portfolio of deployed AI projects, such as fine-tuned models on public datasets or production-ready inference apps, carries more weight locally than credentials alone. Entry roles in QA for AI systems, data annotation engineering, and AI product support at Sunnyvale employers also serve as common stepping stones into fully applied engineering positions.
Which industries hire the most applied ai engineers in Sunnyvale?
Most applied ai engineer openings in Sunnyvale sit in Technology & Software and Cybersecurity, per current listings on Migrate Mate as of November 2026. Sunnyvale's concentration of semiconductor design firms, cloud platform providers, and enterprise software companies creates sustained baseline demand for applied AI talent that remains relatively stable even when broader tech hiring slows.
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See All 201+ Applied AI Engineer Jobs in Sunnyvale
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