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Daniel De FreitasDaniel De Freitas

Daniel De Freitas

Research Scientist / Google DeepMind

Daniel De Freitas is a prominent AI researcher and entrepreneur, currently serving as a Research Scientist at Google DeepMind. He is the co-founder and former President of Character.AI, a popular conversational AI platform. Prior to Character.AI, he was a key figure at Google, where he started and led the development of the groundbreaking conversational AI models Meena and LaMDA at Google Brain.

Engineer's degree, USP - Universidade de São Paulo
United States
TwitterTwitter
LinkedInLinkedIn2.7K
Artificial IntelligenceDeep LearningEntrepreneurshipConversational AI
1 (Character.AI)
Companies Founded
2 (Meena/LaMDA)
Key AI Models Led
~8 years
Years at Google/DeepMind
2.7K
LinkedIn Followers
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Work Experience

Google DeepMindGoogle DeepMind
Google DeepMind

Research Scientist

Aug 2024 - Present
Position
Research Scientist
Character.AICharacter.AI
Character.AI

President / Co-founder

Nov 2021 - Aug 2024
Responsibilities
President and co-founder at www.Character.AI - worked towards giving every person on earth access to their own deeply personalized superintelligence to help them live their best lives! https://www.nytimes.com/2023/01/10/science/character-ai-chatbot-intelligence.html https://Character.AI lets you create and talk to advanced AI (language tutors, text adventure games, celebrities, talking animals + more).
GoogleGoogle
Google

Senior Staff Software Engineer

Oct 2021 - Nov 2021
Responsibilities
Led LaMDA at Google Brain. LaMDA in Sundar's Keynote: https://youtu.be/Mlk888FiI8A?t=995 Senior Staff Software Engineer
GoogleGoogle
Google

Staff Research Engineer

Oct 2020 - Oct 2021
Responsibilities
Started and led LaMDA at Google Brain. LaMDA in Sundar's Keynote: https://youtu.be/Mlk888FiI8A?t=995 https://www.blog.google/technology/ai/lamda Google Brain: https://www.nytimes.com/2018/02/19/technology/ai-researchers-desks-boss.html Also published about Meena: https://ai.googleblog.com/2020/01/towards-conversational-agent-that-can.html https://www.youtube.com/watch?v=cA0vHYzGR8s Staff Research Engineer Oct 2020 - Oct 2021 · 1 yr 1 mo
GoogleGoogle
Google

Senior Research Engineer

Oct 2018 - Oct 2020
Responsibilities
Started and led Project Meena (later renamed to LaMDA), open-domain conversational AI research, at Google Brain. Article: https://venturebeat.com/2020/01/28/meena-is-googles-attempt-at-making-true-conversational-ai/ More news articles: https://www.google.com/search?q=meena+chatbot&tbm=nws Blog post: https://ai.googleblog.com/2020/01/towards-conversational-agent-that-can.html Paper: https://arxiv.org/abs/2001.09977 Senior Research Engineer
GoogleGoogle
Google

Senior Software Engineer

Apr 2018 - Oct 2018
Responsibilities
Machine Learning modeling/experimentation and serving at Google scale applied to text and video understanding for YouTube in production. Senior Software Engineer
GoogleGoogle
Google

Software Engineer III

Dec 2016 - Apr 2018
Responsibilities
Machine Learning modeling/experimentation and serving at Google scale applied to text and video understanding for YouTube in production. Software Engineer III Dec 2016 - Apr 2018 · 1 yr 5 mos
Microsoft BingMicrosoft Bing
Microsoft Bing

Software Engineer II

Jan 2016 - Nov 2016
Responsibilities
Worked on very large-scale Natural Language Processing and Deep Learning for Automatic Open Domain Question answering that shows at the top of Bing results. Example output: https://www.bing.com/search?q=seabiscuit+burial+site Software Engineer II
Microsoft BingMicrosoft Bing
Microsoft Bing

Software Engineer II

Sep 2014 - Dec 2015
Responsibilities
Designed and implemented first version of the recommender system to empower users of the Microsoft Project Services solution built on Microsoft Dynamics CRM. Software Engineer II Sep 2014 - Dec 2015 · 1 yr 4 mos
Microsoft BingMicrosoft Bing
Microsoft Bing

Software Engineer

Oct 2012 - Sep 2014
Responsibilities
Designed and implemented advanced project management tools that enable project managers to easily create detailed Work Breakdown Structures (aka WBS) which are seamlessly integrated with project accounting and resource management features. Built for the Service Industries module in Microsoft Dynamics AX. Software Engineer Oct 2012 - Sep 2014 · 2 yrs

Education

USP - Universidade de São PauloUSP - Universidade de São Paulo
USP - Universidade de São Paulo

Engineer's degree

2007 - 2011
Field of Study
Engineer's degree - Computer Engineering
Stanford UniversityStanford University
Stanford University

CS231n: Convolutional Neural Networks for Visual Recognition

2017
Field of Study
CS231n: Convolutional Neural Networks for Visual Recognition
Stanford UniversityStanford University
Stanford University

CS224d: Deep Learning for Natural Language Processing

2016
Field of Study
CS224d: Deep Learning for Natural Language Processing
Stanford UniversityStanford University
Stanford University

CS229: Machine Learning

2015
Field of Study
CS229: Machine Learning

Media Coverage

Ex-Google engineers from Character.AI rejoin company with AI partnershipEx-Google engineers from Character.AI rejoin company with AI partnership
Ex-Google engineers from Character.AI rejoin company with AI partnership

Daniel De Freitas and Noam Shazeer, co-founders of Character.AI, rejoined Google's AI unit DeepMind, two years after leaving their engineering roles to launch the startup. This move was part of a licensing agreement for Character.AI's technology.

Aug 2, 2024
N/A
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The New A.I. Deal: Buy Everything but the CompanyThe New A.I. Deal: Buy Everything but the Company
The New A.I. Deal: Buy Everything but the Company

Mr. Shazeer and Mr. De Freitas, who co-founded Character.AI and raised nearly $200 million, announced their return to Google, highlighting a trend of AI founders jumping ship for Big Tech.

Aug 8, 2024
N/A
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For Reported $2.5B, Google Brings Top Character.AI Researchers BackFor Reported $2.5B, Google Brings Top Character.AI Researchers Back
For Reported $2.5B, Google Brings Top Character.AI Researchers Back

The article discusses the return of Google defectors Noam Shazeer and Daniel De Freitas to Google DeepMind, leaving Character.AI, the AGI company they co-founded in 2021, in a reported $2.5 billion deal.

Aug 7, 2024
N/A
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Google engineers had built ChatGPT-like AI years ago but were told it was not safeGoogle engineers had built ChatGPT-like AI years ago but were told it was not safe
Google engineers had built ChatGPT-like AI years ago but were told it was not safe

The report details how Google engineers, including Daniel De Freitas, had developed a ChatGPT-like AI (Meena/LaMDA) years ago as a side project while he was working on YouTube-related AI.

May 21, 2025
N/A
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Technical Expertise

Daniel De Freitas possesses deep expertise in the full lifecycle of AI development, from foundational research in conversational models like LaMDA and Meena to the commercial scaling of consumer-facing AI products at Character.AI. His technical skills span core software engineering, large-scale machine learning, and natural language processing.

Artificial Intelligence & ML
Machine LearningDeep LearningNatural Language ProcessingArtificial Neural NetworksNatural Language Understanding
Programming & Frameworks
Software EngineeringSoftware DevelopmentPythonC++C#

Key Achievements

Microsoft High Potential Development Program

Recognized for high potential and leadership capabilities within Microsoft's development organization.

Best Graduation Engineering Project

Awarded for the best graduation engineering project for the creation of an autonomous delivery robot.

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