# Mateo Weiner

![Mateo Weiner](/resources/cognition/portraits/mateo-weiner.webp)

![Mateo Weiner 2](/resources/cognition/portraits/mateo-weiner.webp)

Engineer at Cognition (Devin/Windsurf); ex-Palantir FDE and tech lead, ex-Google DeepMind Gemini intern; Cornell CS '25  
Cognition  
New York, New York, United States

## At Cognition

- Role: Engineer (Engineering)
- Joined: Aug 2026
- How they joined: Directly
- Before Cognition: Forward Deployed AI Engineer, Palantir Technologies
- Overlapped before Cognition with other Cognition people at: Amazon; Palantir (https://www.autumn.ai/resources/cognition/worked-together)

## Identity
- LinkedIn: https://www.linkedin.com/in/mateoweiner
- X: @mateow99
- GitHub: https://github.com/mateow99

## Notes
- Joined Cognition (maker of Devin, and owner of Windsurf) as an Engineer in New York in Aug 2026, coming straight from Palantir; LinkedIn does not specify which product (Devin vs Windsurf) he works on. (https://www.linkedin.com/in/mateoweiner)
- At Palantir Technologies (Jun 2025 - Aug 2026, New York) he was both a Forward Deployed AI Engineer and a Technical Lead; LinkedIn directory snippets show his headline as 'AI Tech Lead @ Palantir'. (https://www.linkedin.com/in/mateoweiner)
- The forward-deployed AI role at Palantir, where engineers sit with customers to ship agents, maps directly to Cognition's enterprise deployment of Devin. (https://www.linkedin.com/in/mateoweiner)
- On 2026-03-08 he defended Palantir publicly on X: 'If it takes a year to vibe code then you're still a year behind. We have a thousand devs building with AI so good luck catching up.' (https://x.com/mateow99/status/2030746080032465167)
- Cognition signed a definitive agreement to acquire Windsurf, the agentic IDE, including its IP, product and trademark, on 2025-07-14; he joined roughly 13 months after the deal. (https://cognition.com/blog/windsurf)
- Interned at Google DeepMind (Aug-Nov 2024, Mountain View) doing 'Machine Learning on Gemini'. (https://www.linkedin.com/in/mateoweiner)
- B.S. Computer Science, Cornell University (Aug 2021 - May 2025), Irwin Jacobs Dean's Scholar, minors in Electrical Engineering and Business. (https://www.linkedin.com/in/mateoweiner)
- Was a Backend Developer at Cornell App Development (AppDev), the student-run open-source team, from Feb 2022 to Jun 2023, and taught its Intro to Backend Development course in Spring 2023. (https://www.linkedin.com/in/mateoweiner)
- Public headline says "Engineer at Cognition". (https://www.linkedin.com/in/mateoweiner)
- His team won 'Best Backend' at the Cornell AppDev Hack Challenge for the app Cumulus, with Adam Cahall, Bella Hoie, Daniel Wei and Teresa Huang. (https://www.cornellappdev.com/courses/hack-challenge)
- In Mar 2026 he reposted Palantir's 'Forward Deployed Compute' sovereign AI reference architecture with NVIDIA and NHS Federated Data Platform results. (https://x.com/mateow99/status/2032654289026355281)
- Interned at Netflix (May-Aug 2024, Los Gatos) on 'Backend on Content Middleware Infra'. (https://www.linkedin.com/in/mateoweiner)
- He attended the Summer Science Program in 2020 as a Biochemistry Researcher, a selective pre-college residential research program. (https://www.linkedin.com/in/mateoweiner)
- Open source: github.com/mateow99/Cumulus-Backend, 'Backend code for Cumulus app', 'Written by: Mateo Weiner and Isabella Hoie'. (https://github.com/mateow99/Cumulus-Backend)
- Windsurf's own announcement 'The Next Chapter' said the team was 'joining forces' with Cognition after being acquired. (https://devin.ai/blog/windsurfs-next-chapter)
- He reposted Logan Kilpatrick's 'The future is agentic' in Dec 2024, right after his DeepMind Gemini internship; that early agent focus leads naturally to Cognition. (https://x.com/mateow99/status/1866667027202707702)
- Interned at Amazon (Jun-Aug 2023, Seattle) doing 'Full stack on PXT Craft'. (https://www.linkedin.com/in/mateoweiner)
- Listed as a TA (Wednesday 6:30-7:30pm, Hollister 312) for AppDev's Intro to Backend Development course in Spring 2022, alongside TAs Gonzalo Gonzalez and Kidus Zegeye. (https://backend-course.cornellappdev.com/deprecated/previous-semester-syllabi/sp22-syllabus)
- Previous roles include Forward Deployed AI Engineer at Palantir Technologies; Technical Lead at Palantir Technologies; Software Engineer Intern at Google DeepMind; Software Engineer Intern at Netflix; Software Engineer Intern at Amazon; Backend Developer at Cornell App Development (AppDev); Intro to Backend Development Course Instructor at Cornell App Development (AppDev); Biochemistry Researcher at The Summer Science Program. (https://www.linkedin.com/in/mateoweiner)
- Education history includes Bachelor of Science - BS, Computer Science, Cornell University. (https://www.linkedin.com/in/mateoweiner)
- Cognition researcher Deniz Birlikci's X page lists @mateow99 among his connections. (https://twstalker.com/denizbirlikci)
- On X (@mateow99, 99 followers) his bio reads 'software engineer | enjoy football soccer tennis skiing snowboarding' and still lists Menlo Park, CA. (https://x.com/mateow99)
- Location is New York, New York, United States. (https://www.linkedin.com/in/mateoweiner)

## Experience
- Engineer at Cognition - New York, United States (Aug 2026 - Present)
- Forward Deployed AI Engineer at Palantir Technologies - New York, New York, United States (Jun 2025 - Aug 2026)
- Technical Lead at Palantir Technologies - New York, New York, United States (Jun 2025 - Aug 2026)
- Software Engineer Intern at Google DeepMind - Mountain View, CA (Aug 2024 - Nov 2024): Machine Learning on Gemini
- Software Engineer Intern at Netflix - Los Gatos, CA (May 2024 - Aug 2024): Backend on Content Middleware Infra
- Software Engineer Intern at Amazon - Seattle, WA (Jun 2023 - Aug 2023): Full stack on PXT Craft
- Backend Developer at Cornell App Development (AppDev) (Feb 2022 - Jun 2023)
- Intro to Backend Development Course Instructor at Cornell App Development (AppDev) (Jan 2023 - May 2023)
- Biochemistry Researcher at The Summer Science Program (Jun 2020 - Jul 2020)

## Education
- Cornell University - Bachelor of Science - BS, Computer Science - (Aug 2021 - May 2025): Irwin Jacobs Dean's Scholar
Minors: Electrical Engineering and Business

## Sources
- https://www.linkedin.com/in/mateoweiner
- https://github.com/seancav03/Texas-Holdem-OCaml
- https://github.com/mateow99
- https://machronicle.com/boys-soccer-takes-control-of-the-pal-with-win-over-burlingame/
- https://devin.ai/blog/windsurfs-next-chapter
- https://cognition.com/blog/windsurf
- https://x.com/mateow99
- https://www.almanacnews.com/wp-content/uploads/2017/03/2017_03_01.alm_.section1.pdf
- https://www.cornellappdev.com/courses/hack-challenge
- https://github.com/mateow99/Cumulus-Backend
- https://github.com/akmatchev/LSTM-trader/
- https://twstalker.com/denizbirlikci
- https://backend-course.cornellappdev.com/deprecated/previous-semester-syllabi/sp22-syllabus
- https://devpost.com/mateow99
- https://x.com/mateow99/status/2030746080032465167
- https://x.com/mateow99/status/2032654289026355281
- https://x.com/mateow99/status/1866667027202707702


Researched with Autumn (https://www.autumn.ai) from public sources. Updated 2026-11-04. Profile: https://www.autumn.ai/resources/cognition/people/mateo-weiner · Everyone at Cognition: https://www.autumn.ai/resources/cognition/people