# Young Jean Han

Software Engineer at Cognition (Devin); ex-Jane Street, Nuro; CMU CS  
Cognition  
New York, New York, United States

## At Cognition

- Role: Software Engineer (Engineering)
- Joined: Sep 2025
- How they joined: Directly
- Before Cognition: Software Engineer, Jane Street
- Overlapped before Cognition with other Cognition people at: Nuro; Jane Street; Pure Storage (https://www.autumn.ai/resources/cognition/worked-together)

## Identity
- LinkedIn: https://www.linkedin.com/in/youngjeanhan
- Domain: cognition.ai

## Notes
- On 2026-10-19 Han reposted Cognition's launch of efficiency-based cost controls (Efficiency Score, Devin Coach, efficiency-based approvals) with: "this is our first step towards an effective and sustainable growth of the future of software engineering." The 'our first step' framing hints Han was close to the AI-spend allocation work. (https://www.linkedin.com/posts/youngjeanhan_what-if-your-ai-budget-went-to-the-engineers-activity-7517992890493595648-_7lr)
- Reposted Cognition's Devin 2.2 launch on 2026-02-24 with: "our team has put a lot of thought and effort into using Devin a pleasant experience". (https://www.linkedin.com/posts/youngjeanhan_introducing-devin-22-the-autonomous-agent-activity-7432117941086732289-NCcV)
- Software Engineer at Cognition in New York since September 2025, building on Devin, Cognition's autonomous AI software engineer. (https://www.linkedin.com/in/youngjeanhan)
- Current role is Software Engineer at Cognition. (https://www.linkedin.com/in/youngjeanhan)
- Cognition's Devin 2.2 blog (2026-02-24) calls the release one of the biggest updates to Devin since launch, aimed at making Devin the most autonomous agent; Han publicly promoted it the same day.
- Software Engineer at Nuro, the autonomous delivery vehicle company, from Jan 2019 to Jul 2020, the first full-time job after CMU. (https://www.linkedin.com/in/youngjeanhan)
- The linked Devin blog post argues "Blanket usage caps are akin to a hiring freeze in the AI era" and introduces Efficiency Score, Devin Coach, and efficiency-based approvals for enterprises.
- Cognition teammate Giovanni D'Antonio posted minutes after Han on 2026-10-19 about how Cognition's incentives align with customers' around token spend, the same theme as Han's post. (https://www.linkedin.com/posts/giovanni-dantonio_one-underrated-benefit-of-working-at-cognition-activity-7517994151037190144-GFO1)
- B.S. in Computer Science at Carnegie Mellon (2015-2018) with a minor in Mathematical Sciences, listed in the CMU 2019 commencement program under the School of Computer Science.
- Interned on the Query Processing Team at MemSQL (now SingleStore) in summer 2018, San Francisco Bay Area. (https://www.linkedin.com/in/youngjeanhan)
- Interned on the performance team at Pure Storage in summer 2017: reduced CPU usage on an I/O path between storage devices in C++ and cut the size of performance-result CSV files as a Python side project. (https://www.linkedin.com/in/youngjeanhan)
- Teaching Assistant at Carnegie Mellon for 15-112 Fundamentals of Programming (Spring and Fall 2016) and 15-251 Great Theoretical Ideas in Computer Science (Spring 2017, Spring 2018). (https://www.linkedin.com/in/youngjeanhan)
- Built 'Beat Runner' as a 15-112 term project at CMU in Fall 2015; it is listed in the course's term-project gallery with two YouTube demo videos, the earliest public trace of shipped software.
- Previous roles include Software Engineer at Jane Street; Software Engineer at Nuro; Software Engineering Intern at MemSQL; Software Engineering Intern at Pure Storage; Teaching Assistant at Carnegie Mellon University. (https://www.linkedin.com/in/youngjeanhan)
- Education history includes Bachelor of Science (B.S.), Computer Science, Carnegie Mellon University. (https://www.linkedin.com/in/youngjeanhan)
- Previous roles include Software Engineer at Cognition; Software Engineer at Jane Street; Software Engineer at Nuro; Software Engineering Intern at MemSQL; Software Engineering Intern at Pure Storage; Teaching Assistant at Carnegie Mellon University. (https://www.linkedin.com/in/youngjeanhan)
- Named to a CMU Fall 2016 Dean's List.
- Location is New York, New York, United States. (https://www.linkedin.com/in/youngjeanhan)
- Lists English and Korean as native or bilingual languages. (https://www.linkedin.com/in/youngjeanhan)

## Experience
- Software Engineer at Cognition - New York, New York, United States (Sep 2025 - Present)
- Software Engineer at Jane Street (Aug 2020 - Aug 2025)
- Software Engineer at Nuro (Jan 2019 - Jul 2020)
- Software Engineering Intern at MemSQL - San Francisco Bay Area (Jun 2018 - Aug 2018): Query Processing Team
- Software Engineering Intern at Pure Storage - Mountain View, CA (May 2017 - Aug 2017): Worked in performance team to improve an I/O performance of the FlashArray.
Reduced CPU usage during an I/O path between storage devices (C++).
Reduced CSV file size of performance result as a side project (Python).
- Teaching Assistant at Carnegie Mellon University - Greater Pittsburgh Area (Jan 2016 - May 2017): 15-112 Fundamentals of Programming (Spring 2016, Fall 2016)
15-251 Great Theoretical Ideas in Computer Science (Spring 2017, Spring 2018)
Reduced CPU usage during an I/O path between storage devices (C++).
Reduced CSV file size of performance result as a side project (Python).
15-251 Great Theoretical Ideas in Computer Science (Spring 2017, Spring 2018)

## Education
- Carnegie Mellon University - Bachelor of Science (B.S.), Computer Science - (Jan 2015 - Jan 2018)
- Carnegie Mellon University - Bachelor of Science (B.S.), Computer Science - (Jan 2015 - Dec 2018)

## Sources
- https://www.linkedin.com/in/youngjeanhan
- https://www.linkedin.com/posts/youngjeanhan_introducing-devin-22-the-autonomous-agent-activity-7432117941086732289-NCcV
- https://www.linkedin.com/posts/youngjeanhan_what-if-your-ai-budget-went-to-the-engineers-activity-7517992890493595648-_7lr
- https://www.linkedin.com/posts/giovanni-dantonio_one-underrated-benefit-of-working-at-cognition-activity-7517994151037190144-GFO1
- https://cognition.ai/blog/windsurf
- https://cognition.ai/blog/introducing-devin-2-2
- https://devin.ai/blog/efficiency-based-cost-controls
- https://www.kosbie.net/cmu/fall-15/15-112/gallery.html
- https://www.cmu.edu/commencement/assets/finalprogram2019web.pdf
- https://www.andrew.cmu.edu/user/tjkelly/portfolio/Engineering_Deans_List_Tartan_Fall_2016.pdf
- https://elestoque.org/2014/02/09/news/find-out-who-are-the-purple-and-gold-award-winners/
- https://www.athletic.net/trackandfield/SchoolRecords.aspx?SchoolID=1086


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