- Joined
- Sep 2025
- How they joined
- Directly
- Before Cognition
- Jane StreetSoftware Engineer
- Status
- Current
Overlapped before Cognition
Details
LocationNew York, New York, United States
Company sitecognition.ai
LanguagesEnglish, Korean, Spanish
UniversityCarnegie Mellon University
PythonJavaApplied MathematicsMicrosoft OfficeCustomer ServiceMicrosoft ExcelManagementMicrosoft WordPowerPointResearchLeadershipStrategic PlanningPublic SpeakingC++
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.Oct 19, 2026
- 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".Feb 24, 2026
- Software Engineer at Cognition in New York since September 2025, building on Devin, Cognition's autonomous AI software engineer.Sep 2025
- Current role is Software Engineer at Cognition.
- 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.Feb 24, 2026
- Software Engineer at Nuro, the autonomous delivery vehicle company, from Jan 2019 to Jul 2020, the first full-time job after CMU.Jan 2019
- 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.Oct 19, 2026
- 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.Oct 19, 2026
- 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.May 2019
- Interned on the Query Processing Team at MemSQL (now SingleStore) in summer 2018, San Francisco Bay Area.Jun 2018
- 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.May 2017
- 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).Jan 2016
Previous roleJane Street
Experience
Software Engineer at Cognition
Sep 2025 - Present
New York, New York, United States
Software Engineer at Jane Street
Aug 2020 - Aug 2025
Software Engineer at Nuro
Jan 2019 - Jul 2020
Software Engineering Intern at MemSQL
Jun 2018 - Aug 2018
San Francisco Bay Area
Query Processing Team
Software Engineering Intern at Pure Storage
May 2017 - Aug 2017
Mountain View, CA
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
Jan 2016 - May 2017
Greater Pittsburgh Area
15-112 Fundamentals of Programming (Spring 2016, Fall 2016) 15-251 Great Theoretical Ideas in Computer Science (Spring 2017, Spring 2018)
Education
Carnegie Mellon University
Jan 2015 - Jan 2018
Bachelor of Science (B.S.), Computer Science
Carnegie Mellon University
Jan 2015 - Dec 2018
Bachelor of Science (B.S.), Computer Science
Projects
AchievementsTA for CMU 15-112 and 15-251
AwardsStanford Math Tournament 2014 Calculus test, tied 9th · CMU Dean's List (Fall 2016)
Profiles
