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# Sungchan Yi

- Last updated: 2025-11-20
- Email: [calofmijuck at snu dot ac dot kr](mailto:calofmijuck@snu.ac.kr)

**Research Interests**: computer architecture, hardware-software co-design, cryptography, formal verification

## Education

**Seoul National University** (Sept. 2024 ~ Present)

- M.S. Candidate in Computer Science and Engineering at [Architecture and Code Optimization Lab](https://arc.snu.ac.kr)
- **Advisor**: Professor Jae W. Lee
- GPA: 4.18/4.3

**Seoul National University** (Mar. 2017 ~ Feb. 2024)

- B.S. in Computer Science and Engineering, Minor in Mathematical Sciences
- GPA: 3.96/4.3 (Summa Cum Laude)

## Research Experience

[**Architecture and Code Optimization Lab**](https://arc.snu.ac.kr), *M.S. Candidate* (Mar. 2024 ~ Present)

- Leading **Software Defined Manycores** project

[**Cryptography & Privacy Lab**](https://crypto.snu.ac.kr), *Undergraduate Research Assistant* (Jan. 2024 ~ Feb. 2024)

- Implemented generalized BFV scheme with bootstrapping based on CKKS bootstrapping techniques
- Analyzed automorphism group of the plaintext space and determined their effects on ciphertext

[**Software Foundations Lab**](https://sf.snu.ac.kr), *Undergraduate Research Assistant* (Jul. 2023 ~ Oct. 2023)

- Implemented stack variable merging optimization that reduces memory allocation calls and tried to prove its correctness with Rocq theorem prover

[**Architecture and Code Optimization Lab**](https://arc.snu.ac.kr), *Undergraduate Research Assistant* (Jan. 2023 ~ Mar. 2023)

- Implemented a parametrized experiment framework to automate training and evaluation of various CNN models with different activation functions and their knowledge distillation based ReLUifications
- Quantified benefits of ReLUification on sparsity-aware NPU for Samsung mobile SoC in terms of memory footprint and computation reduction

## Work Experience

[**Scatterlab**](https://scatterlab.co.kr), *Software Reliability / Security Engineer* (Nov. 2020 ~ Sept. 2022)

- Spring Boot (Java) Backend, Docker/Kubernetes, AWS Cloud Security and Operations
- Led cloud security project, co-worked with AWS to completely rebuild and secure the cloud infrastructure
- Led software reliability team, cut server operation costs with spot instances and container orchestration

[**Logpresso**](https://logpresso.com/en), *Big Data Platform Engineer* (Jul. 2019 ~ Oct. 2020)

- Implemented loggers, parsers, and query commands that collect and analyze data from various sources, applied software-level optimizations to improve performance
- Optimized distributed security operation system from pull to push architecture to reduce latency

## Publications

- **Sungchan Yi**, Keun Soo Lim, Hoyeon Jo, Sungjun Jung, Minwoo Kwak, Dongoh Kim, Luigi Cussigh, Seong Hoon Seo, Jinkyu Jeong, Jae W. Lee, "Software-Defined Manycores via Hardware-Managed Preemptive Coroutine Scheduling", _International Symposium on Computer Architecture (ISCA)_, 2026. (Under Review)
- **[ACCV'24]** Soosung Kim, Yeonhong Park, Hyunseung Lee, **Sungchan Yi**, and Jae W. Lee, "ReLUifying Smooth Functions: Low-Cost Knowledge Distillation to Obtain High-Performance ReLU Networks", _Asian Conference on Computer Vision (ACCV)_, Hanoi, Vietnam, December 2024. ([PDF](https://arc.snu.ac.kr/pubs/ACCV24_ReLU.pdf))
- **Sungchan Yi**, "Secure IAM on AWS with Multi-Account Strategy", _Undergraduate Thesis_, December 2023. **Outstanding Undergraduate Thesis Award.** ([PDF](https://arxiv.org/pdf/2501.02203))

## Honors & Awards

**Outstanding Undergraduate Thesis Award**

- Title: Secure IAM on AWS using Multi-Account Strategy

**Top Prize in Hacking and Defense Contest 2021**

- Awarded by Korea Internet & Security Agency (KISA)
- Topic: Design and Operation of Secure Cloud Architectures

**Kwanjeong Educational Foundation Scholarship**

- Full tuition and fees for 2 years of undergraduate studies

## Extracurricular Activities

**Web Administrator of Architecture and Code Optimization Lab**

- Responsible for maintaining the web infrastructure: website, cloud, accounts, wiki, etc.
- Installation of convenient tools such as shared password manager and schedule notification system

**Seoul National University College of Engineering Honor Society** (Mar. 2022 ~ Aug. 2023)

- SNU Tomorrow’s Edge Membership (STEM)
- **Web Administrator**: reduced cloud infrastructure costs by 50% and installed shared storage

**Guardian**, Seoul National University Security Club (2018 ~ Present)

- Former president of the club in 2019
- Taught basic Linux, x86 assembly, and C programming to new members
- Created 30 linux/x86 assembly wargame challenges for members to practice

## Technical Skills & Interests

- **Programming Languages**: C/C++, Java, Python, Golang, Coq
- **Architectural Simulators**: gem5
- **DevOps**: Docker, Kubernetes, AWS
- System/cloud security, cryptography
- Compilers and formal verification
- Mathematics in general, especially algebra and analysis

## Language Proficiency

Fluent in **English** and native in **Korean**

- **IBT TOEFL**: 113 (Reading: 30, Listening: 30, Speaking: 26, Writing: 27)