Education

MSc in Computer Science

Saarland University (UdS), Saarbrücken

Oct 2025 - Sep 2027 (Expected)

BSc in Computer Science

Gadjah Mada University (UGM), Yogyakarta

Aug 2018 - June 2022

Thesis : SP-BatikGAN: An Efficient GAN for Symmetric Pattern Generation

Advisor : Wahyono Ph.D. Stabilize GAN for limited data symmetric pattern generation tasks. With the use of generalized symmetry loss in generator training led to an 18% decrease in model FID, while efficient attention increased model diversity recall by 334%.

Work Experiences

Software Engineer

Cloud Infra P, MX Mobile Experience, Samsung Electronics

Jan 2023 - Jul 2025

Entrusted to stabilize messaging application services. Diagnosed and resolved critical production issues, improve service availability and up-time; Implemented Zero Downtime Deployment; Enhanced batched message broadcasting, reducing benchmark time by over 90%. Improve overall communication between global R&D centers.Oversaw auto-versioning, image promotion among clusters, and cloud database migration. Developed load test tools for robustness, scalability, recoverability, and maintainability.

AI Engineer

Cloud Infra P, MX Mobile Experience, Samsung Electronics

Dec 2022 - Dec 2023

Developed Distributed Query Engine with Learned Structured Index for machine learning databases and applied Reinforcement Learning for Horizontal Partitioning, Caching, and Indexing. Create Large Language Models Training using Low Rank Adaptation and model quantization for mobile use. Worked on audio/video streaming services to implemented, gRPC client LookAside, efficient audio/video stream routing algorithm for auto-scalable HPA, Cloud Native Selective Forwarding Units (SFU) for WebRTC.

AI Engineer Intern

Max Planck Institute Tübingen, Max Planck Society, Tübingen

July 2022 - Sep 2022

Joined RoLi Lab. Investigate pipeline robustness and self-supervised learning (SwAV, SimCLR, and BYOL). Experiment with latent bootstrapping and unsupervised clustering of zebrafish locomotion. As well write a custom neural network model of the primary visual cortex on PyTorch, and run the model natively on the website using ONNX. See chrysophyt.github.io/v1sh.

Computer Vision Research Assistant

Department of Computer Science and Electronics, UGM, Yogyakarta

April 2021 - Oct 2021

Joined Wahyono Ph.D. research group, assist Intelligent Surveillance Fire Detection research by gathering relevant video data, labeling and manually annotating the video. Automate ground truth generation and maintain the repository. Design a program UI prototype and write an original draft for the dataset paper.

Machine Learning Summer Program

Grow with Google : Bangkit Academy

Feb 2021 - July 2021

  • Graduate with Distinction, Top 10% nationwide by project ideation, pace, and grades (98/100).

Publications

Oetomo, Chrystian, & Garibaldy Watulingas. System and method for evolving index on federated query engine using virtual partition. WO2025037192A1, 2025. https://patents.google.com/patent/WO2025037192A1/

Wahyono, Andi Dharmawan, Agus Harjoko, Chrystian, & Faisal Dharma Adhinata. Region-based Annotation Data of Fire Images for Intelligent Surveillance System. Data in Brief, Volume 41, 2022. https://doi.org/10.1016/j.dib.2022.107925

Chrystian, A. Subiantoro, & A. P. Arianto. “COVID-19 detection on Chest X-Ray Dataset with Capsule Neural Network” (translated, original in Indonesian), Prosiding SINAPTIKA ke-12, p. 26, 2020, ISSN: 2086-8251.

Chrystian, Wahyono. SP-BatikGAN : An Efficient GAN for Symmetric Pattern Generation, arXiv:2304.09384, 2023.

Teaching

Teaching Assistant - Two Machine Learning Class [KOM & ELS MII-2402]

Department of Computer Science and Electronics, UGM

Aug 2021 - Dec 2021

Teaching & Lab Assistant - Programming Class [MII-1201 & MII-1202]

Faculty of Mathematics and Natural Science, UGM

Aug 2019 - Dec 2020

Awards

  • 2025 Full 2-Years Scholarships for STEM disciplines awardee, DAAD
  • 2024 Employee of the Quarter, Cloud Infrastructure, Samsung Research ID
  • 2022 Full 4-Years Sea Scholarship Indonesia Awardee, Sea Group Limited (Shopee, Garena, ...) SG
  • 2022 Hanrieder Foundation for Excellence, Max Planck Foundation, Max Planck Society
  • 2021 Graduate with Distinction, Top 10% Startup Ideation Projects, Grow with Google ID
  • 2020 Best Paper & Best Main Presenter, SINAPTIKA 2020, National-Level Workshop
  • 2020 Undergraduate Research of The Year, Faculty of Mathematics and Natural Sciences, UGM
  • 2020 1st Place Data Mining Competition, Codig 3.0, Mercu Buana University
  • 2020 Data Mining National Finalist, GEMASTIK XIII, Ministry of Higher Education Indonesia

Extracurricular Activities

Sustainable Growth through Agro and Eco-Tourism Initiatives in Villages and Farms

Student Community Service, Yogyakarta

Dec 2021 - Feb 2022

Student Research Member at Intelligent System Lab

Department of Computer Science and Electronics, UGM

Aug 2021 - June 2022

Head of Gadjah Mada Game and Media Lab

IT Community at Gadjah Mada University

Aug 2019 - June 2020

Computing Skills & Hobbies

  • Game Development with Unity, 3D Modeling, Story Writing, Digital Painting.
  • Cloud Computing with Docker, Kubernetes, Terraform, Redis, Nginx, dotnet, Actor model.
  • AI Development with custom PyTorch models, TensorFlow, ONNX,
  • Web Development with NodeJS, React, JQuery
  • Experienced working with Go, C++, C#, Java, Python, JS, MatLab, Rust.
  • Experienced working with Docker, Kubernetes, AWS, ArgoCD, Github Actions, Redis Cluster.
Language Skills  
English Fluent, IELTS 7.5
DE, KR Elementary

Certification

(Due to covid-19 everything seems to be online now)