Natanael Sebastian Simanjuntak

I'M WORKING ACROSS AI, NETWORK SECURITY AND FORENSICS, AND CLOUD-NATIVE INFRASTRUCTURE. I ALSO WORK ON DEEP LEARNING COMPUTER VISION FOR A HUMANOID ROBOT.

©NATANAEL
SEBASTIAN
SIMANJUNTAK
02 / SELECTED WORK

Selected Projects

Four projects across reinforcement learning, network security, cloud-native infrastructure, and simulation. Click any card to expand deep architectural details.

Tetris Deep RL Research neural network and environment benchmark
Research
Reinforcement learning
Tetris Deep RL Research
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Data Center Spine-Leaf network and DFIR forensic pipeline
Infra Lab
Network security and forensics
Data Center Microsegmentation & DFIR Lab
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Hardened Kubernetes Platform multi-layer security architecture
Cluster Lab
Cloud-native security
Hardened Kubernetes Platform
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WiFi Network Performance Simulator real-time WLAN canvas
Interactive
Network simulation
WiFi Network Performance Simulator
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Tetris Deep RL Research

Research

A controlled study of why Tetris agents learn from hand-crafted features and fail completely on the raw board.

03 / TRACK RECORD

Work Experience

Engineering roles where I build computer vision pipelines, perception models, and real-time robotic systems.

Gadjah Mada Robotics Team

Computer Vision Engineer

Nov 2025 — Present

Perception for a humanoid robot: finding the ball and reading the field from a live camera feed.

  • ›Ball detection: RF-DETR (Large), fine-tuned through Roboflow, reaches 97.7% mAP@50 with 97.1% precision and 97.0% recall on a held-out split of a 2,684-image multi-ball dataset. A YOLO detector was trained alongside it.
  • ›Field segmentation: YOLO segmentation trained on 10,233 annotated images across venues and lighting runs at about 12 FPS, and was benchmarked against RF-DETR Small.
PythonROS2RF-DETRYOLORoboflowOpenCV
EXPAND REPORT & PHOTO
04 / TECHNICAL CAPABILITIES

Technical Skills

A comprehensive overview of programming languages, deep learning frameworks, security tooling, and infrastructure technologies I work with.

Programming & ML

PythonLanguage
C++Language
PyTorchDeep learning
OpenCVVision library
YOLODetection model
RF-DETRDetection model
ROS2Robotics

Digital Forensics & Security

Cilium / eBPFNetwork policy
TetragonRuntime enforcement
KyvernoAdmission control
CosignImage signing
ZeekTraffic analysis
DFIRForensics
nftablesHost firewall
OPNsenseStateful firewall

Infra & Networking

LinuxOperating system
DockerContainers
KubernetesOrchestration
AnsibleAutomation
FRRoutingRouting
Argo CDGitOps