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© 2026 Yehezkiel Wiradhika

Hey, i'm Hez.

Welcome to my website!

I'm a Penetration Tester and DevSecOps / Security Engineer combining Cyber Security with Machine Learning. I understand vulnerabilities from both sides: as an attacker who has tested 20+ web applications for critical flaws, and as an engineer who built the systems being attacked. My thesis applied ML to web honeypot attack data, and I've built custom security tools — Vortex, AegisCI, GateKeeper Go, RBACLens. Pursuing eJPT, with OSCP next.

Posts and Projects ↓More About
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Featured Posts

Cyber Security deep-dives, DevSecOps, Security Engineering distributed systems, and Machine Learning — written from the trenches.

9/7/2026

Ubuntu 22.04 VPS Linux Server Hardening from Scratch

Accepting file uploads is one of the easiest ways to introduce a critical vulnerability into your application. Here's how to do it right.

ubuntuvpscyber security
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8/31/2026

10 Secure Go Coding Practices

10 of the most important Go Coding Practices.

golangappsecbackend
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Featured Projects

Production and portfolio projects across Penetration Testing, DevOps, Security Engineering and AI/ML — including real-world systems shipped at Astra Otoparts.

⭐ Production Grade Projects
Production Systems

⭐ Production Grade Projects

Production-grade distributed systems, industrial AI pipelines, threat intelligence platforms, and high-concurrency microservices shipped across enterprise, freelance, and research domains.

GoDistributed SystemsMicroservicesNext.jsPyTorch
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Cyber Security: Penetration Testing & DevSecOps
Security & Pentest

Cyber Security: Penetration Testing & DevSecOps

Offensive security engagements, threat intelligence pipelines, SIEM/IDS implementations, honeypots, malware analysis, and automated DevSecOps static/dynamic scanning.

Cyber SecurityPenetration TestingDevSecOpsThreat IntelligenceSIEM
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DevOps, Cloud Computing & Networking Projects
DevOps & Cloud Lab

DevOps, Cloud Computing & Networking Projects

A bunch of DevOps, Cloud Computing, Networking & Operating Systems projects.

DockerTerraformAWSEC2S3
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MISC: Machine Learning, Computer Vision & AI Projects
Machine Learning & AI

MISC: Machine Learning, Computer Vision & AI Projects

Production and research projects spanning Computer Vision, MLOps, RAG/LLMs, Customer Segmentation, and Threat Intelligence.

Computer VisionYOLOMLOpsRAGLLM
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