RAZORBILLKen Sakura · Engineer
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Ken Sakura / Razorbill

Software Engineera.k.a. Razorbill

Hello, I’m Ken Sakura — a software developer and cybersecurity enthusiast, engineering secure software across the whole IT stack.

@razorbill: ~
FieldFull-stack
FocusSoftware · Security · Systems
Based inJapan — JST
LanguagesEnglish · 日本語
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PythonC++RustJavaScriptFastAPIDjangoPyTorchTensorFlowLinuxKaliDockerNginxPostgreSQLGitHubFigmaVS CodeOpenAIRaspberry PiPythonC++RustJavaScriptFastAPIDjangoPyTorchTensorFlowLinuxKaliDockerNginxPostgreSQLGitHubFigmaVS CodeOpenAIRaspberry Pi
[ 01 ] Software Developer Insight

I write code like an engineer, not a coder — the right method chosen for every job. Performance, maintainability, security: no emotion, no theory. Just logic, written to last.

[ 02 ] Fields

Fluent across the entire field.

Understanding the whole stack means I see the best way to build the app. Not just the code.

~/fields/software01 / 06

Software Engineering

Full-stack systems in Python with handwritten front-ends — from APIs and databases to the interface itself. Built to be fast, readable and maintainable for years.

  • APIs & back-ends
  • Desktop apps
  • Web front-ends
PythonFastAPIDjangoFlaskJavaScriptHTML5CSS3PostgreSQL

Cyber Security

An attacker’s mindset, applied before a single line ships. I study exploits, harden systems and build encryption into the foundations.

  • Secure coding
  • Encryption
  • System hardening
Kali LinuxOWASPWiresharkGnuPGHack The BoxTryHackMeTorOpenSSL

Systems & Infrastructure

Linux servers, networks and cloud deployments that stay up — automated with shell scripts, containerised and monitored.

  • Linux servers
  • Networking
  • Cloud & containers
LinuxUbuntuDebianNginxDockerBashAWSCloudflare

Artificial Intelligence

From classical machine learning to LLMs. I’ve followed the field since the Transformer in 2017, and choose models to solve real problems.

  • Machine learning
  • Computer vision
  • LLM integration
PyTorchTensorFlowKerasscikit-learnHugging FaceOpenCVOpenAIOllama

Interface Design

Clarity first, every pixel justified. Interfaces with hierarchy, rhythm and restraint — designed in Figma, built by hand.

  • UI/UX
  • Prototyping
  • Front-end craft
FigmaHTML5CSS3JavaScript

Hardware

I understand the machine my code runs on — from building PCs to programming microcontrollers.

  • PC building
  • Microcontrollers
  • Performance tuning
Raspberry PiArduinoIntelAMDNVIDIA
[ ready when you are ]

Have a system that needs building — or breaking?