Projects through VulCode
I build websites, panels and platforms at VulCode: a contract, an invoice and a team that can take over when I am busy. The full scope with examples is on the services page.
Michał "DualFroz" Fox
Systems & Backend Developer
Software engineer, systems developer, and open-source enthusiast from Kraków. I engineer software end-to-end: from server provisioning and systems programming in Rust and Go, to responsive web applications and bots. Commercial projects executed via VulCode and Aphrodi.
Who I Am
Six perspectives on what drives me: code, design, gaming, chess, writing, and languages.
Code
I stepped into technology in 2020 - moving from simple static pages, to microservices in Rust and Go, to full-stack web platforms, bots, and desktop tooling. I don't believe in loyalty to a single language: the tool must fit the job.
How to work with me
Client work goes through VulCode, and everything else is public: code, behind the scenes and client reviews.
Find me elsewhere
Behind the scenes, sketches and whatever I am working on right now.
Code on git.vulcode.com
My own repositories and contributions to other open source projects. Whatever is public can be read line by line.
Join the community
The VulCode Discord server is the fastest way to reach me and the team: questions, announcements and support.
See what clients say
Reviews of the projects we built at VulCode.
Featured Projects
Real repositories, live platforms, and independent products.
VulCode
Software house and technology ecosystem focused on modern web engineering, custom systems, and resilient infrastructure.
TypeScript, Go, Rust, Next.js, Docker
Aphrodi
Creative agency and design studio blending crisp visual identity, abstract logos, and uncompromising UI/UX.
Branding, UI/UX, Design Systems, 3D
Flaem
Comprehensive game server hosting orchestration, VPS provisioning, bare-metal servers, and network automation.
Rust, Go, Mailcow, LXC, Proxmox
Plazer
Modern lightweight messenger emphasizing security, end-to-end encryption, privacy, and true server independence.
Rust (WebAssembly), Go, TypeScript (PWA), MLS (RFC 9420)
Core Stack & Metrics
The same numbers as on the About page, counted by my ghstats across every repository.
6 656 638
lines of code
click for a fun fact
What is left of 7 573 499 written: 200 906 769 characters, ~402 novels, ~26.9 km printed.
24 496
commits I authored
click for a fun fact
~366 changed lines per commit, ~14.5 commits per active day. Last 30 days: 3 803.
335
repositories, private ones too
click for a fun fact
All of git.vulcode.com, with copies of the open source projects I write for. 105 are my own, in 26 languages.
1 675
days with a commit
click for a fun fact
First lines of code in 2020, latest commit on 2026-10-25. 1 318 429 lines taken back out along the way.
From the blog
Short posts about what I built, what I learned and what went sideways.
Why this blog exists
I write here briefly and as things happen: what I built, what I learned, what went sideways. No search-engine tutorials and no lists of "things you must know". Most posts get written in the evening, when something is still stuck in my head after a day of code. Sometimes it is two sentences about a bug, sometimes a longer piece on why I picked one language for a project over another. If something here is outdated or just wrong, message me on Discord: dualfroz. I will fix it and credit whoever was right.
Read the post
Latest
- A jar of candy Since today there is a jar of candy on the home page, next to the header. You click it and draw a flavour with a short message from me. Every now and then a…
- From PNG to SVG, with a bit of geometry I got the Flaem logo as a PNG, but I needed a vector for the whole logo family: favicons, app icons, banners. Instead of tracing pixels, I measured the shape…
Frequently asked questions
In short: who I am, what I do and how to start working together.
Who is DualFroz?
DualFroz is my online alias. My name is Michał Fox and I am a software developer from Kraków, Poland. Under this name I publish my code, my projects, my open source contributions and this website. It is one person, not a company or an agency.
What do you do?
I build software end to end: from server setup and backends in Rust and Go, through web interfaces, to bots and automations. I do commercial software projects at VulCode, and design and branding at Aphrodi.
What services can I order from you?
At VulCode: websites, landing pages, dashboards and internal systems, SaaS platforms, online stores, mobile and desktop apps, and bots and automations.
At Aphrodi: visual identity, UI/UX design, print and merch, social media graphics, illustrations, video editing, 3D models and copywriting. Each service is described on the Services page.
What are VulCode and Aphrodi?
VulCode is a software house I founded. We build websites, apps, systems and bots there. Aphrodi is a design studio I co-run. It handles branding, interfaces and everything that needs to look good.
Can I hire you directly?
Yes. If you would rather work with me directly instead of through VulCode or Aphrodi, write to me through the form on the Contact page or by email at me@dualfroz.com.
Which technologies do you work with?
Mostly TypeScript, Rust, Go, PHP and C#, plus C and C++. I do not stick to one language, I pick the one that fits the project. My full stack and GitHub statistics are on the About page.
Do you contribute to open source?
Yes. I fix bugs in projects I use myself and send the fixes to their authors. My changes have landed in ILSpy, compromise, PHPMailer and Proxmox VE, among others. Current numbers are on the Open Source page.
How can I contact you?
The easiest way is the form on the Contact page or an email to me@dualfroz.com. On Discord I am dualfroz.
Is your question not here? Ask me on Discord
Let's Build Together
Have an application in mind, need a solid Discord bot, a new website, or infrastructure tuning?
Reach out directly or message me on Discord. I'll provide straightforward engineering solutions without corporate layers.
