Michał "DualFroz" Fox

Software developer building games and IT ecosystems, based in Kraków

Founder @ VulCode

Co-founder @ Aphrodi

Co-founder & Developer @ Lunatic Studios

Lead Developer @ Flaem, Plazer, Gyred

dualfroz.com

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_{Polski · English}

Hi, I'm Michał. I'm 18 and I'm from Kraków. I've been building all kinds of software projects regularly since 2020. For most of that time I focused on backend logic, but lately I've been shifting more towards design and UI/UX, fields that are far more resistant to the impact of LLMs. I believe creativity and ideas are two things that will stay untouched forever.

I contribute to all kinds of open source projects often and actively. I like helping and supporting communities wherever I can. I know my work isn't always perfect, so I always review it carefully, making sure that only the highest-quality additions and fixes land in projects used by thousands or even millions of people.

I have over 6 years of programming experience. In that time I've written over 5,000,000 lines of code across 200+ projects. Altogether I've contributed to 74 open source repositories with a combined 610,000+ stars on GitHub.

Outside of programming I'm interested in a lot of things: art, history, linguistics, mathematics, chess, music... the list goes on.

Now: I've recently been working on finishing the first version of Flaem, a hosting panel. The project is written in several languages (TypeScript, Rust, Elixir, Golang, plus microservices in Java, Python and C) and adds up to almost a million lines of code. I'm planning the first release of Flaem for around October/November 2026.

📫 Contact

🌐 Website: dualfroz.com ✉️ Email: me@dualfroz.com 💼 LinkedIn: linkedin.com/in/dualfroz 🐦 X: x.com/dualfroz 📸 Instagram: instagram.com/dualfroz 💬 Discord: DualFroz 🏢 Company: vulcode.com

📖 Story

🌱 Beginnings 2020	My first lines of code. Simple static websites, each one teaching me something more interesting than the last. Nothing advanced yet, but everyone starts somewhere.
🎮 Servers and community SCP: Secret Laboratory	I ran SCP:SL servers and wrote add-ons for them in C#. That work grew into Nebula: a set of plugins with a moderation tool and server statistics aggregation.
🛠️ Support and marketing MatHost	Technical support across hundreds of tickets: game servers, Discord bots, Pterodactyl. This is where I really grew, and it shows. Between 2023 and 2025 I gained a huge amount of knowledge precisely by helping MatHost's customers.
💼 Client projects since 2024	Serious freelance work: projects from start to finish, with a focus on system design, architecture and how everything works from the ground up. This is where I learned many of the things I use every day now.
🏢 My own software house VulCode	I founded VulCode. Quoting the website: "VulCode is a Polish software house with years of experience. Since 2020 it has been delivering high-quality software and has written over 3 million lines of code. It specializes in websites, panels, dashboards and applications, as well as building scalable platforms. It actively contributes to dozens of open source projects."
🎨 Branding and marketing Aphrodi	I co-run Aphrodi, a branding, digital and marketing studio that complements what VulCode builds in code. I regularly work on marketing and graphic design there, which rounds out my stack a little more every day.
🌍 Open source today	I contribute to open source projects used by millions of people, from developer tools to libraries. As I said above, I simply like helping others. It gives me a lot of joy.
🚀 My own platforms today	I build my own products: Flaem, Plazer, Gyred and the SaaS products Atrium and Lokal. There will be more over time, but for now I'm focused on polishing the existing projects rather than starting new ones.

🏢 Companies and roles

	VulCode  founder VulCode is a Polish software house with years of experience. Since 2020 it has been delivering high-quality software and has written over 3 million lines of code. It specializes in websites, panels, dashboards and applications, as well as building scalable platforms. It actively contributes to dozens of open source projects.
	Aphrodi  co-founder A creative agency: branding, visual identity, web design, 3D graphics and video.
	Lunatic Studios  co-founder An independent game studio: online chess with custom rules and a collection of mini games.

⭐ Main projects

	Flaem   A hosting and infrastructure platform: game servers and containers, VPS and LXC, network services (tunnels, transit, IP blocks, integrations with routers and anti-DDoS protection) and IPMI. Seven independent modules in Rust, Elixir and Go, a React panel, and apps for desktop, iOS and Android.
	Plazer   An end-to-end encrypted messenger: private, lightweight, highly customizable and self-hostable by anyone. Built around privacy, a small footprint and customization. Something I want to use myself.
	Gyred   A panel for complex, long-running autonomous AI agent sessions, with an assistant that keeps long-term context in indexed text files. A useful tool for developers when used well.

Smaller projects, with descriptions

• Vulp: a Rust terminal app for managing an entire workspace of repositories (repo state, sync, projects, pull requests, statistics)
• Atrium: a hotel panel with a live floor and room plan, reservations, housekeeping and room service
• Lokal: a panel for restaurants, bars and cafés with reservations on a floor plan, orders and staff scheduling
• VulBio: personal landing pages assembled from a panel, without touching code
• Nebula: plugins for SCP: Secret Laboratory, including server moderation and analytics
• Pharos: uptime monitoring with a public status page and incidents, a single Go binary
• Frostbyte: a hobby x86_64 operating system kernel in C and assembly
• Cobalt: an embedded key-value store built on an LSM tree, written in Zig
• Gambit: an alpha-beta chess engine in Scala 3
• Lumen: a dynamically typed scripting language in Kotlin
• Voxelforge: a voxel engine in C++17 with a playable in-browser demo
• Cellar: a spreadsheet engine with a formula language, in Dart
• Prism: a Ruby web framework with no external dependencies
• Bazaar: an online store on a custom PHP microframework with Stripe
• Chip8Sharp and GameBoySharp: CHIP-8 and Game Boy emulators in C#

🧰 What I do day to day

Besides the main projects I do a lot of smaller things, both for clients and for myself:

	Area	Examples
🌐	Websites, panels and apps for clients	company websites with a CMS, client panels, dashboards, online stores, integrations and automations
☁️	SaaS platforms	I'm building platforms for the hosting, hotel and restaurant industries, and in the future I'd like to expand into more industries.
🖥️	Hosting and infrastructure	game servers, Pterodactyl, Docker, monitoring, my own stats API ghapi, and above all Flaem.
⚙️	Systems and low-level	a hobby x86_64 kernel in C and assembly, a key-value database engine (LSM) in Zig, Game Boy and CHIP-8 emulators in C#. In short, I build all sorts of things just to learn how they work.
🧪	Languages and engines	a scripting language in Kotlin, a chess engine in Scala, a voxel engine in C++ with a WebAssembly demo, a spreadsheet engine in Dart.
🎮	Games and plugins	plugins for SCP: Secret Laboratory (Nebula), browser mini games and more.
🤖	Bots and tools	Discord bots, the Vulp terminal app for managing repositories, CLI tools, tools for AI agents.
📱	Desktop and mobile	apps for Windows, macOS, iOS and Android in Swift, Kotlin and C#

📊 In numbers

5,994,022 lines of code		23,830 commits	200+ projects
610,000+ OSS project stars	74 open source projects	26 languages	1,655 working days

+ 5,994,022 lines added
- 778,721 lines removed
! 5,215,301 net lines

Languages

	Language	Lines of code	Commits	Share
	TypeScript	2,274,503	6,203	46.0% ██████████
	Rust	988,753	2,516	20.0% ████
	Go	281,782	907	5.7% █
	Kotlin	206,250	796	4.2% █
	C#	162,872	752	3.3% █
	JavaScript	140,024	500	2.8% █
	PHP	130,914	149	2.6% █
	Swift	116,812	437	2.4% █
	Elixir	91,810	438	1.9% █
	Python	84,375	317	1.7% █
	HTML	80,555	145	1.6% █
	CSS	61,717	502	1.2% █
	C++	57,275	358	1.2% █
	C	49,346	355	1.0% █
	Zig	44,583	284	0.9% █
	SQL	38,114	590	0.8% █
	Ruby	37,655	263	0.8% █
	Lua	32,053	206	0.6% █
	Shell	29,411	263	0.6% █
	Java	13,788	75	0.3% █
	Dart	6,013	40	0.1% █
	Solidity	4,688	33	0.1% █
	Haskell	3,609	28	0.1% █
	Scala	3,133	29	0.1% █
	F#	3,017	18	0.1% █
	Assembly	397	6	0.0% █

Frameworks and tools detected in my projects _{(number of repositories)}

Docker ₆₁ · React ₃₀ · Express ₂₇ · Vite ₂₅ · Tailwind CSS ₂₄ · Motion ₁₈ · Prisma ₁₆ · discord.js ₁₄ · Serde ₁₀ · Tokio ₇ · reqwest ₇ · Gorilla WebSocket ₆ · SQLite ₆ · xUnit ₆ · Stripe ₅ · Avalonia ₄ · Axum ₄ · JUnit ₄ · PHPUnit ₄ · Playwright ₄ · SQLx ₄ · Framer Motion ₃ · Jetpack Compose ₃ · Redis ₃ · Vitest ₃ · clap ₃ · gRPC ₃ · wasm-bindgen ₃ · Android ₂ · BullMQ ₂ · Chart.js ₂ · Coroutines ₂ · Guzzle ₂ · Jest ₂ · Laravel ₂ · Next.js ₂ · Pterodactyl ₂ · Zod ₂ · aiohttp ₂ · discord.py ₂ · i18next ₂ · webpack ₂ · Cobra ₁ · Discord.Net ₁ · Docker SDK ₁ · Ecto ₁ · Electron ₁ · Expo ₁ · FastAPI ₁ · GORM ₁ · Gin ₁ · HTTPX ₁ · Json.NET ₁ · Paper ₁ · PostgreSQL ₁ · Preact ₁ · Ratatui ₁ · React Native ₁ · Spring Boot ₁ · Tauri ₁ · chi ₁ · discordgo ₁ · gopher-lua ₁ · pytest ₁ · tonic ₁

_{Counted by my own API ghapi.dualfroz.com across all repositories, private ones included. Updated every 24 hours.}

🌍 Open source

Below is a list of projects I've contributed to (only those with accepted changes), sorted by star count. 610,000+ ⭐ in total across 74 repositories. The “Commits” column links to a repository with my commits (author, date and diff).

Project	Stars	Language	Changes	Commits
mozilla/firefox	–	JavaScript	+293 -14	4
proxmox/proxmox-widget-toolkit	–	Perl	+59 -31	6
proxmox/pve-manager	–	Perl	+497 -72	31
proxmox/pve-storage	–	Perl	+1050 -13	8
proxmox/qemu-server	–	Perl	+438 -34	12
zed-industries/zed	⭐ 91.8k	Rust	+123 -10	11
telegramdesktop/tdesktop	⭐ 33.3k	C++	+24 -5	3
composer/composer	⭐ 29.5k	PHP	+142 -4	3
icsharpcode/ILSpy	⭐ 26.7k	C#	+4624 -13	16
urfave/cli	⭐ 24.3k	Go	+123 -12	3
PHPMailer/PHPMailer	⭐ 22.3k	PHP	+135 -4	6
postcss/autoprefixer	⭐ 22.2k	JavaScript	+50 -4	5
gleam-lang/gleam	⭐ 22k	Rust	+134 -1	2
twpayne/chezmoi	⭐ 21.9k	Go	+43 -17	2
Seldaek/monolog	⭐ 21.4k	PHP	+41 -2	2
valeriansaliou/sonic	⭐ 21.4k	Rust	+88 -20	6
OpenRA/OpenRA	⭐ 17.6k	C#	+56 -5	2
briannesbitt/Carbon	⭐ 16.6k	PHP	+87 -0	3
PuerkitoBio/goquery	⭐ 15k	Go	+183 -18	4
App-vNext/Polly	⭐ 14.2k	C#	+19 -1	1
hajimehoshi/ebiten	⭐ 13.6k	Go	+19 -13	8
filp/whoops	⭐ 13.2k	PHP	+115 -3	4
spencermountain/compromise	⭐ 12.2k	JavaScript	+124 -11	38
doctrine/lexer	⭐ 11.1k	PHP	+72 -2	2
kanboard/kanboard	⭐ 9.9k	PHP	+127 -7	7
FluentValidation/FluentValidation	⭐ 9.8k	C#	+14 -1	2
serilog/serilog	⭐ 8.1k	C#	+12 -0	2
concourse/concourse	⭐ 7.9k	Go	+154 -24	1
predis/predis	⭐ 7.8k	PHP	+410 -28	5
vscode-neovim/vscode-neovim	⭐ 7.8k	TypeScript	+65 -2	6
NLog/NLog	⭐ 6.5k	C#	+19 -0	15
maildev/maildev	⭐ 6.1k	TypeScript	+69 -13	8
Pagefind/pagefind	⭐ 5.5k	Rust	+48 -2	10
xoofx/markdig	⭐ 5.3k	C#	+223 -7	8
dromara/carbon	⭐ 5.2k	Go	+41 -4	1
alecthomas/chroma	⭐ 5.1k	Go	+90 -3	1
olekukonko/tablewriter	⭐ 4.8k	Go	+16 -0	1
knadh/koanf	⭐ 4.2k	Go	+135 -10	2
spencermountain/spacetime	⭐ 4.1k	JavaScript	+15 -40	7
itchyny/gojq	⭐ 3.8k	Go	+42 -5	9
Suor/funcy	⭐ 3.5k	Python	+18 -2	2
thephpleague/csv	⭐ 3.5k	PHP	+22 -9	2
composer/satis	⭐ 3.3k	PHP	+55 -10	5
montanaflynn/stats	⭐ 3k	Go	+66 -23	3
versity/versitygw	⭐ 3k	Go	+124 -14	24
thephpleague/commonmark	⭐ 3k	PHP	+17 -0	2
mitsuhiko/insta	⭐ 3k	Rust	+8 -2	1
BurntSushi/jiff	⭐ 3k	Rust	+37 -5	1
zzzprojects/html-agility-pack	⭐ 2.9k	C#	+158 -2	2
Paymenter/Paymenter	⭐ 2.7k	PHP	+135 -11	4
api-platform/core	⭐ 2.6k	PHP	+52 -27	2
pelican/panel	⭐ 2.4k	PHP	+64 -3	3
gookit/goutil	⭐ 2.4k	Go	+12 -0	4
dedoc/scramble	⭐ 2.2k	PHP	+23 -0	2
gocarina/gocsv	⭐ 2.2k	Go	+89 -2	5
thephpleague/html-to-markdown	⭐ 1.9k	PHP	+3 -2	6
AfterShip/email-verifier	⭐ 1.6k	Go	+99 -3	3
fabiocaccamo/python-benedict	⭐ 1.6k	Python	+66 -5	2
gookit/color	⭐ 1.6k	Go	+12 -1	3
olebedev/when	⭐ 1.5k	Go	+45 -1	4
dgilland/pydash	⭐ 1.4k	Python	+18 -5	4
cakephp/chronos	⭐ 1.4k	PHP	+17 -2	2
go-playground/form	⭐ 931	Go	+35 -0	2
mkideal/cli	⭐ 723	Go	+22 -1	2
gookit/config	⭐ 585	Go	+29 -8	2
rust-syndication/rss	⭐ 502	Rust	+24 -2	2
kelindar/bitmap	⭐ 385	Assembly	+146 -12	5
brick/date-time	⭐ 361	PHP	+67 -36	3
pydantic/pydantic-extra-types	⭐ 338	Python	+124 -1	2
rodaine/table	⭐ 324	Go	+32 -2	2
wroberts/pytimeparse	⭐ 299	Python	+5 -1	3
QEDK/configparser-rs	⭐ 88	Rust	+22 -1	3
thephpleague/uri-src	⭐ 51	PHP	+18 -2	4
spiral/testing	⭐ 7	PHP	+255 -6	5

🛠️ Technologies

Programming languages

TypeScript	Rust	JavaScript	Go	PHP	C#	Python
Kotlin	Elixir	Swift	C++	Java	C	Dart
Solidity	Ruby	Lua	Zig	Haskell	Scala	F#
Assembly

Backend and DevOps

Node.js	ASP.NET Core	Laravel	Symfony	Django	Flask	FastAPI
Docker	Kubernetes	nginx	Grafana	Linux	Git

Databases

PostgreSQL	MySQL	MariaDB	SQLite	Redis	MongoDB	ClickHouse
Cassandra	Prisma	JSON

Frontend and apps

React	Next.js	Vue	Angular	Astro	Vite	Tailwind CSS
Bootstrap	HTML	CSS	Sass	Electron	Tauri	Avalonia

Software

VS Code	Visual Studio	JetBrains IDEs	Android Studio	Xcode	Unity	Godot
Unreal Engine	Figma	Photoshop	DaVinci Resolve	Blender

_{Details on how I use each technology: dualfroz.com/en/stack}

♟️ Beyond code

In short: I love... thinking. I enjoy solving nonograms and sudoku with complex rules, and I play chess for at least an hour a day. I regularly go past 2000+ elo on chess.com, but unfortunately my account keeps getting banned by chess.com (false-positive cheating flags). Soon I'll be going for a FIDE title (CM), which should clear me of the ridiculous accusations from chess.com's incompetent staff. I'm also going to apply to Mensa.

🤝 Working together

Topic	Where
Commercial work: website, panel, app, platform	vulcode.com
Branding, design, graphics and video	aphrodi.pl
Open source, a chat, recruitment, anything else	me@dualfroz.com (or socials!)