fassi.dev

Software Developer

Lucas Fassi.
Turning ideas into things people actually use.

I'm Lucas — a developer from Brazil building web, mobile and automation projects. Currently shipping software at 89FM and creating my own tools along the way.

01Featured projects

See all projects
2026Shipped

Mamão

Downloading videos from your favorite social apps was never this easy. Share, choose, done.

KotlinAndroidyt-dlp
2026Open source · v0.1.0

Fassi Skills

A personal registry of AI agent skills and a single command that installs the right ones into any project. Works with Claude Code, Cursor, Codex, Copilot and Windsurf.

Agent SkillsClaude CodeMarkdownJSON
2026Under development

Squint MCP

An MCP server that cross-references what the browser reports (DOM/CSS) with what is actually rendered (pixels) to find visual issues, without needing baselines.

Python 3.12MCP SDK (FastMCP)PlaywrightChromium headless
2026Open source · v0.1.0

Squad Code MCP

Run Claude Code sessions as a squad of mother, leader, workers and judge over a shared MCP broker, with a terminal UI to watch them work and answer their questions.

MCPClaude CodeBunTypeScript

02Tools I work with

Frontend

  • Next.jsProduction apps, websites and experiments
  • TypeScriptJavaScript with fewer surprises
  • Tailwind CSSFast styling with consistent design
  • HTML / CSSThe foundation of the web

Backend

  • Node.jsAPIs, integrations and backend services
  • DjangoAutomation, scripts and solving boring problems
  • Spring BootStructured backend applications with Java
  • PostgreSQLReliable data storage and complex queries
  • RedisFast caching and temporary data
  • APIsMaking systems talk to each other

Mobile

  • Kotlin MPNative Android and iOS development
  • React NativeCross-platform mobile development

Systems / Low-Level

  • LinuxDevelopment environments and servers
  • WindowsMy default work OS
  • MacOSWhen Xcode is needed

My Workflow

  • GitVersion control and collaboration
  • DockerConsistent environments everywhere
  • CI/CDAutomating the path to production
  • GitHubCollaboration and code review
  • Reverse ProxiesRouting, HTTPS and service exposure

Programming Languages

  • JavaRobust and secure, it's the foundation of corporate environments and large-scale systems.
  • PythonLeading language in Artificial Intelligence, Data Science, and automation.
  • TypeScriptIndustry standard that brings security and scalability to the modern Web.

03Get in touch

GitHub@sh4wty1LinkedInin/lfassialvesYoutube@fassidev