markkop.dev_
Marcelo "Mark" Kopmann

// Connect

GitHubOpen-source projects and experimentsLinkedInProfessional profile and contactX / Twitter@heymarkkopInstagram@markkop.devBlogArticles on DEV Community

// Talks

Self-Hosting & AI Tooling

Self-Hosting & AI Tooling

Aug 25, 2026 Meetup Codecon FLN Hostgator, Florianópolis

How to self-host AI tooling and keep your development workflow under your own control

cursorcodexcoolifyhostingerhermes
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State of AI 2025

State of AI 2025

Mar 22, 2025 Meetup FloripaJS Neoway, Florianópolis

Find out how to keep up with AI and how people are using it when it comes to software development

flowboltsunoai json videobrowsertoolscursorclaudeLLM Arena
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10x Dev AI

10x Dev AI

Oct 1, 2024 Meetup Codecon FLN Time Out, Florianópolis

Discover which AI tools you need to know to stay ahead and boost your productivity

v0PhindAiderCursor@AICodeKing@intheworldofaivideopodcast
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Habitica Talk

Habitica Talk

Sep 7, 2019 Flask Conf Softplan, Florianópolis

How I used Habitica to gamify my life and make my first open source contribution

Habiticagithubblogpostpr
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Rails in 2019

Rails in 2019

Aug 27, 2019 Meetup RubyFloripa Mercado Livre, Florianópolis

Some news, stats and reflexions about Ruby on Rails

RubyRailssurveyblogpost
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// Projects

Halborn

Halborn

Company Website Halborn 2022–present

The public site for an elite blockchain security firm. I led the WordPress to Next.js migration, CMS integration, and the marketing experience.

Next.jsStrapi CMSReactTailwind CSS
Visit
HabitChain

HabitChain

Onchain Product Personal 2026

A habit tracker with real skin in the game, using onchain incentives to turn consistency into commitment.

TypeScriptNext.jsSolidityBase
VisitRepo
Prisma

Prisma

Property Platform Personal 2026

A workspace for collecting real-estate listings, comparing properties, and planning a home purchase.

SvelteElixirPostgreSQLOpenAI
Visit

Todo Idle Quest

Idle RPG Personal 2026

A productivity-powered idle RPG. Completing real tasks, habits, and planner work grants XP, while your hero keeps adventuring while you are away.

SvelteElixirPostgreSQLTypeScript
Visit
BoomSync

BoomSync

Micro-app Personal 2026

A mobile-first helper for the party game Two Rooms and a Boom, with synchronized countdown timers, a room shuffler, and P2P connectivity for game synchronization.

ReactTypeScriptVitePeerJSTailwind CSS
VisitRepo
Guest Planner

Guest Planner

Planning Tool Personal 2025

A focused tool to organize guest lists, invitations, ordering, details, and RSVP status.

TypeScriptNext.jsReact
VisitRepo
Repo Env Generator

Repo Env Generator

Developer Tool Personal 2025

Web utility that scans a GitHub repository for environment variable usage and produces a .env file example.

Next.jsTypeScriptGitHub APIVercel
VisitRepo
Beard Shave Tracker

Beard Shave Tracker

Micro-app Personal 2025

A micro‑app to track shaving history.

ReactTypeScriptNetlify
Visit

Receipt Processor

Utility Personal 2025

Small utility that ingests receipt data and outputs parsed values for budgeting or claims. Built with Replit Agent

JavaScriptReplit
Visit
Prompt Mural

Prompt Mural

Web App Personal 2025

A minimal public board to capture and iterate prompts for LLM workflows; designed for quick capture and sharing during experiments.

Next.jsTypeScriptVercel
Visit
RepoGPT

RepoGPT

Developer Tool Personal 2024

A tool that fetches files from a GitHub repository, merges them into a single context allowing for easy copy–paste into chatbots.

Next.jsTypeScriptOpenAI APITailwind CSSVercel
VisitRepo
LinkTree Clone

LinkTree Clone

Website Personal 2024

A simple linktree clone to make my links more accessible.

Next.jsTailwind CSS
VisitRepo
MMORPG Guild Website

MMORPG Guild Website

Website Personal 2024

A website for the Corvos de Efrim, a guild presente in multiple MMORPGs such as Wakfu, Dofus and Waven.

Next.jsTailwind CSS
VisitRepo
Multiple Playlist Deleter

Multiple Playlist Deleter

Tool Personal 2023

A tool to delete multiple playlists from a Spotify account.

JavaScriptSpotify API
VisitRepo
NFT Marketplace

NFT Marketplace

DApp Personal 2022

A full‑stack DApp for minting, listing, buying, and managing NFTs. Integrates IPFS via Pinata, MetaMask wallet, and testnet deployment scripts.

Next.jsSolidityHardhatEthers.jsIPFSVercelPolygon
VisitRepo
Essence Helper

Essence Helper

Voice App Personal 2022

A Google App/Alexa Skill for ZenithVR MMORPG that delivers in‑game information via natural speech interfaces.

JovoTypeScriptAlexaGoogle Assistant
VisitRepo
Web3 Rewards Tracker

Web3 Rewards Tracker

Web App Multiple Clients 2022

A web app to track crypto rewards for web3 clients and users

Next.jsTailwind CSSGraphQLBlockchainBitQueryPancakeSwap API
VisitRepo
Metaverse Project

Metaverse Project

Prototype ArcTouch 2022

A proof of concept for making a Decentraland plot/scene interacting with external APIs

DecentralandMetaverseTypeScriptWeb3
VisitRepo
Gather Websocket API Integration

Gather Websocket API Integration

API Codecon 2021

An API integration with Gather Websocket to get statistics and create player interactions for the Codecon Online event.

JavaScriptdiscord.jsNode.js
VisitRepo
Gamification API

Gamification API

API Codecon 2021

After building the Codecon Discord bot, we decided to move the gamification logic to a separate API so we could integrate it with the Codecon App

JavaScriptNode.js
VisitRepo
Discord Bot

Discord Bot

Community Bot Codecon 2021

A Discord bot for the Codecon community, used to manage ranks, claims, and token management.

JavaScriptdiscord.jsNode.js
VisitRepo
Web AR Business Card

Web AR Business Card

Prototype ArcTouch 2021

A proof of concept for a business card that uses a marker to display 3D models using Augmented Reality.

AR.jsA-FrameHTMLCSSJavaScript
VisitRepo
Corvo Astral

Corvo Astral

Community Bot Personal 2020

A community-driven Discord bot that collects and serves useful information for Wakfu players.

TypeScriptNode.jsDiscord
VisitRepo
YouTube – Download & Cut

YouTube – Download & Cut

Desktop App Personal 2020

Cross‑platform Electron application to download a YouTube video and cut a clip by time range, with optional MP3 export.

ElectronNode.jsFFmpegYouTube‑DL
VisitRepo
E-Commerce Solutions

E-Commerce Solutions

Integration Linx 2019

As part of Linx team, I was responsible for the integration of the existing search, recommendation, showcase and banners products

JavaScriptPHPjQueryVue.js
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Habitica Scripts

Habitica Scripts

Scripts Personal 2019

One of my first projects, a set of scripts to extend Habitica.com functionality. It features a Pomodoro Timer task, Custom Skills and keyboard shortcurs.

JavaScriptHabitica API
Repo