I began investing in 2005 while still in medical school. In 2007, I started trading on the Brazilian stock exchange. 

By 2008, I was investing in the forex market using automated robots. For many years, I saw good returns with my stock portfolio in Brazil. 

Through day and swing trading with robots in forex, I had excellent years and others not so much; my results were unstable, though I tended to win more than lose. 

In 2020, I started investing in cryptocurrencies with robots, and in 6 months, I turned $32,000 into over $1 million. I stopped trading and exited this market upon identifying the end of that bull market cycle. 

Also in 2020, I began to study macroeconomics in depth, which became part of my analysis process, using fundamentals in my analysis as well and keeping up with new technologies. This is how I identified opportunities in cryptocurrencies, recognizing a time when the macroeconomic scenario was favorable, blockchain was an emerging technology, and then I developed a portfolio strategy that had an edge in selecting cryptocurrencies. 

Nowadays, my strategy is focused on long/short in the US stock market, aiming to buy (long) the best stocks (usually large tech stocks with high growth potential, solid business moat, but also some excellent defensive stocks) or ETFs of the best sectors and sell (short) ETFs that have poor strategies and/or prospects.

Investor

Marcello Vieira - Investidor de Sucesso

I founded 'Successful Investor' while working full time as a doctor back in 2012, teaching people how to invest more effectively.

The strategies have evolved over time, but I only teach what I do with my own money.

We now have over 15,000 students learning about investments in crypto and stocks with the goal of achieving financial freedom.

Founder

Medical Doctor

The All-Weather Investor | Building a $5M portfolio—$1M already achieved | Sharing everything I learn along the way

Strategic stock investing for Wealth Managers and Family Offices.

Wealth preservation is essential. 

But true financial stewardship requires strategic growth—built on conviction, discipline, and risk management.

Many wealth managers and family offices struggle to find stock investment strategies that deliver superior returns without unnecessary complexity. Our approach bridges that gap.

I’m Marcello, a former doctor turned full-time investor with two decades of experience in stock and crypto markets. 

Since 2016, I have worked with wealth managers, family offices, and high-net-worth individuals to implement investment strategies that maximize performance while protecting capital.

In 2020 and 2021, my momentum-based approach transformed $32,000 into over $1 million. 

Today, we refine and apply that strategy for professionals seeking an edge in the markets.

What we offer: 

↳ Institutional-grade stock strategies designed for long-term performance
↳ Risk-managed investment frameworks to navigate uncertainty with confidence
↳ Tailored solutions for wealth managers and family offices seeking scalable, high-conviction strategies

If you're looking to strengthen your portfolio strategy with a proven, data-driven approach, email me at marcello@mdvinternational.com

Marcello Duarte Vieira

Banco Itaú

- Hands-on development of scalable and high-performance web and mobile applications;
- Expert in using Angular and React to create dynamic, responsive, and user-centric interfaces;
- Advocate for best practices in front-end development, including the use of appropriate frameworks, libraries, and tools;
- Implemented a range of software design approaches and UX patterns to improve user experience;
- Promoted InnerSource practices to enhance team collaboration and project outcomes;
- Practiced and implemented unit testing using Jest and end-to-end testing using Cypress to ensure the quality and reliability of applications.

Frontend Engineer | React | Angular | Javascript | Typescript | HTML | CSS | Developer

KNN Idiomas Brasil

- Responsible for the web application, creating interfaces and maintaining codes using Vue, Vuex, Vuetify, HTML, CSS and JavaScript;
- Led migration of Vue.js frontend from v2 to v3 with Composition API, Pinia, Vite and TypeScript, optimizing performance and leveraging latest features.
- Implement components and pages created by designer from Figma and Adobe XD tool;
- Developing RESTful APIs using FastAPI in Python and managing database models with SQLAlchemy.

Frontend Engineer | VueJs | Javascript | Typescript | Vuex | Vuetify | HTML | CSS | Developer

Freelancer

- Development of web applications using React, Javascript, TypeScript, Next.js, HTML and CSS;
- Implementation of user interaction functionalities;
- Integration with external APIs;
- Efficient componentization aimed at code reusability and maintainability.

Freelancer | Frontend Engineer | React | Javascript | TypeScript | Next.js | HTML | CSS | Developer

Hello, I am a frontend developer with over 2 and a half years of experience, specializing in VueJS development.

In 2021, I had my first programming experience when I decided to study at Rocketseat, where I gained knowledge of Javascript, HTML and CSS, and later moved on to ReactJS. After studying for a while, I realized that this was my calling, and I wanted to persue a career in something I enjoy, always eager to code every day and all day long.

I have been working professionally in frontend development since 2022, promarily with VueJS technology, including Angular, React and Typescript. In my work, I prioritize well-organized code for easy maintenance and focus on visual aspects and responsiveness because I care deeply about ensuring client satisfaction across desktop, tablet, and mobile screens.

Feel free to check out my profile on GitHub and my portfolio:
- GitHub: https://github.com/neto112
- Portfolio: https://portfolio-neto112.vercel.app/

I am passionate about technology, always seeking to learn, share knowledge, and take on new challenges.

Oh! I hold a degree in chemical engineering from the University of Vale do Itajaí. I enjoy Netflix, sports, hamburgers, and particularly love working on projects with Vue.js. Also, I am a person with disabilities (PWD), specifically a bilateral cochlear implant user and an oral communicator.

Technical skills:

Frontend Developer | Responsive web design
VueJS;
React;
Angular;
Javascript;
Typescript;
Vuex;
Vue Router;
Pinia;
Vuetify;
HTML5 | CSS3 | Bootstrap | Tailwind CSS | SASS
Python;
REST API;
PostgreSQL;
GitHub;
React | Next.js;
WordPress;
Firebase;
Docker;
Jest for unit testing;
Cypress for end-to-end testing;
Git version control;

Tools:
Visual Studio Code;
Figma | Adobe XD
Github Projects;
Discord;
DBeaver;
Vercel;
Insomnia;

Interpersonal skills:
Problem-solving;
Agile/Kanban methodologies;
Collaboration and teamwork;
Strong commitment to code quality.

taplio

The Battle

Marcello Duarte Vieira

Cristiano Neto

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