LYSZT: Full-Stack Developer & Software Engineer for Modern Web Solutions

La simplicité est la sophistication suprême.


I am a full-stack developer who builds modern, scalable web applications and software solutions. Specialized in minimalist design, computational graphics, machine learning, and performance optimization.

Hello, my name is João Luís.

Building Scalable Web Solutions in English, French & Portuguese.

I work as a full-stack developer and software engineer, specializing in modern web applications, complex software systems, and minimalist user interfaces. With expertise in React, Node.js, Python, and C++, I create performant, scalable solutions that solve real problems. I'm available in French, English, and Portuguese, working with clients in Paris, New York, São Paulo, and worldwide. If you need a developer who combines technical expertise with clean, minimalist design principles, let's build something exceptional together.

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Lex E. S.
Therapist at an American University
João stands out as an individual who combines hard work with a natural flair for understanding and executing his responsibilities efficiently. He brought my website www.lexenricosanti.com up to the next level. One of João's most notable qualities is his self-motivation. He consistently demonstrated an ability to undertake tasks with enthusiasm and diligence, often surpassing our expectations.
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Sean P.
Co-founder of a Microsoft Partner
João has completed a number of video editing projects for Fidelity Factory. The quality of his deliverables are very high, he is an excellent communicator, finishes his projects ahead of schedule, offers creative insight and is able to consistently deliver the vision that we express. I expect that he would be a valuable member of any team that he is a part of.
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Here's what I can do for you.

Web Development.

I build modern, responsive web applications using the latest technologies and frameworks. My expertise includes React, Node.js, Express, and Tailwind CSS for creating fast, scalable solutions. Every project emphasizes performance optimization, SEO best practices, and clean code architecture to ensure your web presence is both beautiful and technically excellent. I focus on minimalist design principles that prioritize user experience and functionality.

Software Engineering.

Proficient in Python, C++, and full-stack development, I create robust software solutions for complex problems. My experience spans data science, machine learning, computational graphics, and algorithm optimization. I build everything from Discord bots and automation tools to data analysis systems and web APIs, always focusing on maintainable, scalable code and efficient system architecture.

Open Source.

I contribute to and maintain creative open source projects that push the boundaries of web development and software engineering. From Discord bots with advanced analytics to developer productivity tools, my projects emphasize clean architecture, innovative solutions, and community collaboration. Currently building Litessera.

Explore my craft.

  • COMMISSIONS
  • ENTERTAINMENT
  • CINEMA

Therapy with Lex

I designed the sections regarding publishing, supervision, and coaching in a fancy, intuitive fashion. Learn more

CASE STUDIES

MARKET ANALYSIS

A detailed analysis of Embraer as of July 30, 2025, covering its diversified portfolio, recent financial performance, and the challenges and opportunities in its global supply chain. Created using Kairos Insight III, my company analysis software.

Embraer - Analysis of the Supply Chain

PORTFOLIO PIECE

LYSZT is a modern portfolio design created by myself based on luxury brands, modernism and simplicity. It is the definition of my personal brand.

LYSZT - A modern and interactive portfolio

DISCUSSION

How to sell your article through the utilisation of design and aesthetics? What makes for a good figure and what may you use to make them?

Principles for making figures for research

PORTFOLIO PIECE

This website was for Lex E. Santi, a therapist and writer with a highly engaging career spanning literary journals, federal government, and international higher education.

THERAPY WITH LEX

PORTFOLIO PIECE

Lygon Xin represents a unique blend of videography, design, and storytelling. From helping influencers build their presence in the entertainment industry to collaborating with companies in Canada and the United States, Lygon Xin's work showcases innovation and creativity. One of its standout projects is the hilarious and unpredictable YouTube miniseries *Shadow*.

LYGON - A Service Agency Dedicated to Design, Animation, and the Arts

PORTFOLIO PIECE

MACTAB is a manufacturer of industrial floor-ceiling partitions and corporate solutions.

MACTAB - How interactive design can help your business

PORTFOLIO PIECE

Blade Zenon was a 2015 MMORPG project where every member situated within the website participated by sharing their ideas and designs, which were integrated into the game.

BLADE ZENON - A collaborative game made by its players