I am a Full Stack Developer with solid experience in building web and mobile applications and solutions, working from conception to delivery of scalable, well-structured, and high-performance systems. I have strong expertise in frontend with React and Vue.js, backend with Node.js and PHP (CodeIgniter, Laravel, Symfony and Zend), as well as experience in mobile development with Flutter and React Native.

I work with relational and NoSQL databases such as MongoDB, MySQL, PostgreSQL, PL/SQL and Firebase. I follow software engineering best practices such as Clean Architecture, Clean Code, CI/CD, SOLID, TDD, and containerization with Docker.

I have experience with messaging systems (Kafka), real-time communication via Webhooks and WebSockets. I also have hands-on experience with automated testing (PHPUnit, Pest and Jest), as well as monitoring tools such as Sentry, SonarQube, Datadog and Rancher, always focusing on reliability, maintainability, and continuous system evolution.

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Education:

• JavaScript Specialization (JS Expert – Erick Wendel)
• Postgraduate Degree in Database Administration – FAMEESP
• Bachelor's Degree in Systems Analysis and Development – UNICESUMAR
• Technical Degree in Game Programming and Development – City Computer

Expertise:

• Robust backend with PHP and Node.js
• Modern frontend with React and Vue.js
• Mobile development with Flutter and React Native
• Microservices and Event-Driven Architecture
• WebSockets, Webhooks and real-time systems
• Automated testing and code quality
• Linux, servers and development environments
• AWS, Docker and Kubernetes

Experience:

• Working as a contractor (CNPJ) on maintenance and modernization of systems and real-time applications

Community & Recognition:

• Speaker at DevParaná community
• Mentor at NASA Hackathon

Achievements & Projects:

• JavaScript pipeline for DNA/RNA chloroplast analysis
• Article about Event-Driven Architecture within World of Warcraft
• Crowdfunding platform in React for musicians (College final project)
• Self-developed game published on my website, available for free download
• Developed an AI-powered system that converts guitar recordings into tablature using machine learning
• Developed 2D/3D browser games with AI agents that learn from player behavior and adapt dynamically

Continuous Learning:

Always studying and evolving in areas such as AI, distributed systems and scalable architecture.

Languages:

• Portuguese (Native)
• English (Advanced)

Links:

• Email: guilhermelonghini@gmail.com
• GitHub: github.com/nikolayevsk404
• LinkedIn: linkedin.com/in/nikolayevsk404