Gui Cazaroto

I work across the main frontend frameworks and tools on the market, including React, Next.js, Vue, Nuxt, and Angular. I am also comfortable working on legacy products with MVC frameworks, template engines, legacy code, jQuery, and CSS frameworks such as Bootstrap, Material UI, and others.

My frontend work goes beyond assembling screens. I work comfortably with browser APIs, build Progressive Web Apps, handle performance-sensitive interfaces, use WebAssembly when the workload calls for it, and can manage complex refactors in systems where maintainability, speed, and product continuity matter.

I have also contributed to important open-source JavaScript libraries and frameworks, which shaped the way I think about quality, APIs, and long-term maintainability.

I work with REST and GraphQL APIs, MVC systems, and I can also handle more complex architectures such as Hexagonal Architecture and Clean Architecture. Across those projects, I use different languages and frameworks, including Node.js, PHP, .NET, Express, NestJS, Laravel and Ruby on Rails.

I have experience with relational and non-relational databases such as MySQL, PostgreSQL and MongoDB. In addition, I have worked on integrations with payment systems, email marketing platforms and CMSs.

Most of my mobile experience has been in hybrid development, using frameworks such as React Native and Expo to build and evolve applications across iOS and Android from a shared codebase.

I also have native mobile experience that complements this work: migrating an iOS app from Objective-C to Swift and using Java on Android to implement push notification modules with Firebase.

Beyond implementation, I have published apps to the App Store and Google Play, set up CI/CD pipelines for mobile projects, and integrated tools for user behavior tracking and usage analytics.

At the beginning of my career, I spent much of my time working in web design, designing and building website themes. Over time, I deepened my UX knowledge by working with product teams to turn ideas into interfaces that are clear, intuitive, and easy to use. I believe UX and UI should be approached with attention to both interface quality and how they will work in the real world.

I have also worked on heuristic analysis and interface improvements, identifying opportunities to reduce friction and make existing experiences more effective. In addition, I have planned dashboards and data visualizations with the goal of making information clearer and easier to understand.

In DevOps, my work focuses on configuring CI/CD pipelines with modern tools such as GitHub Actions and Azure Pipelines to automate builds, tests and deployments. My goal is to create a more consistent and maintainable path from code changes to production while reducing manual steps throughout the delivery process.

I have experience with cloud infrastructure, including virtual machines, storage, containers, and service providers such as AWS, Azure, Google Cloud Platform, and Expo. I have also worked on cache, domain, and DNS configuration, as well as monitoring with tools such as Sentry and New Relic, in order to improve performance, increase visibility, and help teams respond when issues arise.

As a developer, I built a solid foundation in data pipelines, data preparation, and the structures behind data delivery and analysis. I also gained practical knowledge of machine learning and applied AI, including regression models, decision trees, ensembles, gradient boosting, and neural networks. I am also familiar with data processing, visualization, and the goal of turning data into insights for product decisions.

I have practical development experience with agents and subagents, MCP, RAG, and documentation strategies designed to improve context quality and the consistency of generated results.

I have experience with different CMS platforms, including WordPress projects involving custom themes, plugin development, SEO, and integrations with tools such as HubSpot CRM, email marketing platforms, and Google Analytics. I have also worked with headless platforms such as Craft CMS, Strapi, and Hygraph.

I can define content models, structure editorial flows, and connect CMS platforms to frontend frameworks and mobile applications. I help teams manage content more efficiently and deliver it consistently across websites, apps, and other digital experiences.

Beyond implementation, I contribute actively to product development by helping teams translate business goals and user needs into viable technical decisions. This includes evaluating technologies, clarifying constraints, understanding tradeoffs, and finding the right balance between delivery speed, maintainability, scalability, and cost.

I understand the product lifecycle from discovery and problem definition through prioritization, MVP scoping, delivery, measurement, and iteration. As a developer, I collaborate with product, design, and business stakeholders to identify risks, refine requirements, and shape practical solutions that keep implementation aligned with product strategy.