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Johann Pereira

@johannpereira

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I build accessible, high-performance front-end platforms for B2B and B2C products.

Brazil

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What I'm looking for

I'm looking to build high-quality, accessible web products in a remote, asynchronous environment where I can own features, collaborate through clear communication, and contribute across front-end and full-stack delivery.

At Materialize, I build responsive front-end platforms for B2B clients including Hoopr, Apassul, Psiuapp, and Truss Intelligence. I manage full-stack project cycles independently and have delivered data-driven platforms for mining and maritime operations.

I've improved accessibility by 30% at Reside Admission, increased tablet-user sales through responsive design, and built a complete scalable frontend from scratch at Materialize using Elm, Sass, and Tailwind CSS.

I work comfortably in remote, asynchronous teams using Slack, Linear, GitHub, and Figma, with a focus on UI/UX, SEO, web accessibility, and reliable delivery.

Experience

Work history, roles, and key accomplishments

Current

Frontend Engineer / Full-stack Developer

Current

Materialize

Feb 2025 - Present (1 year 6 months)

Delivered high-quality front-end features independently for multiple B2B clients by managing full-stack project cycles in a software factory environment. Enhanced project delivery speed for clients like Hoopr and Apassul by architecting and building responsive front-end platforms from scratch.

JavaScript TypeScript React HTML5 SASS Figma GitHub Docker Supabase Webpack Vite CI CD Agile

Front-end Engineer

Weon

Sep 2024 - Mar 2025 (6 months)

Improved platform stability and code maintainability by refactoring a legacy codebase using Vue2/Vue3 and clean code principles. Accelerated feature deployment cycles by integrating micro-frontends and TypeScript into the phone's infrastructure and WhatsApp API services.

Vue3 TypeScript JavaScript SCSS Vuetify Micro Frontends Clean Code Vue.Js 3 QA Testing

Maintenance Specialist

Easy Synergy

Feb 2024 - Sep 2024 (7 months)

Freelancer for Yuval R. at Easy Synergy to:
Increased site speed by 40% by updating legacy Elm libraries and migrating the build system from Webpack to Vite. Simplified deployment processes by implementing automated CI/CD workflows and fixing critical production bugs.

Elm Webpack Vite CI CD Performance Optimization Debugging

Web Developer - Front End

Reside Admission

Aug 2022 - Jan 2024 (1 year 5 months)

Increased sales from tablet users by enhancing site responsiveness through the implementation of Tailwind CSS and Styled Components. Improved site accessibility by 30% by refactoring legacy React code to meet WCAG standards, significantly enhancing inclusivity and user experience.

React JavaScript TypeScript Tailwind styled components Accessibility API Integration

Web Developer - Front End

Materialize

Jun 2021 - Oct 2022 (1 year 4 months)

Achieved 100% platform delivery from scratch by architecting the full frontend using Elm, Sass, and Tailwind CSS, creating a highly responsive and scalable application. Maximized organic traffic by optimizing all interfaces for SEO and ensuring high-performance and responsive design across all screens.

Elm SASS Tailwind SEO Responsive Design Figma UI UX