Frontend Developer

Messias
Junior

5+ years building impactful user experiences. React, Next.js, performance.

🇧🇷 Brazil🇯🇵 Japan

Building fast, accessible experiences that scale.

From healthcare platforms serving millions to lean startups — I ship with focus on performance and UX.

WorkExperience

Full-Stack Developer

MedPrev

June 2022 - Present

Leading development of healthcare platform serving 2M+ monthly visitors. Achieved top 2+ Google rankings through SEO optimization, implemented Backend for Frontend (BFF) architecture with GraphQL and REST APIs, and built scalable component libraries with Storybook. Utilized Datadog for performance monitoring, implemented A/B testing with Google Optimize, and developed comprehensive testing strategies with Jest and React Testing Library. Enhanced user engagement through interactive features and microinteractions.

Front-end Developer

WeFluence

Dec 2021 - Nov 2022

Defined tech stack and created essential front-end components using React.js, Next.js, and TypeScript. Collaborated closely with teams to deliver high-quality user interfaces.

Front-end Developer

Codengage

May 2019 - Dec 2019

Developed web applications using React, Tailwind CSS, and Gatsby. Managed projects autonomously and maintained direct client communication.

Front-end Developer

CodePlus Junior Enterprise - UTFPR

Sep 2017 - Nov 2018

Developed web applications using JavaScript, HTML, CSS, SASS, Bootstrap, and jQuery. Built solid foundation in front-end development.

Skills& Tools

Focused on React, Next.js, and type-safe APIs. Here's what I work with day to day.

Current focus

ReactNext.jsTypeScriptGraphQL

Frontend

Vue.jsNuxt.jsJavaScriptTailwind CSSStorybook

Backend & data

Node.jsGraphQLREST APIsPostgreSQLStrapi CMS

Testing & quality

JestPlaywrightReact Testing Library

Observability & analytics

DatadogGoogle AnalyticsGoogle Tag ManagerGoogle OptimizePostHogSEOPerformanceA/B Testing

Infrastructure & process

AWSDockerCI/CDGitAgile/Scrum
Education
In Progress

MBA – Full Cycle Software Architecture

Full Cycle by Code Education

March 2025 – December 2026

Completed

B.S. in Software Engineering

Federal University of Technology – Paraná (UTFPR), Brazil

March 2017 – December 2022

Completed

Research Exchange – Artificial Intelligence

Shibaura Institute of Technology, Tokyo, Japan

March 2020 – March 2021

Let's build.

Open to new opportunities and collaborations.

linkedin.com/in/messias-junior