RAFAEL SAMPAIO TAVARES

Senior Frontend Engineer

Building, optimizing, and scaling modern web applications with deep expertise in React ecosystem and full-stack development experience.

About me

Senior Frontend Engineer who builds, optimizes, and scales. Deep experience in React ecosystem, enhancing legacy systems for thousands of users while architecting new products from scratch.

Frontend Expert

Deep expertise in React ecosystem with modern development practices and performance optimization.

Team Leadership

Experience leading projects and teams, implementing SCRUM methodology and client communication.

Performance Focus

Specialized in optimizing build times, implementing CDN strategies and achieving 90% test coverage.

Professional Experience

Transforming ideas into scalable digital solutions

Kenlo

Senior Frontend Engineer

Apr 2021 - Present
Brazil
7K+
Agencies Served
50%
Build Time Reduction

Key Achievements

  • Led modernization initiatives for whitelabel platform serving 7,000+ real estate agencies

  • Slashed build times by 50% (13min → 7min) through optimization strategies

  • Architected CDN asset management strategy boosting site speed significantly

  • Achieved 90% test coverage with highly decoupled, reusable components

Leadership & Development

  • Developed full-stack applications using React.js, Vue.js, and WordPress

  • Built complex back-office frontend with React, Redux, and Material UI

  • Led SCRUM methodology implementation and weekly client calls

Paguru Digital Solutions

Senior Frontend Developer

Jan 2019 - Apr 2021
Brazil
Multi-client
Full-stack Development

Education

Solid foundation in computer science

UFCG

Computer Science

Coursework toward a BSc

Aug 2013 - Jun 2017
Monitor - Programming Lab II

Java development, design patterns implementation

Monitor - Information Systems I

Java Web applications, Play Framework, Scala

UNIFAP

Systems Analysis & Development

Technologist Degree

Aug 2018 - Dec 2020
8.62
GPA (Brazil scale)
3.44 (US scale)

Projects

Innovative solutions I develop

Full-Stack Mobile App

Developing

Cross-platform mobile application using React Native and Expo, with Nest.js backend and Cloudflare CDN for optimal performance.

React NativeExpoNest.jsCloudflare CDN
Cross-platform
Mobile Development
CDN
Optimized Delivery

DevOps & Infrastructure

Active

Personal homelab with Kubernetes orchestration, managing IT operations for industrial department with focus on system stability.

KubernetesDockerInfrastructure
K8s
Container Orchestration
24/7
System Monitoring

Skills

Technologies and tools I master

Frontend

React.jsVue.jsTypeScriptJavaScriptCSSSASS

Backend

Node.jsNest.jsExpress.jsSequelize

DevOps

KubernetesDockerGCPFirebase

Testing

JestVitestReact Testing LibraryTDD

Tools

ViteWebpackGitSCRUM

Performance

SEOSSRCDNOptimization

Languages

Fluent global communication

Portuguese

Native

English

C1 Advanced

Certifications

Continuous learning and specialization

Certificate in General English (C1)

Language

Seda College - Dublin

Feb 2018

English Language Proficiency Exam

Language

Universidade Federal Rural do Semi-Árido

Aug 2020

React - The Complete Guide

Technical

Udemy - Academind

Aug 2020

ReactJS, Hooks, TDD, Clean Architecture

Technical

Udemy - Rodrigo Manguinho

Dec 2021