senior frontend engineer · react · system design

Mateus
Ramos

Senior Frontend Engineer

7+ years delivering scalable frontend systems across insurance, mining, agritech, and fintech. Focused on React, TypeScript, design systems, and product-aligned engineering across international teams.

Years of experience

Companies

Countries

LinkedIn Get in touch

// about me

Crafting interfaces people enjoy using

Senior Frontend Engineer with 7+ years of experience across insurance, mining, retail, agritech, and fintech. I build scalable frontend systems — from greenfield MVPs to banking products used by thousands — always with a strong focus on accessibility, performance, and long-term maintainability.

Currently at LendingClub, contributing to digital banking products and an internal design system. I thrive in cross-functional teams (product, design, backend, DevOps) and fully English-speaking environments.

Languages

🇺🇸

English

Advanced

🇧🇷

Portuguese

Native

Status Available for freelance

Location Minas Gerais, Brazil 🇧🇷

Relocation Open ✈️

Focus Frontend · Design Systems

Experience 7+ years

Education CS — UNIARAXÁ

LinkedIn in/mateuzor →

// tech stack

Tools I work with

Specialized in the React ecosystem — from component libraries to micro frontends, design systems, and AI-powered product development.

⚛️ React

▲ Next.js

🔷 TypeScript

📱 React Native

🟨 JavaScript ES6+

🖖 Vue.js

🟩 Node.js

🏗 Micro Frontends

🔷 System Design

📦 Design Systems

🖥 SSR / SSG

🔄 Redux

🔀 Zustand

🔁 Context API

🧪 Cypress

🧬 RTL

♿ A11y / WCAG

🔍 Lighthouse / SEO

💅 Styled Components

🎨 Sass / CSS Modules

📖 Storybook

🐜 Ant Design

🗂 Git / CI-CD

🔥 Firebase

🔌 GraphQL / REST

🌍 i18n

🤖 Claude / OpenAI API

⚡ Cursor / Claude Code

// work history

Where I've worked

Senior Frontend Engineer current

LendingClub · San Francisco, California, USA

Apr 2022 → present · 4 years 🌎 Remote / USA

Design, build, and maintain digital banking products and internal tools using React, Next.js, Vue.js, and TypeScript in a fully English-speaking, Agile/Scrum environment.
Launched multiple banking features with measurable impact on product adoption and business growth across thousands of users.
Key contributor to the component library and design system — building accessible, reusable components following WCAG guidelines and cross-browser standards.
All features shipped with comprehensive unit and integration tests integrated into CI/CD pipelines for long-term stability.

React Next.js Vue.js TypeScript Redux Design Systems Storybook Cypress CI/CD

Frontend Developer

Kiwi Grocery · Calgary, AB, Canada

Mar 2021 → Mar 2022 · 1 year 🇨🇦 Canada

Built a cloud-based internal management system from scratch for a Canadian grocery delivery startup — covering orders, driver routing, coupons, warehouse inventory, and product catalog.
Worked with the founding team to translate logistics workflows into automation features, supporting a successful market launch.
Helped reduce order processing time by ~25% through real-time data handling and responsive UI delivery.

React TypeScript Redux Toolkit Ant Design CSS Modules

Frontend Engineer

Easymine · Araxá, MG, Brazil

Mar 2020 → Mar 2021 · 1 year 🇧🇷 Brazil

Led refactoring of a legacy desktop platform into a modern web system used by 1,000+ employees, including teams from CBMM — one of the world's largest niobium mining companies.
Delivered responsive UIs across desktop and mobile for field operations, enabling ~60% reduction in access time to critical systems.
Prioritized accessibility-first development, cross-browser compatibility, and performance throughout.

React Redux Context API Ant Design A11y

React Developer · part-time

Agryo · Lewes, Delaware, USA

Sep 2020 → Mar 2021 · 6 months 🌎 Remote / USA

Built a geospatial intelligence platform for agribusiness — empowering banks, insurers, and agri-cooperatives across LATAM and North America to assess planting risks.
Engineered triangulation-based crop area visualization modules; improved mapping interface contributed to ~30% reduction in manual verification time.
Built a scalable component system with Storybook and full i18n support for multi-language users.

React TypeScript Styled Components Storybook i18n

Fullstack Software Engineer

OurBox.io · Araxá, MG, Brazil

Apr 2019 → Mar 2020 · 11 months 🇧🇷 Brazil

Built core features for early-stage startups at an accelerator using React and React Native — enabling MVPs to launch 2x faster and improve investor presentations.
Architected a medical SaaS app in React Native integrated with real-time backend services, helping clinics reduce no-show rates and digitize patient workflows.
Built marketing websites and landing pages for real estate firms, improving conversion rates by up to 40%.

React React Native Node.js Firebase Styled Components

Frontend Developer Intern

BitPagg · Araxá, MG, Brazil

Aug 2018 → Apr 2019 · 8 months 🇧🇷 Brazil

Built high-performance landing pages and modernized internal tools using React and Bootstrap — improving cross-device accessibility and increasing campaign engagement by ~25%.
Developed modular email templates in collaboration with design and marketing teams, reducing campaign setup time by 70%.
Integrated multiple third-party APIs and applied WCAG, SEO, and Lighthouse best practices.

React Bootstrap SEO Git

// education

Academic background

BASc Computer and Information Sciences

UNIARAXÁ Centro Universitário · Araxá, MG, Brazil

Jun 2014 – Jun 2018

BASc Computer and Information Sciences · incomplete

Universidade Federal de Viçosa · Viçosa, MG, Brazil

Feb 2012 – Oct 2014

// contact

Let's work together

Open to new opportunities — remote, hybrid, or relocation. Let's talk.

github.com/mateuzor/my_pocs

+55 34 98435-9656

Open to freelance & projects

Looking for a technical partner for your product, SaaS, or app? I take on freelance projects and collaborations. I work fully remote and can adapt to any timezone.

Send me an email