Senior Fullstack Software EngineerErechim, Brazil

Frontend precision.
Commerce outcomes at scale.

I design and ship high-conversion e-commerce experiences with frontend precision, performance focus, and clean architecture.

Senior engineer with 7+ years building scalable web products across high-traffic commerce environments. Strong in React, Next.js, Node.js, performance optimization, and delivery quality with testing.

Portrait of Gustavo Tartas

7+ years

Hands-on product engineering

5M+

Daily users supported in fashion e-commerce

600+

Physical stores connected in omnichannel flows

Core Web Vitals

Continuous monitoring and optimization

Selected impact across enterprise commerce products

Dimension-based purchase calculator

Created guided room-size logic for carpet selection with data-driven recommendations.

Improved product customization usability and reduced friction in checkout decisions.

Homepage video support rollout

Enabled mixed media carousels for one of the most visited pages in U.S. e-commerce.

Increased campaign flexibility and user engagement for marketing initiatives.

Remote payment links

Built secure anonymous checkout links for distributed sales teams across Brazil.

Expanded remote sales capacity with faster conversion outside physical stores.

Experience shaping high-traffic products

Senior Fullstack Software Engineer

Home Depot

Oct 2024 - Present

United States (Remote)

Driving continuous improvements in a large-scale e-commerce platform with focus on architecture, frontend quality, and measurable performance.

  • Built and improved critical product page flows for quantity, color, and configuration personalization.
  • Delivered a dimension calculator for room-based recommendations to optimize purchase decisions.
  • Shipped homepage upgrades including video support inside carousels for richer campaigns.
  • Monitored and optimized Core Web Vitals through New Relic, with focus on LCP and responsiveness.
  • Contributed to testing strategy with Jest and supported architectural decisions in a senior team.
ReactTailwind CSSGraphQLNode.jsExpressJestGCPNew Relic

Senior Fullstack Software Engineer

Aggrandize

Feb 2023 - Oct 2024

Brazil

Led development of a nationwide commerce platform for Frigelar, enabling complete sales lifecycle and operational scalability.

  • Designed and implemented end-to-end cart workflows with product, service, discount, branch, and payment orchestration.
  • Integrated multiple payment methods including PIX, cards, cash, and internal credit.
  • Built remote payment links to support device-independent checkout for external customers.
  • Delivered customer onboarding for CPF/CNPJ profiles with role-based access controls.
  • Mentored junior engineers and guided architectural standards and frontend quality.
ReactRedux-SagaBootstrapNode.jsExpressWebSocketReact Testing Library

Fullstack Software Engineer

Aggrandize

Jun 2021 - Feb 2023

Brazil

Worked on Brazil's largest fashion e-commerce modernization, bridging legacy architecture and modern React/Next.js delivery.

  • Developed smartphone-camera product recognition to connect users to matching product pages.
  • Implemented nearest-store locator with stock availability for omnichannel shopping.
  • Led phased migration from JSP to React with overnight launches to reduce revenue risk.
  • Maintained legacy and modern stacks simultaneously while improving responsiveness and reliability.
ReactNext.jsNode.jsExpressMobXJavaJSPJest

Fullstack Software Engineer

Meta Brazil

Sept 2020 - Jun 2021

Brazil

Contributed to fleet monitoring delivery and launched a new commerce platform from scratch.

  • Implemented final product stages for TicketLog monitoring with React/Next.js and data visualization.
  • Built BFF and frontend modules for Britania e-commerce in a fullstack role.
ReactNext.jsNode.jsExpressMobXRecharts

Frontend Software Engineer

Compass UOL

Nov 2018 - Sept 2020

Brazil

Owned frontend delivery for Camicado list experiences, including creation and payment journeys.

  • Delivered wedding and event list creation flows focused on conversion and usability.
  • Maintained and evolved guest payment interfaces as the primary frontend engineer in the squad.
Vue.jsjQueryE-commerce UX

Frontend-first stack with fullstack depth

Frontend

ReactNext.jsTypeScriptJavaScriptTailwind CSSStyled-ComponentsMaterial UI

State & Architecture

Redux-SagaMobXContext APIZustandClean Architecture

Backend & APIs

Node.jsExpressREST APIsGraphQLWebSocketJavaNest.jsFastApi

Quality & AI

JestReact Testing LibraryGitHub CopilotOpenAI APIsMCPCI/CD Optimization
  • Portuguese (Native)
  • English (Highly proficient)
  • Spanish (Working knowledge)

Let's build products users remember

Available for senior frontend and fullstack opportunities focused on product impact, performance, and scalable architecture.