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Miguel Machado

@miguelmachado1

Senior Software Engineer at Fostr building assessment flows, and at Uber delivered the Eats multicart feature that increased order value.

Brazil

Message

At Fostr, I architected and delivered an EdTech SaaS question flow system from scratch, including reusable components and assessment workflows with auto-save and stage validation. I used React and TypeScript, and reached more than 95% test coverage for critical user-facing workflows.

At Uber, I led development of the Uber Eats multicart feature, enabling orders from multiple restaurants in one cart and increasing average order value by 15%. I also built a personal project, Before The Hunt, with a delivery loop for AI coding agents, CI-checked evidence, and TLA+ modeling for supporter checkout.

Experience

Work history, roles, and key accomplishments

Current

Senior Frontend Engineer

Current

Fostr

Nov 2025 - Present (1 year)

Architected and delivered a complete question flow system for an EdTech SaaS from scratch in 3 weeks, owning all technical decisions. Built about 20 reusable components with shadcn/ui and implemented clean architecture with React, TypeScript, and TanStack Router.

React TypeScript TanStack Router Shadcn Ui Vitest React Testing Library

Current

Backend Dev Lead & Mentor

Current

Forja

Jan 2023 - Present (3 years 10 months)

Lead backend teams in projects that simulate tech company dynamics, offering market-ready experience to developing professionals. Directed squads, defined architecture, conducted code reviews, and mentored junior and mid-level developers.

Go Technical Leadership Project Management Mentorship Code Review

Full Stack Engineer

Globant

Jan 2023 - Nov 2025 (2 years 10 months)

Engineered GraphQL features in Golang and Supabase for Salesforce, optimizing performance with 30% faster response times. Developed back-office and e-commerce apps for Carrefour Group and Dick's Sporting Goods, integrating AI features that reduced customer service call times by 20%.

Go Supabase GraphQL Apollo Server NodeJS React TypeScript Vite Vitest Jest React Testing Library React Native Next.js Storybook NestJS Kotlin

Frontend Engineer

Uber

Apr 2022 - Jan 2023 (9 months)

Led development of Uber Eats multicart feature, increasing average order value by 15%. Built responsive React UI components and optimized data fetching with a GraphQL layer, slashing payload sizes by 60%.

React GraphQL Go Jest React Testing Library Accessibility

Senior Frontend Engineer

Cornershop by Uber

Sep 2021 - Apr 2022 (7 months)

Engineered store-facing features for inventory management and product catalog systems, enhancing merchant operational efficiency by 25%. Led integration of react-query, improving data fetching and caching strategies.

React React Query ESLint Prettier Testing

Frontend Developer

Pixter

Sep 2020 - Sep 2021 (1 year)

Developed frontend applications for Porto Seguro projects with focus on testing, accessibility, and performance optimization. Improved application performance by an average of 30% based on Google Lighthouse and PageSpeed Insights metrics.

Testing Accessibility Performance Optimization Google Lighthouse PageSpeed Insights

Full Stack Engineer

Prion Soluções em Sistemas

Feb 2020 - Sep 2020 (7 months)

Built full-stack applications using C# (.NET Core), Vue.js, and Node.js microservices. Developed API and component generators, cutting feature delivery time by 25%.

C#.NET Core Vue.Js NodeJS Microservices

Full Stack Developer

Agência Mizu

Mar 2018 - Jan 2020 (1 year 10 months)

Built e-commerce front ends on VTEX with HTML, Sass, and JavaScript, automating builds with Gulp and Grunt. Moved newer projects to React, Next.js, and Node.js, and used Docker on full-stack work.