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Resume

Eduardo Sotero, Senior Frontend Engineer

Florianópolis, Brazil · Full EST overlap

eduardoliberatosotero@gmail.com · github.com/dudusotero · linkedin.com/in/eduardoliberatosotero

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Experience

Senior Frontend Engineer · Career Certifiedvia Toptal

2026 - Present

  • Rebuilding the AD Banker site from the first commit with a team of frontend engineers. It replaces the live site at cutover rather than being changed underneath it.
  • Static on purpose, with no frontend framework: Eleventy and Nunjucks generate the pages, a separate webpack 5 pipeline builds the Sass and the JavaScript, and page behaviour stays small vanilla modules.
  • Contentful is the CMS, reached through data adapters that each ship with a fallback module, so a CMS outage cannot take the build down with it.
  • Ships to S3 and CloudFront. The GitLab pipeline logic lives in Dagger's TypeScript SDK, and Terraform stands up one environment per stage.

Senior Software Engineer · Lithios Apps

2026 - Present · Raleigh, NC · Remote

  • I lead AI engineering across the company: I set the standards for Claude Code and Cursor, and run the internal training for engineers.
  • Built the platform every client project now starts from: Next.js and Vite on the frontend, Fastify APIs, MongoDB/MySQL, Bull queues, Better Auth, S3 and Sentry, deployed to Railway. Standing up a new MVP went from two days to thirty minutes, environment variables included and demo-ready.
  • Building a library of Claude Skills, specialized agents that automate engineering work. One reviews maintenance-contract candidates against the technical and usability criteria leadership set, then writes up a standard report.
  • I own client products end to end, from the interface down to the data layer and the deploy.
  • Started as a full-time direct hire and now continue hourly, still owning the AI standards and the platform.

Senior Frontend Engineer · Rooms To Govia Toptal

2022 - 2026

  • Owned the buying journey of a top US furniture retailer with millions of monthly visitors, from the storefront interface to the data layer.
  • Led the storefront's migration from Gatsby to Next.js, route by route, with the Gatsby app serving live traffic the whole way instead of a single cutover.
  • Designed and built the GraphQL BFF that unified the storefront's services into one schema. Then made it the standard integration path for new features.
  • Worked the serverless side of the same storefront: Firebase Cloud Functions handled user creation and the analytics pipeline, and checkout ran on several payment providers rather than one.

Software Engineer · FemTec Health / Birchboxvia Toptal

2022

  • Modelled the content schema and the i18n routing for three regional storefronts, so US, UK and Spain share components and diverge only in content.
  • Took engineering out of the publishing path: non-technical teams manage localized content on their own.

Senior Frontend Engineer · Mothershipvia Toptal

2022

  • Owned the product pages and refactored the map interface that dominated their LCP, from the render path down to how the data reached it.
  • Integrated HubSpot lead capture using GraphQL, Styled-components, and Apollo.

Frontend Developer · The Clorox Companyvia Toptal

2021 - 2022

  • Built marketing pages for the Hidden Valley and Kingsford brands, embedding React components into the WordPress platforms behind them.
  • Migrated the smaller brand sites off Eleventy onto Next.js.

Frontend Engineer · Lithios Appsvia Toptal

2021 - 2022

  • Built the components and frontend structure across startup projects, on React with REST APIs, Redux, Jest, Tailwind CSS, and Styled-components.
  • This engagement led to a direct hire at Lithios Apps in 2026.

Chief Technology Officer · Artio Events, Inc.

2020 - 2021 · Salt Lake City, UT · Remote

  • CTO and first engineer. Architected a live events platform from commit zero: scheduling, live audience interaction, and video delivery, on PostgreSQL, Firebase and AWS.
  • The broadcast played through Video.js over HLS. Twilio ran the WebRTC breakout rooms that covered the intervals, with Socket.IO carrying chat and room state, so attendees could talk while the stream was off air.
  • Owned every technical decision, down to the React and TypeScript standards the team built on, the data model and the deploy. Took the product to launch.

Front-end Engineer · FeraCode

2019 - 2020 · Florianópolis, Brazil

  • Led architecture for a B2C media-exchange marketplace across web, mobile and APIs, on React, TypeScript, Node.js, GraphQL and REST.
  • Built the charts by hand in D3, working at the level of scales, axes and data binding rather than off a component library. Routing ran on React Router.
  • Managed a team of 4 engineers, owning delivery from the interface through the integrations behind it.

Front-end Developer · CreativeDrive

2018 · Florianópolis, Brazil

  • Turned designs into responsive interfaces with React and Angular at agency pace, meeting tight deadlines.
  • Reused component patterns across projects, cutting rework between clients.

Web Developer · VHL Sistemas

2017 - 2018 · Florianópolis, Brazil

  • Built and maintained frontend features of a time-management platform in AngularJS, Vue, and PHP.
  • Added E2E tests with Nightwatch.js and component patterns to reduce regressions.

Skills

Frontend

TypeScriptReactNext.jsReact RouterDesign SystemsFigma to ReactTailwind CSSStorybookJestVitestCypressPlaywrightD3 / ChartingVideo.js / HLSAccessibility (WCAG 2.2)Core Web Vitals

APIs & Data

GraphQLApollotRPCREST APIsBFF architectureSchema designPostgreSQLMongoDBAuthenticationStripe

Runtime & Infrastructure

Node.jsFastify / ExpressServer ComponentsRoute HandlersServer ActionsCachingEdge runtimeBackground jobsFirebase / Cloud FunctionsDockerAWSVercelCI/CDSentry

AI Engineering

Claude CodeClaude SkillsAgent DesignMCP ServersCursorSpec-first promptingAnthropic APIStructured output

Education

  • Universidade do Sul de Santa Catarina

    Bachelor's in Information Systems · 2011 - 2016

  • Senac Santa Catarina

    Technician, Java Development · 2010

Languages

  • Portuguese · Native
  • English · Fluent, C1
  • French · Basic to intermediate