Lucas Cardoso Medeiros

Lucas Cardoso Medeiros

About

Detail

Frontend Developer | React | JavaScript | Typescript | Next.js | HTML | CSS
Minas Gerais, Brazil

Contact Lucas regarding: 
work
Full-time jobs
Starting at USD4.8K/month
person_search
Finding candidates
groups
Networking

Timeline


work
Job
school
Education
folder
Project (professional or personal)
auto_stories
Publication

Résumé


Jobs verified_user 0% verified
  • Somewhere
    R
    Senior Frontend Engineer
    Somewhere, Refersion
    Aug 2025 - Jan 2026 (6 months)
    Worked on a US-based affiliate marketing platform processing 600K+ orders/day, helping e-commerce companies manage and scale their partner programs. The main challenge was improving merchant self-service. They struggled with onboarding, affiliate prospecting, and platform navigation, creating high support volume. • Rebuilt the core merchant experience by redesigning affiliate onboarding and Shopify integration flows, reducing customer support dependency and enabling faster, friction-free setup • Led component architecture strategy by auditing Figma designs, creating a roadmap for implementing 20+ reusable, responsive and accessible components using Tailwind CSS, improving UI consistency • Built an AI-powered affiliate discovery feature fro
  • Montreal Oficial
    Senior Frontend Developer
    Montreal Oficial
    Mar 2025 - Aug 2025 (6 months)
    Short-term contract during my relocation from Portugal to Brazil. Worked on an enterprise e-commerce management platform (500+ users) with complex authentication requirements. • Led frontend testing strategy, establishing testing infrastructure from 0% to 90% coverage (Jest/React Testing Library)—identifying critical bugs pre-deployment and improving release reliability • Built secure authentication flows (WebAuthn, TOTP, Keycloak integration) in close collaboration with backend and DevOps, ensuring enterprise-grade security standards • Improved CI/CD pipeline efficiency by 30% through GitLab optimizations, streamlining release cycles • Acted as senior technical advisor in a small cross-functional team, driving improvements to agile ceremo
  • Growin
    Senior Frontend Developer | React at CGI
    Growin
    Aug 2024 - Dec 2024 (5 months)
    Short-term contract during my relocation from Portugal to Brazil. Worked on an enterprise e-commerce management platform (500+ users) with complex authentication requirements. • Led frontend testing strategy, establishing testing infrastructure from 0% to 90% coverage (Jest/React Testing Library)—identifying critical bugs pre-deployment and improving release reliability • Built secure authentication flows (WebAuthn, TOTP, Keycloak integration) in close collaboration with backend and DevOps, ensuring enterprise-grade security standards • Improved CI/CD pipeline efficiency by 30% through GitLab optimizations, streamlining release cycles • Acted as senior technical advisor in a small cross-functional team, driving improvements to agile ceremo
  • Avenue Code
    Emma
    Senior Frontend Developer | React at Emma
    Avenue Code, Emma
    Feb 2024 - Jul 2024 (6 months)
    Worked for a subscription-based e-commerce company focused on personalized sleep products, operating at scale with strong emphasis on performance and user experience. The team was transitioning away from Vue 2 (EOL) and needed to rebuild core parts of the application while establishing modern frontend standards. • Led technical execution of a Vue 2 to React/Next.js migration, rebuilding core modules (navigation, dashboard, home) and improving page load time by 60% leveraging React expertise to accelerate team delivery velocity by 70% • Co-architected frontend technical foundation with another senior engineer, defining standards for TailwindCSS + Radix UI integration, ESLint rules, and project taxonomy • Built a complete design system from
  • Mindera
    Aubay Portugal
    Frontend Developer
    Mindera, Aubay Portugal
    Feb 2022 - Feb 2024 (2 years 1 month)
    Worked on a large-scale international e-commerce platform (2,000+ stores across 8 countries, 1.5M+ products in UK alone) serving high daily traffic across multiple markets. • Delivered high-impact performance optimizations, improving Lighthouse scores from 30 to 78 across critical pages (Home, PLP, PDP)—significantly boosting Google rankings and conversion rates • Led implementation of advanced frontend optimization techniques (lazy loading, code splitting, caching, memoization) as part of a 5-engineer team, reducing bundle size by 60% and dramatically improving Time-to-Interactive • Established comprehensive testing strategy (Vitest, Playwright), achieving 95% test coverage and improving release confidence—enabling the team to ship featur
  • Inter
    Frontend Developer
    Inter
    May 2021 - Jan 2022 (9 months)
    Digital banking platform serving millions of users across Brazil. Led frontend refactor of the payment page, integrating PIX payment functionality—enabling millions of users to access Brazil's instant payment system with improved UX and reliability Established design system standards for the internet banking platform, defining reusable component patterns that improved consistency and accelerated feature delivery
  • Rock Content
    Frontend developer
    Rock Content
    Sep 2020 - Apr 2021 (8 months)
    Content marketing SaaS platform with international reach. Co-architected a greenfield multi-language platform (React/TypeScript/AWS) supporting 3 markets (Portuguese, English, Spanish), establishing frontend architecture and development patterns Designed and implemented reusable design system components, significantly reducing bundle size and improving application performance through optimized component architecture
  • Dito CRM
    Frontend Developer
    Dito CRM
    Jun 2019 - Aug 2020 (1 year 3 months)
    Marketing automation and CDP platform serving enterprise retail clients. Developed data visualization dashboards for a CDP serving 150M+ consumers across hundreds of retail clients and 10,000+ connected physical/e-commerce stores Modernized legacy JavaScript codebase to ES6 and SCSS alongside 2 engineers, improving mobile responsiveness across 10+ pages and significantly enhancing code maintainability
  • Avenue Code
    Frontend Developer
    Avenue Code
    May 2018 - May 2019 (1 year 1 month)
    • Developed responsive and user-friendly web pages using AEM (Adobe) and Vue.js. • Enhanced and updated web pages to improve SEO and API consumption capabilities. • Participated in grooming meetings to analyze and gather requirements, contributing to project planning and execution. • Served as a technical recruiter, conducting 6 technical interviews and evaluating coding challenges. • Involved in internal projects, including the development and maintenance of the company’s website in React, and teaching computer science to children using Code.org.
  • TaskInternet
    Software Developer
    TaskInternet
    Feb 2015 - Jan 2018 (3 years)
    • Worked on the development and maintenance of internal web products, focusing on performance, reliability, and usability. • Acted as lead developer on a custom CMS project for client websites, improving content management workflows. • Improved application performance through code optimization and load time reduction. • Mentored interns and collaborated on requirements analysis and project delivery with stakeholders.
  • TaskInternet
    Web Developer Internship
    TaskInternet
    Jan 2013 - Jan 2015 (2 years 1 month)
    - Optimized back-end processes of internal systems, streamlining workflows and eliminating the need for intermediate manual processes. - Developed projects and web systems (internal and for clients), including integration with external web services and WordPress blogs. - Created and adjusted web pages, newsletters, and email marketing campaigns, ensuring responsiveness and configuring SEO tags.
  • N
    Web Developer Internship
    Nuts Design de Ideias
    Jan 2012 - Dec 2012 (1 year)
    - Developed PHP/MySQL code within HTML pages, ensuring functionality and efficiency. - Styled pages using CSS, creating visually appealing and functional web pages.
Education verified_user 0% verified
  • Centro Federal de Educação Tecnológica de Minas Gerais
    Bachelor's Degree in Computer Engineering, Computer Engineering
    Centro Federal de Educação Tecnológica de Minas Gerais
    Jan 2009 - Dec 2015 (7 years)
Projects (professional or personal) verified_user 0% verified
  • Z
    Zac - O Esquilo
    Aug 2014 - Jun 2015 (11 months)
    Web game with an accessible version for people with motor disabilities using the One-Switch technique (Accessible One-Switch Game for Motor Impaired Players). Based on the classic "Frogger", the game consists of crossing a scenario with some obstacles. (Based on classic game "Frogger", this game consists on crossing the scenario going through some obstacles)
Publications verified_user 0% verified
  • S
    Developing an Accessible One-Switch Game for Motor Impaired Players
    SBGames
    Dec 2015