Senior Frontend Engineer | React, TypeScript, Microfrontends & Design Systems
Hi! I’m Lucas Guinalia Ruy, a Senior Frontend Engineer passionate about building scalable, high-performance apps with React + TypeScript. With over 9 years of experience, I specialize in:
- Microfrontends & modular architectures (FSD)
- Design Systems & component libraries
- Monorepos & scalable codebases
- Performance optimization & automation (CI/CD, testing)
- Mentoring tech teams and driving best practices
I thrive in complex environments, leading technical initiatives and enabling teams to ship faster and with more quality.
Frontend:
React, Next.js, TypeScript, JavaScript (ES6+), Redux, Zustand, React Query, React Hook Form + Zod
Architecture & Tooling:
Module Federation, Microfrontends, Design Systems, Storybook, Webpack, Vite, RSPack, Rollup, TurboRepo, Monorepos, Feature-Sliced Design (FSD)
Testing & Quality:
Jest, React Testing Library (RTL), Cypress, ESLint, Prettier, SonarCloud, DangerJS
DevOps & Infra:
CI/CD (GitHub Actions, Azure DevOps, GitLab CI), npm packages, Docker, Monitoring (New Relic, Splunk, Sentry)
Also:
Node.js, NestJS, Express, REST APIs, Agile/Scrum, technical documentation
- GFT Technologies (2025–now): Leading legacy migration to microfrontends, creating reusable libraries, and evolving frontend standards across squads.
- Arcotech (2021–2025): Staff Engineer, architecting monorepo strategy, building internal tools for monitoring and microfrontends communication, technical mentorship.
- PagSeguro PagBank (2020–2021): Developed payment experiences (PIX), improved reliability and performance, integrated BFFs with observability.
- Leroy Merlin (2019–2020): Revamped home & loyalty pages, increased conversion, delivered cross-device interfaces.
- Enext / NewBlue / Freelance (2015–2018): From entry-level to mid-level, handled e-commerce, dynamic UIs, and animation-heavy landing pages.
- Evolving English skills (Intermediate 🚀)
- Advanced monitoring & observability in large-scale frontends
- Deep dives into frontend architecture patterns and performance
Always seeking clarity, performance, and sustainable solutions.
Let’s build something amazing!