JOHNY

Senior Software Engineer

Summary

Johny William de Oliveira Alves, Senior Frontend Engineer with 20+ years of experience delivering scalable web apps in fintech, telecom, and consumer goods. Expert in React, Next.js, and TypeScript, driving 99.9% uptime and millions of users in high-impact projects for clients such as Coca-Cola and Anbima. Currently pursuing a Master’s in Computer Science, specialized in Deep Learning and AI, with a strong focus on mentorship and CI/CD automation to accelerate software delivery.

  • Languages

  • English - Professional Working Proficiency (B2 - Intermediate)

  • Portuguese - Native / Fluent

Tech Stack

  • Languages

  • Frameworks & Libraries

  • Data & Analytics

  • DevOps & Tools

  • HTML/HTML5

  • CSS/CSS3

  • Java

  • JavaScript

  • Python

  • TypeScript

  • D3.js

  • Express.js

  • Gatsby

  • Jekyll

  • Module Federation

  • Next.js

  • Node.js

  • React

  • Redux

  • Spring Boot

  • Styled Components

  • Tailwind CSS

  • SQL Server

  • MySQL

  • PostgreSQL

  • Python

  • R

  • AWS

  • Azure DevOps

  • BPM

  • Docker

  • Git

  • Jenkins

Experience
Education
Courses & Certifications
  • Sep 2024 - Present | WeFit (outsourcing for Porto Seguro)

    Senior Front-End Engineer | React & Next.js Specialist

    • Designed a scalable frontend ecosystem for Porto Seguro's brokerage operations using React, Next.js, JavaScript, TypeScript, Recharts and Tailwind CSS, including reusable component libraries that accelerated development by 36% and ensured 100% visual consistency, plus a hybrid SSR/CSR architecture that cut page load times by 36% for high‑volume operations. The CI/CD pipeline (Jenkins) with automated tests (Jest, Playwright) and AWS hosting (S3, CloudFront) ensured that every deployment met performance and reliability standards.

    • Elevated engineering excellence by leading code reviews, mentoring junior developers in React/Next.js best practices, and proactively mapping errors before users noticed them. I also established comprehensive test suites with Jest (unit/integration) and Playwright (end‑to‑end), integrated into the CI/CD pipeline (Jenkins), thereby reducing incident response time across all modules and improving release confidence.

    • Built high‑impact analytical dashboards with Recharts, transforming complex financial data into real‑time visual insights that empowered Porto Seguro stakeholders to make faster, data‑driven strategic decisions.

  • Jul 2023 - Sep 2024 | Seguralta

    Senior Front-End Engineer | React & Next.js Specialist

    • At Seguralta, I built an insurance platform from scratch using microfrontends (Module Federation), design systems, and integrations with REST APIs and GraphQL (via DatoCMS for headless content), delivering real‑time dashboards with load times under 1.5 seconds and supporting peaks of 3x more users without performance degradation.

    • Accelerated team growth by mentoring junior developers to independent delivery through structured code reviews and GitFlow practices, and established a continuous validation pipeline with ESLint, unit tests (Jest), and end‑to‑end tests (Cypress), eliminating regressions and ensuring release confidence.

    • Implemented a quality and monitoring ecosystem with New Relic and SonarQube, automating deployments with BitBucket Pipelines and GitLab CI/CD to optimize Core Web Vitals, using Turborepo to manage the monorepo and AWS (S3, CloudFront, Lambda) for hosting and continuous integration.

  • May 2023 - Jul 2023 | Hepta Tecnologia e Informática

    Senior Front-End Engineer | React & Next.js Specialist

    • Developed the front-end for CREA-SP's electronic ART platform, enabling engineering professionals to digitally register and manage Technical Responsibility Notes, using reusable, type-safe components (React/Next.js/TypeScript) and a consistent, accessible UI library with Chakra UI.

    • Designed and implemented a micro-frontend architecture with Module Federation in a monorepo managed with Turborepo, ensuring modularity, scalability, and autonomy for multiple teams to develop and deploy features independently.

    • Managed the full development lifecycle in Azure DevOps, including version control, CI/CD pipelines, and automated quality checks, ensuring reliable, efficient, and high‑quality releases from build to production.

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  • Feb 2023 - Jul 2026 | UNESP

    Master's in Computer Science

    Master's program in Computer Science at Universidade Estadual Paulista "Júlio de Mesquita Filho"

    Focus: Digital Image Processing, Advanced Topics in Visualization, and Deep Learning

  • Oct 2020 - Dec 2022 | Fatec Rio Preto

    Specialization in IT Project Management

    Specialization in network infrastructure projects, information security management, IT project management, service provision, hardware acquisition, software configuration, governance, and software development

    Analizo - Textual analysis for corporate communication validation
  • Mar 2018 - Mar 2020 | Senac São Paulo

    Specialization in Big Data

    Distributed processing and storage, visualization and data loading projects, introduction to statistics and business intelligence

    Proposal for application of Association Rules for online retailers
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  • Mar 2026 | EF SET

    English C1 (Advanced): Effective proficiency

  • Jul 2023 | Scrum.org

    Professional Scrum Developer I

  • Jul 2022 | Voxy

    High Intermediate English (B2)

  • Apr 2020 | Udemy

    Gatsby: Create a site PWA with React, GraphQL and Netlify CMS (9 hours)

  • Sep 2018 | Igor Alcantara

    Data Science and Machine Learning in Python (8 hours)

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Articles

Highlights

Magenta "#e0138c" na aplicação de SEO

Web Magenta "#e0138c" na aplicação de SEO

Usando o termo "#e0138c" e regras do SEO para alcançar a otimização em resultados nas ferramentas de busca

Construindo o layout 2.0, refazendo esta página

Web Construindo o layout 2.0, refazendo esta página

Documentando o processo e descobertas na reconstrução o layout desta bela página

Portfolio Showcase

Contact

Can I help you with anything? Do you have any questions or suggestions? Get in touch via social media or send an email. I'll be happy to answer.