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

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

    • Engineered a scalable front-end ecosystem and reusable component libraries using React, Next.js, and TypeScript, which accelerated development velocity by 36% and ensured 100% design consistency across all brokerage modules.

    • Architected a high-performance brokerage management platform leveraging a hybrid Next.js architecture (SSR/CSR), resulting in a 36% improvement in page load times and a seamless, scalable experience for high-volume broker operations.

    • Elevated engineering excellence by leading technical code reviews and mentoring junior developers in React and Next.js best practices, proactively mapping errors before user reports, establishing test suites to validate deliveries, and enabling rapid incident response that reduced time-to-fix across all brokerage modules.

    • Designed high-impact analytical dashboards using Recharts, transforming complex financial datasets into real-time visual insights that empowered business stakeholders to make faster, data-driven strategic decisions.

  • Jul 2023 - Sep 2024 | Seguralta

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

    • Architected and launched Seguralta Core, a comprehensive insurance brokerage platform built with React, Next.js, and FastAPI, providing franchisees with real-time access to commissions, renewals, and policy expiration data, streamlining critical business operations.

    • Drove 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.

    • Engineered a robust quality and monitoring ecosystem: Integrated New Relic for performance monitoring, SonarQube for code quality analysis, and comprehensive testing (Jest, Testing Library, Cypress), while automating deployments with BitBucket Pipelines to optimize Core Web Vitals and ensure system reliability.

  • May 2023 - Jul 2023 | Hepta Tecnologia e Informática

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

    • Architected and developed the front-end for CREA-SP's electronic ART platform, enabling engineering professionals across São Paulo to submit and manage Technical Responsibility Notes for works and services through a modern, intuitive digital interface.

    • Designed and implemented a micro-frontend architecture using Module Federation within a monorepo, ensuring modularity, scalability, and the ability for multiple teams to develop and deploy features independently.

    • Built reusable, type-safe components with React, Next.js, and TypeScript, establishing a solid foundation for continuous platform evolution and maintainability.

    • Delivered a consistent, accessible UI library with Chakra UI, accelerating development and ensuring a professional, responsive user experience across all platform modules.

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

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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)

  • See more

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

Projects

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.