JOHNY

Senior Software Engineer

Summary

Johny William de Oliveira Alves, Senior Software Engineer with over <strong>20 years of experience</strong> architecting and delivering scalable solutions across fintech, telecommunications, and consumer goods. Expert in modern architectures using <strong>React, Next.js, and TypeScript</strong>, I have led high-impact projects for global clients such as <strong>Coca-Cola</strong>, serving millions of users with 99.9% uptime, and Anbima, where I architected a greenfield financial platform from the ground up. Committed to engineering excellence, I implemented SEO strategies that achieved #1 organic rankings and performance optimizations that improved system speed by over 30%. Currently a <strong>Master’s candidate in Computer Science (Deep Learning and Artificial Intelligence)</strong>, I am eager to leverage my expertise in <strong>mentorship and CI/CD automation</strong> to contribute to innovative international SaaS product teams

  • Languages

  • English - Intermediate (B2)

  • Portuguese - Native

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
  • Feb 2026 - Present | Freelance

    Front-End Technical Lead | React & Next.js Specialist

    Built and led the development of scalable full-stack platforms with React, Next.js, Contentful, and Firebase.

    • Front-End Technical Lead & Mentor: Delivered expert-led workshops on React and Next.js best practices and D3.js data visualization, empowering cross-functional teams to implement modern development techniques and high-performance frontend patterns

    • Certification Platform: Architected and engineered a full-cycle certification management system (UI/UX to infrastructure) using React, Next.js, and Node.js. Integrated Contentful CMS and Express to automate certificate issuance and progress tracking, significantly reducing administrative overhead and streamlining the certification lifecycle.

    • Event Management: Developed TCG RP, a scalable React and Next.js event platform using a monorepo approach and Contentful CMS. The system features an integrated vendor admin area and a WhatsApp bot for automated event tracking, delivering a maintainable and efficient full-stack web solution

    Estabeleceu programas de treinamento interno, capacitando equipes em React e Next.js

  • Sep 2024 - Feb 2026 | 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 and team capability by leading rigorous technical Core Reviews and mentoring junior developers in React and Next.js best practices, which reduced post-release bugs and standardized high-quality coding workflows.

    • 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 Technical Lead | 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 engineering excellence and team growth by mentoring junior developers, leading code reviews, enforcing GitFlow workflows, and championing Scrum methodologies to foster a high-performance culture.

    • 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.

    Minhas atribuições incluíram a automação de processos, monitoramento contínuo do ambiente com foco em métricas de acesso, detecção e resolução de erros no front-end, otimização de desempenho com Core Web Vitals, integração e a entrega contínuas (CI/CD) e adoção de práticas de qualidade como testes unitários e end-to-end

    Tecnologias: HTML (HTML5), CSS (CSS3), JavaScript, TypeScript, PHP, Python, React, Next.js, D3.js, bit.dev, bit.cloud, BitBucket, BitBucket Pipelines, New Relic, SonarQube, Styled Components, Storybook, GraphQL, Restful, useQuery, FastAPI, Testing Library, Jest e Cypress

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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, 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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  • Sep 2017 | Igor Alcantara

    Fundamentals of Machine Learning (8 hours)

  • Aug 2017 | Igor Alcantara

    Language R (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

Projects

Contact

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