JOHNY

Senior Software Engineer

Summary

Johny William de Oliveira Alves, Senior Software Engineer with 20+ years of experience delivering scalable solutions in fintech, telecom, and consumer goods. He led high-impact projects for clients like Coca-Cola and Anbima, building systems for millions of users. Expert in React, Node.js, TypeScript, and CI/CD, with a strong focus on performance optimization and team mentorship. Currently expanding into machine learning and eager to contribute to 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 development of scalable full-stack platforms with React, Next.js and Firebase

    • Founded and developed TCG RP: Architected and built a comprehensive event management and organization platform from the ground up using React, Next.js, and a Contentful with monorepo, resulting in a scalable and maintainable web solution.

    • Engineered a dual-platform ecosystem: Developed both a public-facing interface and a secure administrative area, integrating Firebase for real-time data synchronization and user management, streamlining back-office operations.

    • Created an end-to-end certification system: Designed and implemented a full-stack certification and tracking platform using React, Next.js, Express, and Contentful, enabling automated certificate issuance and progress monitoring for trainees.

    • Established internal training programs: Led front-end development training and consulting sessions, empowering teams to master React and Next.js, which accelerated project delivery and improved code quality across the organization.

  • Sep 2024 - Feb 2026 | WeFit

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

    Architected modular brokerage platform with hybrid Next.js architecture (SSR/CSR)

    • Architected a modular brokerage management platform using a hybrid Next.js architecture (SSR/CSR), ensuring high performance, scalability, and an optimized user experience for brokers.

    • Built a reusable component library with React, TypeScript, and Tailwind CSS, guaranteeing design consistency across the platform and accelerating development velocity for new features.

    • Improved code quality and team capability by leading technical reviews (Core Review), enforcing coding standards, and mentoring junior developers in React and Next.js best practices.

    • Developed interactive analytical dashboards with Recharts, transforming complex data into clear visual insights for business stakeholders.

  • Jul 2023 - Sep 2024 | Seguralta

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

    Architected and launched Seguralta Core insurance platform with React, Next.js, and FastAPI

    • 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.

    • Established a scalable front-end architecture by implementing a reusable component library with bit.dev/bit.cloud and Storybook, ensuring design consistency and accelerating development velocity across multiple projects.

    • 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.

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  • Jan 2002 - Jul 2003 | Etec Philadelpho Gouveia Netto

    Computer Technician

    Technical training in logic, hardware maintenance, and Web/Desktop development

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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

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.