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Senior Software Engineer
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
English - Intermediate (B2)
Portuguese - Native
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
Feb 2026 - Present | Freelance
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
• 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
• 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
May 2023 - Jul 2023 | Hepta Tecnologia e Informática
Architected micro-frontend architecture using Module Federation in a monorepo
• 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.
• Created a consistent, accessible UI library with Chakra UI, accelerating development and delivering 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.
Sep 2021 - Feb 2023 | CI&T Software
• Architected and launched a comprehensive financial data platform for Anbima from the ground up using React and Next.js, creating a modern system for collecting and publishing managed portfolio information with strict regulatory compliance.
• Implemented hybrid rendering strategies (SSR for SEO-critical financial content, CSR for interactive dashboards), significantly improving page load times, Core Web Vitals, and organic search visibility for financial product data.
• Designed reusable component libraries with React and TypeScript, ensuring consistency, maintainability, and rapid development of new features.
• Engineered robust data validation workflows and integrated with back-end APIs using optimized data fetching strategies to deliver real-time portfolio information.
• Provided ongoing maintenance and multilingual support for Coca-Cola's promotional platforms across Latin America and the Caribbean, serving millions of users in 20+ countries within the Adobe Experience Manager (AEM) ecosystem.
• Managed multilingual content workflows in AEM, coordinating translations and regional adaptations for Brazil, Mexico, Argentina, Colombia, and Caribbean markets.
• Delivered critical production support during high-traffic promotional campaigns, ensuring rapid incident response, front-end fixes, and 99.9% uptime.
• Implemented front-end enhancements with Vanilla JavaScript, HTML, and CSS to improve user experience, mobile responsiveness, and cross-browser compatibility.
• Collaborated with AWS infrastructure teams and leveraged GitHub Actions CI/CD pipelines for reliable multi-country deployments.
Oct 2020 - Sep 2021 | Meta Serviços em Informática
Zarp Localiza Platform – Technology Restructuring & SEO Optimization
• Led the complete technology and infrastructure restructuring of the Zarp Localiza platform, migrating to React and Next.js to establish a modern, scalable architecture that improved developer productivity and platform performance.
• Drove SEO strategy to achieve #1 organic rankings: Implemented comprehensive optimizations including semantic HTML, structured data, Next.js SSR, and Core Web Vitals improvements that propelled the platform to top positions in organic search results, driving significant growth in organic traffic.
• Championed CI/CD adoption with Azure DevOps: Introduced and implemented automated build, test, and deployment pipelines in Azure DevOps, reducing release cycles, minimizing manual errors, and enabling rapid iteration on features and SEO enhancements.
• Optimized user experience and the sales funnel: Leveraged Hotjar (heatmaps, session recordings) and Datadog (performance monitoring) to analyze user behavior, identify friction points, and implement UX improvements that positively impacted conversion rates.
• Selected and standardized front-end technologies: Led the technology selection process, establishing React, Next.js, and TypeScript as the core stack, ensuring code quality, reusability, and long-term maintainability across the platform.
Nov 2019 - Oct 2020 | Invillia
Invillia Apps Suite – Team Management & Remote Work Platform
• Developed full-stack features for the Invillia Apps Suite, a platform designed to optimize team management and remote work, working across front-end (React, TypeScript, Redux, D3.js) and back-end (Node.js, Express, MySQL).
• Engineered integration with Microsoft Teams, enabling seamless access to team management tools, attendance tracking, and productivity metrics within the corporate communication platform.
• Optimized memory usage across React components and Redux state management, profiling and refactoring to eliminate leaks and improve stability for long-running remote work sessions.
• Built interactive data visualizations with D3.js, creating dashboards that displayed team performance, productivity trends, and resource allocation to support data-driven management decisions.
• Designed and delivered RESTful APIs with Node.js and Express, ensuring reliable data delivery from optimized MySQL databases to front-end applications.
Apr 2019 - Nov 2019 | Unimed Rio Preto
Led the development of a unified healthcare portal that consolidated patient services, implemented secure Java/Spring Boot authentication, automated CI/CD pipelines, and integrated third-party services while establishing real-time monitoring to enhance security, efficiency, and user experience.
• Delivered a unified digital experience for healthcare beneficiaries: Led the development of a portal that consolidated financial management, exam scheduling, and appointment booking, empowering patients to manage their healthcare needs in one place.
• Improved security and user access: Implemented a robust authentication API with Java and Spring Boot, ensuring secure access to sensitive health and financial data for thousands of beneficiaries.
• Enabled proactive system monitoring: Deployed Grafana dashboards that provided real-time visibility into system health, API performance, and user activity, reducing mean time to detection (MTTD) for incidents.
Jul 2018 - Apr 2019 | Bnex
Promoter Tracking Platform & JBS Analytics
• Managed and developed a web and mobile back-office platform for tracking promoters at retail locations, building React Native mobile applications for field staff and ASP.NET MVC web dashboards for operations teams.
• Delivered data visualization dashboards for JBS: Designed interactive dashboards that tracked promoter performance and retail results, enabling JBS stakeholders to monitor KPIs and make data-driven decisions in real-time.
• Engineered ETL processes for partner data integration: Developed and maintained Pentaho ETL pipelines to load, transform, and integrate partner data into SQL databases, ensuring comprehensive reporting and analytics.
• Maintained end-to-end data infrastructure: Supported the entire data lifecycle from ETL processing to dashboard visualization, ensuring data accuracy, reliability, and timely availability for business intelligence.
• Developed across multiple technology stacks: Leveraged Java, .NET C#, Node.js, React Native, and Pentaho to deliver integrated solutions for promoter tracking and partner data integration.
Sep 2017 - Jul 2018 | WDG Automation
• Led process automation and chatbot development for Toyota Rodobens recall campaigns using WDG Automation and Bizagi BPMN Modeler, streamlining customer notifications, appointment scheduling, and follow-up communications
• Structured end-to-end customer service projects for recall management, mapping optimized workflows that improved coordination, reduced manual effort, and enhanced the customer experience for affected vehicle owners
• Implemented RPA solutions that automated repetitive tasks, ensuring timely communication with vehicle owners and improving recall campaign effectiveness.
• Developed a custom Google Chrome extension using JavaScript for Claro telemarketing teams, automating customer lookup, call logging, and data entry tasks.
• Boosted agent productivity by reducing manual work and enabling faster access to customer information, allowing agents to focus on customer engagement and increasing call efficiency.
• Integrated the extension with existing telemarketing systems and CRM tools, ensuring seamless data
Responsável pela automação de processos e desenvolvimento de chatbots, além da estruturação de projetos de atendimento para recalls na <strong>Toyota Rodobens</strong>
Desenvolvimento de uma extensão para o Google Chrome voltada para telemarketing da <strong>Claro</strong>
Tecnologias: WDG Automation, Bizagi BPMN Modeler e JavaScript
Oct 2013 - Sep 2017 | Emais Urbanismo e Incorporações
Mission-Critical ERP/CRM System – Fiscal, Accounting, Financial & Real Estate Management
• Provided maintenance, support, and continuous development for a comprehensive ERP and CRM system built with Delphi and Microsoft SQL Server, serving fiscal control, accounting, financial management, and real estate portfolio operations.
• Ensured system reliability and business continuity through proactive maintenance, timely bug fixes, and responsive user support, minimizing downtime and disruptions to critical business functions.
• Developed new features and modules across multiple domains, adapting the system to evolving business requirements in fiscal compliance, financial reporting, and real estate portfolio tracking.
• Optimized Microsoft SQL Server databases, designing efficient stored procedures, indexes, and queries to ensure fast data access, data integrity, and accurate reporting.
• Maintained and enhanced legacy Delphi code, balancing stability with performance improvements and new functionality to extend the system's useful life.
• Developed deep domain expertise in fiscal regulations, accounting principles, financial management, and real estate operations to effectively support and evolve the system.
Nov 2011 - Jun 2013 | Freelancer
Provided tax obligation automation services for multiple clients
Tech: Windows Forms, .NET C#, Microsoft SQL Server
Jan 2011 - Nov 2011 | Dual Consultoria e Sistemas
Maintained ERP software for distributor management
Developed ERP system for financial and tax compliance
Tech: Progress 4GL
Mar 2008 - Jan 2011 | Hexa Informática
Developed and maintained optical network management system
Tech: Delphi, Microsoft SQL Server
Dec 2005 - Mar 2008 | Condor Informática
Maintained ERPs for financial control and tax compliance
Developed internal data management tool for Police Department (DIG)
Tech: Delphi, Firebird
Dec 2004 - Dec 2005 | SOC Informática
Provided consultancy and developed tax obligation file delivery solutions
Offered computer sales, assembly, and maintenance services
Tech: Delphi, Firebird
Feb 2023 - Jul 2026 | UNESP
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 network infrastructure projects, information security management, IT project management, service provision, hardware acquisition, software configuration, governance, and software development
Mar 2018 - Mar 2020 | Senac São Paulo
Distributed processing and storage, visualization and data loading projects, introduction to statistics and business intelligence
Jan 2015 - Dec 2017 | Fatec Rio Preto
Informatics for Business, Software Development, and Business Management
Highest GPA Award
Best Undergraduate Project Award
Jan 2002 - Jul 2003 | Etec Philadelpho Gouveia Netto
Technical training in logic, hardware maintenance, and Web/Desktop development
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01 maio 2025Descubra as aventuras e desafios de configurar um home server
Bem-estar
01 fevereiro 2025Ao longo deste ano, estou dedicando-me a desenvolver ideias claras e uma organização para alcançar minhas metas
D3.js
11 setembro 2024Visualização de dados com gráfico de setores / pizza / torta com D3.js
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.






