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
Resume
- English
- Portuguese
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
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
