Gustavo Jonathan Oliveira E. Email & Phone Number

São Paulo, São Paulo, Brazil

Freelance jobsDeveloped web applications for various companies, creating products such as business intelligence dashboards (similar to Power BI), financial management systems, etc.- Some companies I have worked with:-- Grafeno: https://www.linkedin.com/company/grafenodigital/-- H&P: https://www.linkedin.com/company/hepsolutions/- Accelerated development by creating isolated components with Storybook- Participated in daily and planning meetings for task… Show more Freelance jobsDeveloped web applications for various companies, creating products such as business intelligence dashboards (similar to Power BI), financial management systems, etc.- Some companies I have worked with:-- Grafeno: https://www.linkedin.com/company/grafenodigital/-- H&P: https://www.linkedin.com/company/hepsolutions/- Accelerated development by creating isolated components with Storybook- Participated in daily and planning meetings for task estimation- Conducted code refactoring- Was responsible for creating and launching new features Show less

Enhanced team performance and stakeholder communication through development support, monitoring tools, and effective reporting practices.- Provided technical support and feedback for more than 5 squads and their stakeholders- Led the enhancement of a reporting tool to track development team performance using DORA Metrics-- Prior to this, tracking these data accurately was not possible. The improvement aided tech managers and stakeholders in monitoring reports and helped the… Show more Enhanced team performance and stakeholder communication through development support, monitoring tools, and effective reporting practices.- Provided technical support and feedback for more than 5 squads and their stakeholders- Led the enhancement of a reporting tool to track development team performance using DORA Metrics-- Prior to this, tracking these data accurately was not possible. The improvement aided tech managers and stakeholders in monitoring reports and helped the development team understand what was needed for improvement.- Implemented the DORA Metrics framework and introduced weekly reporting (akin to 'all-hands' meetings) with tech leaders- Delivered weekly reports to stakeholders on development team performance Show less

Contributed to a food ordering app development, focusing on bug fixes, testing, payment integration, and a PWA for efficient table service.- Dedicated considerable effort to refine and debug a PWA app for a launch.-- Post-launch, the B2B company's clientele increased from 0 to 16 restaurant clients- Developed new features- Conducted code reviews- Performed code refactoring- Executed unit and end-to-end testing- Engineered and launched a new PWA app in less than 3… Show more Contributed to a food ordering app development, focusing on bug fixes, testing, payment integration, and a PWA for efficient table service.- Dedicated considerable effort to refine and debug a PWA app for a launch.-- Post-launch, the B2B company's clientele increased from 0 to 16 restaurant clients- Developed new features- Conducted code reviews- Performed code refactoring- Executed unit and end-to-end testing- Engineered and launched a new PWA app in less than 3 months-- Features included a catalog menu, product ordering, and payment options- Joined into a SLACK period (2 weeks) to refactor and resolve technical debits-- We decided to migrate the client PWA to NEXTJS framework. It became a PWA that was twice as fast: https://medium.com/@glima_77821/como-o-fizemos-o-aplicativo-d2c-da-zak-ser-2x-mais-r%C3%A1pido-9d6f4c9a7f3e Show less

São Paulo, São Paulo, Brasil

Built and optimized SPAs for Fiat, engineered a 3D visualization library, and implemented user action tracking for marketing analysis.- Engineered and deployed new SPA pages, achieving a 70% improvement in load times and enhanced user engagement- Addressed bugs on active pages- Implemented A/B testing cases- Tracked user actions for marketing strategies- Developed and launched a responsive Single Page Application (SPA) for a Fiat promotional campaign, directly generating… Show more Built and optimized SPAs for Fiat, engineered a 3D visualization library, and implemented user action tracking for marketing analysis.- Engineered and deployed new SPA pages, achieving a 70% improvement in load times and enhanced user engagement- Addressed bugs on active pages- Implemented A/B testing cases- Tracked user actions for marketing strategies- Developed and launched a responsive Single Page Application (SPA) for a Fiat promotional campaign, directly generating over 2 million BRL in revenue- Refactored code and a specific 2D car rotation using VanillaJS, resulting in improved accessibility on slower devices- Created a PWA for TV show marketing that excelled in Lighthouse tests, nearly achieving 100 points, and provided a seamless user experience Show less

Coronel Fabriciano, Minas Gerais, Brasil

Crafted a telephony app, enhanced a financial system, and ensured responsive design across devices.- Created an MVP web application from scratch-- Integrated multiple APIs (Third-party, Lyratec, and MVP server)-- Built a Node.js server as middleware between the third-party and Lyratec APIs to provide richer results- Responsible for developing new features for a financial system- Improved responsiveness on mobile, tablet, and large screens-- Following this… Show more Crafted a telephony app, enhanced a financial system, and ensured responsive design across devices.- Created an MVP web application from scratch-- Integrated multiple APIs (Third-party, Lyratec, and MVP server)-- Built a Node.js server as middleware between the third-party and Lyratec APIs to provide richer results- Responsible for developing new features for a financial system- Improved responsiveness on mobile, tablet, and large screens-- Following this improvement, the software's user base expanded- Resolved over 30% of help-desk bugs, enhancing database stability and performance in MongoDB and MySQL Show less

Ipatinga, Minas Gerais, Brasil

Developer focused on adaptable client management solutions, intuitive UX, and meeting client needs.- Initiated the development of ISP software- Validated new features with the client and noted potential improvements- Conducted meetings with the client to gather information on issues and transformed them into interfaces

Coronel Fabriciano, Minas Gerais, Brasil

Optimized software performance, enhanced system reliability, and modernized development practices in a growth-focused professional setting.- Improved legacy software performance by more than 100%-- Optimized SQL queries-- Moved servers to another infrastructure-- Removed unused libraries and code-- Implemented caching- Worked daily as a full-stack maintainer, providing support for at least 10 system users-- Fixed bugs in SQL queries-- Addressed front-end and… Show more Optimized software performance, enhanced system reliability, and modernized development practices in a growth-focused professional setting.- Improved legacy software performance by more than 100%-- Optimized SQL queries-- Moved servers to another infrastructure-- Removed unused libraries and code-- Implemented caching- Worked daily as a full-stack maintainer, providing support for at least 10 system users-- Fixed bugs in SQL queries-- Addressed front-end and back-end issues- Led the team's transition to Git, resulting in fewer work interruptions due to connectivity issues and an increase in development productivity Show less

Master, Algorithms And Data Structures

Tecnico, Informatics