Jefferson S.Front-end UX Engineer
Skills
A professional with a degree in Systems Analysis and Development from Universidade Paulista, recognized for a dynamic and goal-oriented approach. With a strong passion for technology, education, and transforming lives through programming, there is a steadfast commitment to Lifelong Learning, driven by a natural curiosity that aligns perfectly with the constantly evolving field of technology. Extensive experience as a developer encompasses various sectors, particularly e-commerce and marketplace, demonstrating proficiency across the entire development lifecycle, from initial requirement gathering to final production deployment.
Software Engineer
8/1/2022 - 3/1/2024
Responsible for front-end development of projects including Internet Banking, Open API, Dashboard Partners, Web-view for some mobile application flows, Design System, and the Back Office Portal. Developed new features, resolved bugs, and identified new requirements. Contributed to the architecture and style guide of projects, enhancing the design system and improving accessibility. Implemented responsive layouts, participated in code reviews, and conducted technical refinements. Participated in all Scrum ceremonies to ensure smooth project progression.
Gained proficiency in tools and technologies such as ReactJS, NextJS, JavaScript, TypeScript, Storybook, styled-components, Sass, Git, and GitLab. Utilized WireMock, NodeJS, Jira, Confluence, and Slack to streamline workflows and ensure collaboration. Adhered to Scrum methodologies for agile project management.Front-End Developer
1/1/2022 - 9/1/2022
As a Senior Front-end Developer on the multi-sites team, responsible for developing the e-commerce platforms Carters Brasil and FANLAB, key accomplishments include refactoring code and improving performance for Carters Brasil, and overseeing the complete development lifecycle of FANLAB from inception to production deployment. FANLAB serves as a marketplace for geek content under the Guararapes Riachuelo group.
Activities encompassed the development of new features and enhancements, addressing and resolving bugs, the construction and improvement of Design System components, and conducting unit and end-to-end testing. Additional responsibilities involved implementing SEO and accessibility improvements, managing code versioning, performing code reviews, and contributing to technical refinement. Regular participation and interaction in Agile ceremonies ensured project alignment and progress.
Technical expertise developed includes proficiency with ReactJS, NextJS, JavaScript, and TypeScript. Testing skills were honed using Jest, react-testing-library, and CypressJS. Experience was gained in styling components with styled-components, fetching data using GraphQL with Apollo, and managing repositories with Git. Familiarity with cloud services extended to Microsoft Azure and AWS. Analytical capabilities were supported by Google Analytics, and project management was efficiently conducted using Kanban methodologies.Front-End Developer
1/1/2021 - 11/1/2023
Responsible for the development and architecture of projects using ReactJS, focusing initially on a white-label marketplace for loyalty programs. Contributed two years to the primary project, a loyalty marketplace, before transitioning to the Onboard team. This team specializes in initiating new projects and defining technologies and architecture for MVP development, subsequently transitioning these projects to other teams within the organization.
Development and enhancement of features, issue resolution, front-end architecture definition, and technology selection were key responsibilities. Played a critical role in creating a style guide and design system for front-end projects. Engaged in unit and end-to-end (E2E) testing, search engine optimization (SEO), and ensuring accessibility compliance. Identified new requirements and business rules, engaged in technical refinements, and performed code reviews. Actively participated in Agile ceremonies, contributing to collaborative and efficient project management.
Proficiency in ReactJS, NextJS, JavaScript, and TypeScript, with extensive use of Redux, styled-components, SASS, LESS, Ant Design, and Storybook. Skilled in utilizing Headless CMS, Jest, react-testing-library, and CypressJS for testing purposes. Leveraged Git for version control, integrated Google Analytics for performance tracking, and employed cloud services such as Microsoft Azure and AWS. Utilized Kanban for effective project management.FullStack Developer
9/1/2017 - 1/1/2021
Developed tools to enhance the performance of complex telecommunications networks for fixed and mobile operators across Brazil and Latin America. These tools enabled efficient collection and analysis of KPIs in telecom networks, facilitating technical analysis and software upgrade processes. Engaged in both front-end and back-end development of various tools and projects, ensuring robust database modeling and development. Responsibilities included gathering functional and non-functional requirements, bug fixing, and system improvements, as well as integrating systems for optimal functionality. Conducted data analysis on KPIs and participated in client meetings to ensure project alignment and success.
Demonstrated proficiency in PHP, JavaScript, NodeJS, ReactJS, JQuery, HTML, CSS, CSS-IN-JS, Bootstrap, and Material UI. Leveraged PostgreSQL, MySQL, and MongoDB for database management. Utilized Docker for containerization, and maintained collaborative code using Git and GitHub. Employed Grafana for monitoring and Helm for Kubernetes deployments, with infrastructure automation managed via Terraform. Worked within cloud environments including AWS, Google Cloud Platform, and Oracle Cloud, and operated on UNIX systems.
Systems Analyst at Paulista University
2019 - 2021Computer Science at ETEC Professor Camargo Aranha
2012 - 2014Information Technology at Rocketseat (React and React-Native Bootcamp)
2020 - 2021Front-end Development at Rocketseat (Javascript Bootcamp)
2021 - 2021Information Technology at IGTI (Node.js and React.js advanced)
2020 - 2020
SECTION 2 OF THE METEOR 101 COURSE at Meteor Software
7/1/2022Data Structures and Algorithms at Digital Innovation One Inc.
6/1/2022NextJS, GraphQL, Strapi, Jest, Cypress at Udemy
4/1/2022PWA, GatsbyJS, GraphQL, Markdown, Netlify CMS at Udemy
7/1/2021JavaScript Fundamentals at EW.IT
6/1/2021Scrum Foundation Professional Certificate (SFPC) at CertiProf
8/1/2020DEVOPS ESSENTIALS PROFESSIONAL CERTIFICATE (DEPC) at CertiProf
8/1/2020Programming Logic at Digital Innovation One Inc.
3/1/2020Foundations of System Architecture at Digital Innovation One Inc.
12/1/2019Introduction to Git and Version Control at Digital Innovation One Inc.
3/1/2019
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