Baltazar P.

Front-end UX Engineer

Front-end
6/1/2022 - Present

Led the development of micro frontends for a large-scale multi-brand application. Gained expertise in breaking down monolithic architectures into independently deployable micro frontends, utilizing frameworks such as React, Angular, and Vue.js. Mastered the use of Webpack Module Federation and SystemJS for the integration and lazy loading of micro frontend components. Employed Node.js for server-side operations and API integrations. Implemented state management solutions using Redux and Context API, ensuring efficient and scalable state handling. Utilized Docker and Kubernetes for containerization and orchestration, promoting seamless deployment across environments. Applied continuous integration and continuous deployment (CI/CD) practices using Jenkins and GitLab CI, ensuring streamlined code deployment and version control through Git. Enhanced application performance through rigorous testing with Jest and testing-library, and optimized user experience using performance monitoring tools like New Relic and Google Lighthouse.

Frontend/UI Developer
2/1/2022 - 6/1/2022

Developed interfaces for projects to launch decentralized and interoperable token pools and auctions. Enabled backers to secure early access to cryptocurrency innovations. Gained proficiency in blockchain technologies and smart contract development. Utilized frameworks such as React and Angular for front-end development, and Node.js for backend services. Employed Ethereum and Solidity for the creation of decentralized applications (dApps), and Truffle Suite for smart contract testing and deployment. Leveraged Web3.js and Ethers.js for blockchain integration. Ensured robust security measures and implemented secure coding practices. Used tools like Git for version control and Jira for project management. Enhanced collaboration through agile methodologies and participated in code reviews to maintain high code quality.

Frontend Developer
10/1/2021 - 2/1/2022

Gained extensive experience in the development and maintenance of web applications using React and Next.js. Enhanced technical expertise in building dynamic, high-performance user interfaces. Utilized state management libraries such as Redux and Context API to manage complex application state. Implemented server-side rendering and static site generation features to improve application speed and SEO. Skilled in using modern JavaScript (ES6+) and TypeScript to write clean and maintainable code. Integrated RESTful APIs and GraphQL endpoints to seamlessly connect front-end applications with back-end services. Employed CSS-in-JS libraries like Styled Components and Emotion to create component-based, reusable styles. Ensured robust application performance and quality through techniques such as code splitting, lazy loading, and Webpack optimizations. Conducted unit testing and end-to-end testing using Jest and Cypress to ensure code reliability and functionality. Implemented continuous integration and continuous deployment (CI/CD) practices using tools like Jenkins and GitHub Actions for streamlined and automated deployment pipelines. Utilized tools like ESLint and Prettier to maintain code consistency and adhere to best practices. Collaborated efficiently with cross-functional teams, leveraging Agile methodologies and tools like Jira and Trello.

Frontend Developer
11/1/2020 - 10/1/2021

Gained expertise in developing comprehensive web solutions leveraging the React ecosystem and implementing Micro Frontends architecture. Acquired advanced skills in JavaScript, specifically focusing on React components, hooks, and lifecycle methods. Utilized state management libraries such as Redux and Context API to effectively manage and maintain application states. Developed proficiency in integrating various third-party libraries and APIs to enhance functionality and user experience. Employed modern front-end build tools and task runners, including Webpack and Babel, to optimize and streamline the development process. Engaged in continuous integration and continuous delivery (CI/CD) practices using tools such as Jenkins, CircleCI, or GitHub Actions, ensuring effective deployment pipelines. Maintained high code quality and facilitated team collaboration through the use of Git for version control. Leveraged containerization tools like Docker to manage Micro Frontend services, ensuring scalability and ease of maintenance. Demonstrated the ability to design and implement responsive and user-friendly interfaces, adhering to web accessibility standards and best practices.

Frontend Developer
12/1/2019 - 3/1/2020

Gained expertise in developing and maintaining web applications using React and Gatsby. Acquired in-depth knowledge of JavaScript and modern ES6+ features. Employed state management using Redux and Context API, and demonstrated proficiency in creating and maintaining responsive design practices utilizing CSS-in-JS, Styled Components, and Sass. Extensive experience in optimizing web performance and implementing best practices for SEO in the context of static site generation with Gatsby. Utilized GraphQL for querying data and integrated various APIs to enhance application functionality. Conducted thorough code reviews and maintained code quality through unit and integration testing using Jest and React Testing Library. Facilitated continuous integration and deployment pipelines with tools such as Travis CI, CircleCI, and Netlify. Ensured version control and collaborative development through the use of Git and GitHub.

Frontend Developer
10/1/2019 - 10/1/2020

Specialized in the development and maintenance of web applications leveraging React and Next.js. Achieved significant expertise in creating high-performance, scalable web applications with a focus on seamless user experiences. Utilized state management libraries such as Redux for efficient data handling and synchronous UI updates. Demonstrated capability in optimizing frontend performance and implementing Server-Side Rendering (SSR) with Next.js to improve application load times and SEO. Played a key role in developing and maintaining complex component libraries to ensure reusability and consistency across applications. Employed modern JavaScript (ES6+) practices and tools like Webpack and Babel to streamline build processes and enhance code quality. Conducted thorough code reviews to maintain high coding standards and collaborated using Git for version control. Integrated backend services and REST APIs effectively, providing a holistic approach to web application development. Leveraged testing frameworks such as Jest and Enzyme to ensure robust and reliable application functionality.

JavaScript Developer
3/1/2019 - 10/1/2019

Developed and maintained high-performance scalable crawlers using Node.js/Puppeteer and Go. Spearheaded the architecture and implementation of web scraping solutions that processed vast amounts of data efficiently. Leveraged the concurrency capabilities of Go to enhance the speed and reliability of the crawling processes. Utilized Puppeteer for headless browser automation to extract dynamic content. Ensured robustness and scalability of the crawlers, facilitating the seamless collection of critical data from various web sources. Conducted rigorous testing and optimization to enhance the performance and accuracy of the crawlers.

Frontend Developer
8/1/2017 - 2/1/2019

Engineered and maintained a social network supporting nearly 16 million users, showcasing proficiency in PHP and MySQL. Leveraged the Laravel framework for backend development, ensuring scalable and efficient system architecture. Developed front-end features using JavaScript, jQuery, and Vue.js, enhancing user experience. Implemented RESTful APIs for seamless integration with mobile applications. Utilized AWS for cloud hosting and scaling, optimizing performance and resource management. Ensured high code quality and collaboration through Git for version control. Actively engaged in performance tuning, database optimization, and load balancing to handle high traffic loads. Conducted regular security audits and implemented measures to protect user data, demonstrating expertise in cybersecurity practices and protocols.

Web Project Manager
6/1/2015 - 5/1/2017

Specialized in monitoring and enhancing product development processes with a focus on speed, quality, team spirit, and engagement. Identified obstacles within the product development lifecycle by collaborating closely with the team to streamline workflows. Facilitated effective lines of communication, ensuring all team members were aligned and informed throughout project stages.

Web Computing at Paula Souza Center
2013 - 2014

EFSET English Certificate 75/100 (C2 Proficient) at EF Standard English Test (EF SET)
1/1/2022