Leonardo D.
Full-stack Product Engineer

Skills

Node.js

Cascading Style Sheets

Javascript

Html

Postgresql

Mongodb

React

React Native

Mysql

Bootstrap

Apollo Graphql

Leonardo is available for hire

Meet Leonardo D.

All Howdy Candidates are vetted for skills and english proficiency.

Bio

Specializing in transforming ideas into digital realities since 2018, this Front-end and Full-stack Developer excels in developing web and mobile solutions. With a focus on user experience and operational efficiency, extensive expertise encompasses the entire development process, from design conception to the implementation of complex systems.

Qualifications include mastery in Front-end and Full-stack Development, particularly in JavaScript, React, CSS, HTML, Vue, React Native, and TypeScript. Proficient in backend technologies such as Node.js, PHP, and GraphQL, and experienced in database management with PostgreSQL and MongoDB utilizing tools like Prisma and Express. Capabilities extend to frameworks including Next.js, CodeIgniter, jQuery, and Laravel. Additionally, adept in project management, requirement analysis, and system design.

Front End Developer | React | Node | Typescript | PostgreSQL
4/1/2023 - 12/1/2023

Successfully initiated and led a comprehensive project aimed at integrating logistics management, inventory control, customer relationship management (CRM), and sales functionalities. Developed the architecture and design of a complex system that seamlessly harmonized these business aspects in an integrated and efficient manner. Overcame challenges related to the integration of various business functions by creating a cohesive system that was agile and capable of facilitating critical business processes. Ensured ongoing maintenance and evolution of the system to adapt to changes in both business and market needs.

Utilized technical expertise in Node.js and Express for the backend development, ensuring robust and scalable server-side operations. Leveraged Next.js and React for creating responsive and dynamic front-end interfaces, enhancing user experience and engagement. Employed PostgreSQL for reliable and efficient database management, ensuring data integrity and performance. Incorporated TypeScript for type safety and enhanced code quality. Maintained codebase integrity and supported collaborative development through GIT version control.
Front End Developer | React | Node | PHP | CodeIgniter
3/1/2023 - Present

A significant contributor to the development of online customization tools, CRM systems, and solutions for administration and inventory control in e-commerce projects. Leveraged a variety of technologies to build complex and tailored systems that meet the specific needs of e-commerce environments, enhancing both the online shopping experience and the operational efficiency of underlying systems. Demonstrated technical expertise in React, Next.js, and React Native to create responsive and user-friendly interfaces. Utilized MariaDB and MongoDB for effective database management, ensuring data integrity and accessibility. Integrated legacy systems using jQuery and developed server-side solutions using Node.js and PHP with the CodeIgniter framework. Adopted TypeScript to enhance code reliability and maintainability. Maintained collaborative code repositories with GIT, ensuring version control and seamless collaboration across development teams. Engaged in all phases of the development lifecycle, from initial requirements analysis through to continuous process optimization, ensuring the delivery of intuitive and efficient solutions for end users.
Front End Developer | React | Vue | Laravel | PHP
10/1/2022 - 2/1/2023

Led advanced projects in product management, white-label solutions, and administration systems, focusing on the migration and modernization of legacy projects. Delivered contemporary, robust, and efficient platforms by leveraging extensive technical expertise. Addressed the complexity of updating obsolete systems, ensuring improved efficiency and adaptability of new solutions while maintaining the longevity and effectiveness of developed platforms.

Demonstrated proficiency in front-end technologies, including React, Next, and Vue, as well as back-end development using Node, TypeScript, PHP, and Laravel. Achieved scalability and adaptability through meticulous architectural planning and execution. Utilized MySQL for database management and implemented comprehensive version control practices with GIT and SVN. Effectively led and coordinated a team through technology transformations, ensuring the seamless integration of various tools and frameworks.
Front End Developer | React | Node | Typescript
3/1/2022 - 9/1/2022

Successfully contributed to the development of a comprehensive portal designed for managing services and scheduling healthcare professionals. Created a robust, intuitive platform tailored to the dynamic needs of a hospital environment, ensuring both usability and efficiency. Overcame the challenge of developing an efficient and adaptable system architecture suited for complex hospital operations. Implemented and optimized new modules to enhance service management and scheduling. Leveraged advanced technologies such as React for front-end development, React Native for mobile applications, and Node and TypeScript for back-end services. Demonstrated proficiency in database management using MongoDB and PostgreSQL, ensuring reliable data storage and retrieval. Maintained collaborative codebases and version control through Git, ensuring smooth integration and deployment processes.
Front End Developer | React | Node | GraphQL | Full Stack
9/1/2021 - 1/1/2022

Played a critical role in the maintenance and continuous enhancement of a distance learning system. Successfully implemented new modules aimed at efficient content and class management to cater to the evolving needs of online education. Ensured stability and effectiveness of the learning platform while seamlessly introducing new functionalities, thereby supporting diverse learning styles and varied content through an intuitive interface. Managed technical complexities by integrating cutting-edge technologies to ensure a smooth and efficient user experience. Developed technical expertise in the use of React, React Native, and GraphQL for front-end development. Demonstrated robust back-end development skills using MongoDB, PostgreSQL, and Node.js. Ensured collaborative and consistent code maintenance practices using Git.
Front End Developer | React | Vue | PHP | CodeIgniter
3/1/2021 - 9/1/2021

Developed customizable and scalable platforms tailored for white-label financial solutions. Addressed the unique requirements of the financial sector by implementing highly adaptable and robust systems, ensuring flexibility and scalability. Designed and implemented intuitive user interfaces to enhance the user experience, optimizing the offering of customized financial services for clients' end users.

Gained extensive expertise in HTML, CSS, and JavaScript, utilizing jQuery to enhance interactivity. Utilized front-end frameworks such as Bootstrap and Materialize to create responsive designs. Employed React and Vue.js for building dynamic and component-based user interfaces, enhancing the performance and maintainability of web applications.

On the back-end, leveraged Node.js for server-side development, alongside PHP frameworks such as CodeIgniter and Laravel to develop robust and scalable web applications. Managed version control and collaborative development through the use of GIT. Developed and maintained efficient databases using SQL, ensuring data integrity and optimized performance for applications.

Through this role, honed the ability to integrate a variety of front-end and back-end technologies, creating comprehensive and efficient systems. Ensured platforms were user-friendly and highly efficient, meeting the needs of clients offering financial services.
Front End Developer | React | PHP | CodeIgniter | jQuery
3/1/2020 - 3/1/2021

Successfully advanced from intern to integral team member, demonstrating the ability to swiftly learn and implement new technologies within a fast-paced work environment. Effectively contributed to multiple projects with a particular focus on e-commerce and online customization tools, ensuring robust integration with various CRM and inventory management systems. Leveraged technical expertise to maintain seamless operations both as an in-house developer and as a freelancer, managing time and responsibilities efficiently.

Developed and enhanced proficiency in fundamental web development technologies including HTML, CSS, JavaScript, and jQuery, enabling the creation of dynamic and interactive user interfaces. Applied advanced PHP skills within the CodeIgniter framework to develop scalable and secure backend systems. Employed MySQL and MariaDB for database management, ensuring data integrity and optimized querying.

Utilized Bootstrap for responsive UI design, contributing to user-friendly web applications. Implemented version control using GIT, facilitating collaborative work and streamlined code maintenance. Expanded technical toolkit to include Node.js, enhancing backend performance and application speed for real-time data processing needs.

Pursued continuous professional development and remained current with industry practices, reinforcing the ability to deliver high-quality freelance work post-transition from full-time employment.
Front End Developer | Full Stack | PHP | JavaScript
2/1/2018 - 2/1/2020

Demonstrated proficiency in building a solid foundation in programming and web design, focusing on developing customized websites and systems tailored to client demands. Navigated the initial steps of a freelance programming career by adeptly adapting to varied client needs and mastering a broad range of technologies and programming languages. Utilized HTML, CSS, and JavaScript to create responsive and interactive web pages, often integrating jQuery for enhanced functionality. Leveraged PHP for server-side programming and implemented MySQL for efficient database management. Employed Bootstrap to expedite the design and development process, ensuring mobile-friendly and visually appealing interfaces. Ensured version control and collaborative development through the use of GIT. Developed a comprehensive understanding of web development technologies and frameworks to deliver efficient and innovative solutions to clients.