Josue Andre Da Silva Barros Email & Phone Number

State Of Rio De Janeiro, Brazil

Cabo Frio, Rio De Janeiro, Brasil

As a solo developer, I focus on creating scalable, efficient, and innovative applications that solve real-world problems. Our expertise covers a range of services, including:- Web Application Development: Building high-performance, scalable web applications using Golang and ReactJS, focusing on clean architecture and seamless user experiences.- API Development & Integration: Leveraging Golang to create robust APIs that enhance system connectivity and enable smooth integrations with third-party services.- Custom Software Solutions: Developing tailored Golang/React solutions to meet specific business challenges, ensuring scalability and efficiency.- Real-Time Applications: Crafting high-performance real-time applications using Golang for industries like finance, logistics, and e-commerce.- E-commerce Platforms: Designing secure and scalable e-commerce platforms built with Golang, optimized for performance and growth.- Mobile Application Backends: Building scalable backends for iOS and Android mobile applications using Golang, ensuring high availability and performance.As the Founder and Senior Software Engineer, I lead complex projects end-to-end, overseeing every phase from concept to deployment while ensuring high-quality code, robust architecture, and exceptional performance. My primary focus areas include:1. E-commerce Platform Development: Designed and implemented a multi-vendor e-commerce platform using Golang with real-time product inventory, payment gateways, and order tracking.2. Real-Time Car Tracking System: Developed a GPS-based real-time vehicle tracking application using Golang, capable of handling live location updates and managing fleet data.3. Video Encoding System: Created a video encoding and streaming system using Golang to handle large video uploads, real-time encoding, and efficient streaming services.

Nova York, Estados Unidos

Responsibilities:• Focus on promptly addressing production bugs, enhancing system stability for a major freelancing platform.• Elevate code quality and readability, aligning with SonarQube standards to ensure maintainability.• Rectify flaky unit tests, supplementing the test suite with additional checks for reliability and robustness.• Contribute to the expansion of the platform by developing new modules based on client requirements.Key Activities:• Analyze and resolve complex production issues, minimizing downtime and user impact.• Refactor and improve existing codebases for clarity, employing best practices for Java development.• Enforce coding standards via SonarQube, achieving superior grades in code health metrics.• Strengthen testing procedures by fixing and augmenting unit tests with JUnit, ensuring fail-safe operations.• Engage in continuous integration and delivery with Maven, facilitating a seamless workflow.• Work collaboratively with the team to integrate new features, meeting client demands with agility.Impact & Professional Growth:• Significantly reduced bug incidence in production by 20%, boosting platform reliability.• Greatly increased code coverage, reinforcing the test suite's efficacy and fail-safety.• Directly contributed to the launch of 3 major modules, enhancing the platform's functionality and user satisfaction.

Delaware, Estados Unidos

Responsibilities:• Led the development and launch of a Virtual Golf reservation and scoring website, enhancing the user experience for golf enthusiasts.• Spearheaded the frontend development of a scalable E-commerce platform designed for a diverse set of products.• Collaborated with cross-functional teams to refine website architecture, resulting in a robust platform capable of handling high traffic and complex transactions.• Integrated RESTful APIs to connect the frontend with backend services, improving data retrieval and server communication.• Employed Styled-components to maintain a consistent style across the platforms while allowing for component-level customizations.• Maintained version control and collaborative development using Git, facilitating team contributions and codebase management.• Developed custom functionalities to meet client specifications, including interactive product galleries and real-time reservation systems.• Addressed performance optimization and implemented best practices to minimize page load times and enhance the user experience.• Provided maintenance and updates to the platforms post-launch, ensuring continued performance and relevance.Achievements:• Successfully delivered multiple frontend projects with varying complexities under strict deadlines, contributing to a 20% increase in user engagement for clients.• Optimized E-commerce website performance, which led to a 15% reduction in bounce rates and a significant improvement in customer retention.Skills Developed:• Proficiency in React.js for building dynamic user interfaces.• Advanced use of JavaScript and TypeScript for high-quality frontend code.• Deep understanding of responsive design and cross-platform compatibility.• Expertise in Styled-components for modular and reusable CSS in JS.• Practical experience in Node.js and Express.js for backend API integration.• Mastery in version control using Git.

Tech Stack: ReactJS, TypeScript, Redux, Jest, React Testing Library.● Worked on a variety of projects, including complex admin panels, business intelligenceapplications, and real estate applications.● Utilized ReactJS to build responsive and dynamic user interfaces, converting Figmaand Adobe XD layouts into code.● Employed TypeScript to enhance code reliability and maintainability, reducing thelikelihood of runtime errors.● Utilized MaterialUI to design and implement consistent and visually appealing userinterfaces across projects.● Integrated Redux to manage complex state management across components andfacilitate data exchange between front-end and back-end systems.● Performed back-end work using NodeJS frameworks, including Nest and ExpressJS,to develop RESTful APIs and manage data access and storage.

Uberlândia, Minas Gerais, Brasil

Tech Stack: Java (JSF, Spring JDBC, Spring Rest), ReactJS.● Developed and maintained Java-based web applications using JSF and Spring JDBCframeworks.● Designed and implemented RESTful APIs using Spring Rest to enable data exchangebetween web applications and mobile devices.● Leveraged ReactJS to build a responsive, dynamic Single Page Application (SPA) thatwas later converted into iOS/Android web views.● Collaborated with cross-functional teams, including UX/UI designers and QA testers, toensure high-quality delivery of features and functionality.● Followed MVC architecture patterns, specifically Java Server Faces (MyFaces), toseparate application concerns and improve code maintainability.● Conducted code reviews and performed unit testing to ensure that the code waswell-written and adhered to best practices.

São Paulo, Brasil

Tech Stack: ReactJS, NodeJS (NestJS), PostgreSQL, Docker.● Developed features and contributed to a government project aimed at supportingentrepreneurs using ReactJS and NodeJS (NestJS).● Worked with a PostgreSQL database to manage data and handle transactions for theproject.● Utilized Docker to facilitate the deployment of the project in various environments andensure consistency in the deployment process.● Followed SCRUM methodologies to collaborate with team members, plan and executesprints, and deliver project milestones.● Leveraged Context API to manage authentication on the front-end, ensuring secureaccess to user data and resources.● Implemented JWT-based authentication on the back-end, allowing secure and reliablecommunication between the front-end and back-end of the project.

Rio De Janeiro, Brasil

As a Freelance FullStack Developer, I worked on a diverse range of projects, including websites, MVPs, blogs, and automation solutions. Collaborating closely with clients, I gathered requirements and delivered custom-built applications tailored to their business needs. My experience spans various technologies, with a strong focus on backend development.Key contributions:Designed and developed RESTful APIs and integrated third-party APIs, primarily using Golang, NodeJS, and Django.Built dynamic and responsive web applications using ReactJS and Spring.Developed cross-platform mobile applications using React Native.Implemented and optimized database schemas and data models using SQL and ORM frameworks such as GORM, TypeORM, Prisma and Sequelize.Ensured application performance, scalability, and security by conducting extensive testing and adhering to industry best practices.