- Architected a scalable backend system using NodeJS and NestJS, handling thousands of requests per minute with a 91.0% success rate, which enhanced overall system performance and support.- Led the redesign and implementation of a core microservices architecture with NodeJS and NestJS, reducing server response times by 40% and improving data throughput by 35%, resulting in a 20% increase in application efficiency.- Developed and optimized enterprise-level applications using TypeScript, improving code efficiency by 60% and reducing development time by 25% through streamlined coding practices and robust automated testing using Jest.- Engineered complex backend solutions with TypeScript, LLM (OpenAI, Gemini), leading to a 35% increase in code performance and a 40% reduction in system errors, which enhanced user experience and boosted customer satisfaction ratings by 25%.- Mentored a team of 2 junior developers, providing weekly code reviews, which improved their coding proficiency by 30% and reduced their bug rate by 40% within six months.- Led a series of technical workshops on best practices in NodeJS and TypeScript, increasing team knowledge and confidence in these technologies, which resulted in a 46% improvement in project delivery times and a 25% reduction in code errors.

- Coached mid-level developers on advanced debugging and optimization techniques, which enhanced their problem-solving skills and reduced critical system bugs by 70%, leading to a 20% increase in system uptime and improved user experience.- Developed and maintained a dynamic web application using NodeJS and React, which enhanced user engagement by 25% and reduced bounce rates by 20%, resulting in a 15% increase in overall user retention.- Designed and implemented Docker-based microservices architecture, streamlining application deployment and reducing deployment times by 60%, which increased system reliability and scalability.- Automated CI/CD pipelines using Github and AWS Code Pipeline, reducing integration and deployment times by 70% and enhancing code quality, resulting in a 40% increase in development team productivity and faster release cycles.- Optimized cloud resource utilization on AWS, reducing operational costs by 15% and improving system performance, which supported a growing user base of over 100.000 users.- Coordinated the integration of third-party APIs with multiple teams, ensuring compatibility and resolving conflicts, which improved system interoperability and reduced downtime by 40%, enhancing overall system reliability.

- Engineered a robust API architecture using CQRS and DDD principles, which enhanced data integrity and increased system scalability by 40%, supporting seamless integration with multiple services and ensuring consistent performance under heavy load.- Integrated RabbitMQ for asynchronous messaging in API workflows, improving request handling efficiency by 35% and reducing response times by 25%, which enhanced user experience and system reliability.- Developed and executed comprehensive unit tests using Jest, increasing test coverage by 90% and reducing bugs in production by 75%, which significantly improved overall software quality.- Facilitated cross-functional collaboration between the development, design, and marketing teams to successfully launch a new product feature, which resulted in a 25% increase in user engagement and 15% growth in customer acquisition within three months.- Integrated Google Spreadsheets with the internal API, automating data synchronization between the finance and operations teams, which reduced manual data entry errors by 85% and saved 20 hours of work per month and $588 annual cost savings for the company.

- Collaborated with product managers and stakeholders to prioritize and define technical requirements, ensuring that development efforts were aligned with business objectives, which improved project scope clarity and reduced feature creep by 35%.- Led a comprehensive refactoring project using Clean Architecture principles, reducing code complexity and eliminating 37% of code smells, which enhanced maintainability and accelerated feature development by 25%.- Used many AWS services like (Code Build, Code Pipeline, ECS, EC2, S3, SQS, SNS, and DynamoDB) to ensure availability and scalability resulting in 30% more engagement of final users.

-Built and maintained responsive web applications using NodeJS, React and Python, improving user engagement by 25%, resulting in a 20% increase in user retention and positive user feedback.- Spearheaded the refactoring of legacy backend code to NodeJS and ExpressJS, decreasing codebase complexity by 40%, removing 37% of code smells and honey spots, and enhancing maintainability, which led to a 25% faster feature rollout and improved developer productivity.- Developed and executed comprehensive unit and integration tests using Jest and other testing frameworks, increasing test coverage by 90% and reducing bugs in production by 75%, which improved overall software quality and user satisfaction.

• Development of new features.• Maintenance of existing code.• Development Backend of micro-services with NodeJS.• DevelopmentFrontend with ReactJS e AngularJS