Alexander Atilio Acosta Leon

J AVA S C R I P T B A C K - E N D D E V E L O P E R ALEXANDER ATILIO ACOSTA LEON C O N TA C T I N F O R M AT I O N-Armenia, Colombia - Oct 16, 1991 EXPERIENCE NODE.JS BACK-END DEVLOPER Worknaut. Medellin, Colombia | Apr 2023 - Present · Incorporated a secure authentication system utilizing JWT tokens, enhancing user privacy and strengthening system access controls. · Implemented measures to eliminate floating-point precision errors, guaranteeing flawless accuracy in financial records and calculations. https://www.linkedin.com/in/alexande raleon-/ · Implemented a versatile pagination system that can be effortlessly utilized across various endpoints, providing efficient data navigation capabilities. · Applied unit testing to all developed features, ensuring robust functionality and reliable performance. SKILLS NODE.JS BACK-END DEVELOPER Emplicit. San Diego, California, USA | Apr 2022 - Feb 2023 PostgreSQL JavaScript MongoDB Mongoose Sequelize TypeScript · Developed an in-app feature enabling users to access the bill of lading, streamlining 100% of operations, enhancing efficiency. · Boosted the algorithm's search speed for alert messages by nearly 75% · Established a brand analytics dashboard, empowering users to make informed decisions. · Implemented the ability to dynamically create custom attributes for products. Unit testing Node.js MySQL NODE.JS BACK-END DEVELOPER ReferHub. Seattle, Washington, USA | Jun 2020 - Apr 2022 LANGUAGES Spanish | Native English | Advanced · Successfully migrated data from MongoDB to PostgreSQL and refactored the codebase to incorporate a PostgreSQL-compatible ORM. · Developed a file-upload-enabled chat application, empowering users to exchange messages and share files. · Integrated Stripe to enable seamless subscription management and secure money transfers, ensuring efficient payment processing. PROFESSIONAL SUMMARY Collaborative back-end developer with over 3 years of professional experience, specializing in web application working with Node.js and NestJS framework. Throughout my career, I have applied agile principles to drive successful project outcomes. I possess expertise in managing databases, leveraging Sequelize and Mongoose for PostgreSQL and MongoDB, respectively. With a track record of working on international projects and collaborating with diverse stakeholders, I consistently deliver high-quality solutions