Developed a secure authentication system using JWT-based sessions and hashed passwords, employing Node.js, Express, PostgreSQL, and Prisma for a client in US-NY. Integrated transactional email services via SendGrid for sending user registration approval/rejection notifications and notifying multiple business events.

Developed and implemented new backend features for a Fleet Management System (FMS) used across Latin America using TypeScript, Node.js, and MongoDB. Created web services for API and client system integration, developed RESTful API integrations with GPS platforms, optimized data ingestion pipelines in MongoDB, applied AWS cloud and serverless solutions including Lambda, Cognito, CloudWatch, Event Bridge, and S3, managed infrastructure and deployments with AWS SAM and CircleCI, and participated in agile sprint planning and issue resolution using Jira.

Developed and maintained backend functionalities for a SaaS fleet management system (FMS) used in several Latin American countries. Implemented REST APIs and asynchronous services using Node.js, TypeScript, and MongoDB for client system integration, enabling the management and synchronization of orders and loads within the FMS. Created pipelines and processed data, using advanced queries, indexes, and aggregations in MongoDB for queries, reports, JSON files, dashboards, and analytics. Integrated GPS providers, ensuring the centralization of geolocation data of client transport units within the FMS. Implemented event-driven architectures by creating microservices, AWS Lambda, and Event Bridge for decoupled communication. Developed a geospatial dashboard with interactive maps using Kepler, Python, and Pandas to visualize frequent routes and stopping points. Managed cloud infrastructure and deployments using AWS SAM, CloudFormation, S3, AWS SDK, RDS, CloudWatch, AWS API Gateway, IAM Roles, and CI/CD with CircleCI. Used Git and Bitbucket for project code version control. Actively participated in sprint planning, incident resolution, process estimation, and performance optimization under Scrum methodology and Jira for agile task management.

Developed and designed custom web applications for various business models including legal consortiums, parcel services, online delivery, and supermarkets using TypeScript, Node.js, Express, and React.js. Created RESTful APIs with Node.js and Express.js following best practices and design patterns. Designed and implemented MySQL and PostgreSQL databases. Implemented Swagger for API documentation to facilitate integration and understanding by developers and end users.

Developed custom web applications with React.js and Vue.js for different business models (logistics, legal services, delivery, retail). Implemented RESTful APIs with Node.js and Express.js, along with good programming practices and design patterns, facilitating integration with web and mobile applications. Modeled and managed relational databases using MySQL and PostgreSQL, including indexes, stored procedures, and complex queries. Documented services using Swagger, improving API comprehension and consumption. Worked directly with clients for requirements gathering and technical solution proposals.

Developed and designed the administrative web portal using Laravel and Vue.js to simplify online order management. Created APIs to support mobile app functionalities including order, user, and commerce management. Developed payment gateway modules for credit card and QR payments integrating Cybersource and Banco Económico APIs. Implemented push notification management using Firebase. Developed real-time tracking module with Firestore for delivery personnel geolocation. Managed MySQL database with indexes, stored procedures, and complex queries to analyze trends and optimize data retrieval.

Developed the web administrative portal using Laravel and Vue.js for the management of orders, users, delivery drivers, routes, geofences, merchants, and other important modules. Built backend APIs using RESTful for integration with the mobile application made in Flutter for order, user, and business management. Implemented online payment gateways, including credit card tokenization with Cybersource and QR payments through local banking APIs - Banco Económico (Bolivia). Developed a real-time tracking module for delivery drivers using Firestore (NoSQL) and GPS geolocation to improve operational efficiency, which increased by 40%. Administered and optimized MySQL databases, creating indexes and complex queries for data analysis (best-selling products, popular businesses). Implemented a system for mass push notifications via Firebase for promotions and order statuses.

Provided technical support to resolve IT issues, assisted staff, and ensured optimal system operation. Configured operating systems, Mikrotik routers, and Windows Server 2008 and 2012 to maintain a secure and efficient network environment.