Juraj Pusic

Led front-end development using React and Tailwind UI, improving development speed by 30%. Enhanced back-end Node.js functionality, cutting development time by 30% while maintaining consistency with team standards. Designed scalable data models and optimized SQL queries in BigQuery, boosting reporting speed by 35%. Consolidated APIs and database queries to improve performance by 40%. Scaled user authorization and notification systems using Redis, Scylla, and RabbitMQ, supporting over 100,000 users and managing a 150% user surge with AWS migration. Developed e-commerce components integrating Stripe, Coinbase, and Betray, increasing payment reliability by 50%. Established a comprehensive suite of automated tests reducing testing time by 40%. Managed project tasks with JIRA, increasing efficiency and ensuring timely project completion.

Achieved PCI DSS Level 1 compliance through SSL/TLS encryption and tokenization to secure sensitive data. Increased transaction capacity by 200% via optimized MongoDB queries with zero downtime. Improved user satisfaction by 30% through a responsive React interface with real-time updates. Reduced fraud by 40% using detection algorithms including velocity checks and device fingerprinting, integrating multiple payment processors. Built secure e-commerce checkout flows with 3D Secure and Stripe integration. Integrated generative AI into workflows, enhancing user engagement and personalization. Architected scalable cloud infrastructure on GCP and Azure, maintaining 99.9% uptime and supporting over 1 million monthly transactions.

Streamlined React integration with multiple UI libraries such as Ant Design and Tailwind CSS, improving usability and consistency. Utilized Redux Toolkit to reduce boilerplate by 60%, enhancing state management. Implemented React with TypeScript to decrease runtime errors by 30%. Integrated payment gateway Stripe and third-party APIs, enabling over 5,000 monthly online transactions. Improved RESTful API data handling by 35% using Node.js and Express.js. Established code quality and testing best practices with Jest and Cypress, increasing test coverage to 90% and reducing bugs by 40%. Contributed to Agile processes using JIRA, improving sprint goal achievement by 25%.