Damir Costic

Designed and developed scalable, production-grade applications using Node.js, TypeScript, and NestJS Built complex front-end systems with React and Next.js, focusing on performance and usability Architected and maintained microservices handling large-scale data processing workflows Developed secure REST APIs and integrated third-party services (authentication, payments, data pipelines) Implemented real-time communication using WebSockets for live system updates Containerized services with Docker.

Developed and maintained scalable web applications using Vue.js, PHP, and Node.js Designed and optimized RESTful APIs for high-traffic platforms Improved application performance through efficient database design and query optimization Built reusable and modular UI components to ensure consistency across applications Implemented state management and frontend architecture best practices Collaborated with cross-functional Scrum teams to deliver features on time

Developed web applications using JavaScript, Angular, and backend services with Node.js and .NET Built and consumed RESTful APIs for internal and external system integrations Worked with SQL Server and Entity Framework for data management and optimization Created responsive UI components using Bootstrap and ensured cross-browser compatibility Implemented unit and integration tests to improve application stability Assisted in debugging, troubleshooting, and performance tuning

Developed web applications using JavaScript, Angular, and backend services with Node.js and .NET Built and consumed RESTful APIs for internal and external system integrations Worked with SQL Server and Entity Framework for data management and optimization Created responsive UI components using Bootstrap and ensured cross-browser compatibility Implemented unit and integration tests to improve application stability Assisted in debugging, troubleshooting, and performance tuning