Igor Jovanovic

● Engineered end-to-end solutions for a modern property management system, contributing both frontend (React, Micro Frontends) and backend (Node.js, Nest.js, Typescript, Microservices) development ● Implemented Zustand for state management in a Micro Frontend architecture, using Context API and TanStack Query to optimize data flow, fetching, and caching for improved performance. ● Collaborated closely with design teams using Figma to create pixel-perfect UI components, styled with Tailwind CSS, and ensured design consistency with Storybook. ● Wrote thorough frontend tests using Jest and React Testing Library to maintain UI reliability and prevent regressions. ● Architected scalable microservices using Node.js and NestJS, supporting complex business logic. ● Designed and built a suite of serverless APIs using TypeScript and AWS Lambda, handling high-throughput internal tools with low latency. ● Integrated frontend applications with RESTful, GraphQL, and gRPC APIs to enable efficient communication with microservices. ● Implemented secure authentication using OAuth 2.0 and SSO (Okta), with role-based access control (RBAC) managed via JWTs and custom middleware. ● Enhanced database performance with PostgreSQL via optimized indexing and efficient schema design. ● Used Redis for both frontend session management and backend caching to reduce latency and increase throughput. ● Implemented asynchronous processing with Celery, RabbitMQ, and Kafka, enabling real-time backend events and frontend notifications. ● Monitored and visualized system performance using Prometheus and Grafana, proactively identifying issues in both UI and backend services. ● Deployed containerized services with Docker and Kubernetes on AWS EKS, ensuring high availability and easy scalability. ● Managed infrastructure using AWS (Lambda, SageMaker, CloudWatch, API Gateway) to support backend features and fast, scalable APIs.

● Built user-facing admin and dashboard interfaces with React and Next.js, incorporating server-side rendering (SSR) and integrating tightly with OAuth-protected APIs. ● Leveraged Redux, Vuex for state management, React Router, Vue Router for routing, and Axios for efficient API communication, improving application scalability, performance, and data handling. ● Developed and maintained scalable backend services using Node.js and Express, ensuring efficient API performance and robust microservices architecture. ● Integrated front-end applications with REST and GraphQL APIs to support real-time interactions and seamless data visualization. ● Architected and implemented efficient data storage solutions using PostgreSQL and MongoDB, optimized for high-volume transactions and complex querying. ● Containerized applications using Docker and deployed them via Kubernetes, ensuring high availability and effortless scaling across multiple cloud platforms. ● Led the creation of CI/CD pipelines using GitLab and GitHub Actions to automate testing, building, and deployment across cloud providers such as Azure and Google Cloud.

● Built responsive web pages using HTML, CSS, and Bootstrap, and Angular to enhance user experience. ● Developed interactive web components with JavaScript and jQuery, improving functionality. ● Implemented AJAX for seamless data retrieval and dynamic content updates. ● Designed and managed relational databases using SQL for efficient data storage and retrieval. ● Created server-side scripts with PHP to handle form processing and database interactions. ● Practiced version control and collaboration using Git for code management.