Hadi Jafari Email and Phone Number

- Designed and implemented a centralized observability solution for logs, metrics, and tracing using Otel-Collector, Prometheus, Tempo, Loki, and Grafana. Integrated an ERP microservice solution with full OpenTelemetry support via the OpenTelemetry Golang API. Developed troubleshooting and analytics dashboards in Grafana, significantly enhancing visibility. Centralized the management of logs, metrics, and traces , enabling long-term data retention and improving system monitoring and troubleshooting from scratch- Implemented safe application update and migration automation using Golang, the Kubernetes API, Helm charts, and the CSI Snapshot API, reducing data corruption risk and application downtime during updates enhancing system reliability and minimizing disruptions.-Implemented Point-in-Time Recovery (PITR) backup and restore solution for PostgreSQL over S3 storage, enabling the restoration of individual tenants to specific points in time. This solution enhanced data recovery flexibility and improved system resilience by minimizing data loss during outages.

- Developed a custom query builder front-end using Angular, integrated with a back-end system to generate parametric reports and aggregations across different entities, enabling dynamic data analysis and enhancing reporting capabilities.- Implemented an optimized report printing solution using Angular and Web Workers, streamlining PDF and Excel report design for dynamic reports. Successfully reduced report export design time, significantly improving efficiency and resource utilization.- Developed a cheque management system using Golang, state machines, and PostgreSQL to manage various cheque states and ensure synchronization of bank accounts with cheque amounts, enhancing financial accuracy and operational efficiency.- Maintained and managed front-end component package and infrastructure used by developers to streamline product development, ensuring consistent and efficient front-end implementation across the team.

- Developed a gym management system and integrated software with hardware using Python, PostgreSQL, and Raspberry Pi, successfully operating across 6 gyms and managing 15,000+ users, automating processes and improving operational efficiency.- Developed a student plan management system using React.js and Django, enabling parent and teacher reviews to improve the study process for over 4,000 students, enhancing academic monitoring and collaboration.-Developed an online test solution with a question bank and automated test generation based on user data using React and Django, streamlining the testing process and improving user-specific assessments.