-Maintain and develop the production-ready SeaweedFS service on Hamravesh's PaaS platform. A new-generation storage service written in Golang that supports the S3 interface is called SeaweedFS. It has better performance than Minio in large-scale terabytes of storage consisting of small size objects. - Working on Scylladb as a distributed HA database for our service. I have also developed an async replication service to replicate to other S3 interfaces like Minio or AWS S3 with Prometheus metrics showing replication status on Grafana. - Metrics are scraped using ServiceMonitor on K8s and alerts can be defined in the manifests of Victoria Metrics. - Our storage can be provisioned as a multi-tenant service on the Hamravesh cluster with more than 100 nodes and more than 40 TB of data with the help of CDK8s and FastAPI.

- participate in several web based and data analytic services as consultant and helped companies to choose best solution to achieve their aims.- Lead software developers to deploy and config newly introduced solutions.- Create Continuous Integration/Continuous Deployment pipelines for streamlining build, testing, and deployment processes and provide multiple environments for production stage and development related to GitLab branches and deal with mock data creation- Set up and Participate in maintaining the on-premise Kubernetes cluster.- Setup monitoring and alerting systems using Prometheus, Promtail, Loki, Grafana, and ELK stack- Setup and maintain Sentry

- working with intense data systems with lots of logic and recording stock market metrics- advance transactional SQL queries on the database to calculate metrics and stored procedures- microservice architecture and different services for calculating logic and scheduling and grabbing high-volume trade dataflows- using Supervisord and Coredns for local environment to call services separately

complete design system architecture including - use Cloudflare as CDN, configure firewall and cache settings for maximum performance (RANK A+ in GTMETRIX)- HAPROXY ingress as k8s ingress controller and Nginx load-balancer cache handling- complete rolling updates with unit tests both for staging and production environments to achieve zero downtime for SEO purposes- k8s cronjobs in completely isolated environments to make backups from Stateful instances including Mysql clusters and Minio object storage - backend stack design based on Django Generic views and Django rest frameworks. complicated join strategies using Django ORM and row locks for system transactions.- Authentication using OTP (SMS) and handling Async task by celery and rabbitmq- complete Gitlab-CI design for creating docker images using Kaniko, tests, data fixtures, and static and media files migration on isolated environments for testing and deploy on k8s.- complete server system and service monitoring using sentry Prometheus grafana loki.- on premise gitlab,Mailu and other services

Iran one of the biggest companies for Human resource evaluations and ranking system.- Expressjs framework- PostgresSQL as a database and MongoDB as log datalake- working with lots of feature flags like enable exam time ,disable registration gateway,etc

- job recommendation system using Google big query + Machine Learning- Big data and Stream data Learning using Apache Spark- Expressjs framework