Anfal Ratul

DevOps Engineer

NEC • Vollzeit

Apr 2026 - Present • 6 mos

1. Performed vulnerability assessment and penetration testing VAPT using OpenVAS, Nmap, Masscan, and OWASP ZAP to identify and fix security risks. 2. Configured iptables firewall rules to block vulnerable ports and secure public-facing servers. 3. Managed SSL certificates and configured Nginx reverse proxy for multiple subdomains. 4. Built custom script-based health monitoring system with Telegram alert integration and email for real-time server health notifications. 5. Deployed and managed over 70 Docker containers running NestJS microservices across production data center and disaster recovery environments. 6. Designed and maintained disaster recovery DC-DR failover architecture for high availability. 7. Built custom AES-256 encryption tools for securing sensitive environment configuration files with developers. 8. Set up CI/CD pipelines to automate and accelerate app and web deployment. 9. Configured YAML deployment files and deployed campaign management microservices that enable teams to send SMS, email and advertising campaigns through bulk file uploads. 10. Configured and managed Fortinet FortiGate firewalls for network security across multiple data center environments DC & DR. 11. Set up AWS Site-to-Site VPN tunnels using Fortinet FortiGate and IPsec Phase 1 & Phase 2 configuration, connecting Dhaka Colo data center with AWS cloud for hybrid cloud and disaster recovery support. 12. Performed network security optimization including firewall rule tuning, port hardening and traffic filtering to improve overall infrastructure security posture.

DevOps Engineer

Red Technologies Limited • Vollzeit

Jan 2024 - Jul 2025 • 1 yr 6 mos

1. Implemented CI/CD pipelines using Git actions, Jenkins and Docker for automating deployments. 2. Managed infrastructure on AWS, including EC2, S3, and RDS for Fintech Projects. 3. Collaborated with development teams to optimize application performance and reliability. 4. Used Prometheus for monitoring and Grafana for visualizing metrics. 5. Employed OpenSearch for log management and Filebeat for shipping logs, facilitating effective log analysis and troubleshooting. 6. Managed data on MySQL, MSSQL and PostgreSQL, handling tasks related to database administration, performance tuning, and query optimization. 7. Implemented load balancing solutions to distribute traffic evenly across servers. 8. Used MinIO for high-performance object storage, providing a scalable and cost-effective solution. 9. Employed Apache Kafka for stream processing and real-time data integration. 10. Utilized Kong Gateway for API management and service orchestration, ensuring secure and efficient API interactions.