Debashish Bose Email & Phone Number

India

India

• Converted client business requirements into cloud infrastructure design considerations, with focus on performance, scalability, availability, and security• Engaged with customers, project leads, and cloud vendors to identify key requirements and system components necessary to design and build roadmap to cloud• Undertook landscape assessments on operating systems, middleware, databases, and security, using TCS and AWS proprietary tools• Contributed to the foundational design of organizational units, accounts, networks, security measures, and other essential infrastructure components for centralized management across multiple AWS accounts• Accomplished high-level (HLD) and low-level designs (LLD), created desired state infrastructure on cloud using cloud services• Enforced guardrails and service control policies from control tower• Conducted proof of concept (POC) migrations, assessed migration strategies and 'R' factors. Provided recommendations for application modernization by replacing existing infrastructure with cloud-native solutions whenever feasible.• Constructed Terraform and Packer modules for infrastructure and image creation, respectively, and improved entire cloud infrastructure creation process via CI/CD pipelines using GitHub and GitHub Actions thereby decreasing manual exercise by 70%• Designed Deployed and maintained Kubernetes cluster on AWS. • Carried out Kubernetes version upgrades for multi-node Kubernetes cluster• Prepared comprehensive monitoring and logging solutions for full visibility into different platform components using CloudWatch custom metrics and by enabling CloudWatch logs• Engineered backup solutions and disaster recovery solutions for service availability and resilience in alignment with customer's RTO and RPO

Bengaluru, Karnataka, India

• Coached team of 30 engineers as part of DevOps team• Facilitated baseline network design for Cloud, including essential network components such as Transit Gateways, Cloud VPN, Direct Connect, and Transit peering• Promoted security best practices across OU, account, network, application, and data layers by implementing account network ACLs, security groups, web application firewalls, DDoS protection tools, encryption certificates, and KMS keys• Minimized human labour by customizing AMIs and IAC using Packer and terraform modules written in JSON and HCL through CI/CD pipelines• Leveraged WAF, Shield, Guard duty for security best practices• Utilized AWS lambda Event Bridge and DynamoDB for event-driven cloud architecture solutions• Developed custom scripts for Linux patching in cloud thereby eradicating manual effort by 80% • Collaborated with application engineering and cloud platform teams to create migration paths for legacy applications modernizing into microservices architecture using Docker images followed by Installing and managing them on ECS and EKS• Troubleshooted issues related to Kubernetes infrastructure, applications, and networking• Configured AWS logs (CloudTrail logs, AWS Config logs, VPC Flow logs, Resource Access logs, Firewall logs, Security Hub/Guard Duty logs) to CloudWatch log groups and pushed them to S3 with lifecycle enabled

Bengaluru, Karnataka, India

• SME Linux Engineer, supporting infrastructure for $300M company• Orchestrated RedHat and VCS cluster planning, creation, and administration• Utilized AWS services such as AMI, EC2, EBS, Autoscaling, ELB, IAM roles and policies, VPC, subnets, security groups, NACL, NAT gateway, Cloud VPN, VPC peering, Transit Gateway, Amazon CloudFront• Devised and leveraged SNS and SQS solutions and oversaw Route 53 records and routing policies• Deployed managed databases on Amazon RDS spread across multiple AZ.• Built and maintained automated CI/CD pipelines for infrastructure code deployment cutting down repetitive work• Liaised with AWS and Linux vendors on escalated issues until resolution followed by adequate documentation, including RUN book and RCA.• Guided the team to analyse and resolve infrastructure vulnerabilities and application deployment issues.• Monitored and tested application performance to identify potential bottlenecks, develop solutions and collaborate with developers on solution implementation.• Delivered second (2nd) and third (3rd) level technical support to clients worldwide

Bengaluru, Karnataka, India

• Managed Linux infrastructure on multiple variations to achieve 24/7 uptime• Installed and upgraded Linux systems• Administered Veritas and RHEL clusters, SUSE manager, and Spacewalk• Volunteered and attained disaster recovery on VMware environment.• Tuned system performance to optimize efficacy of new and existing hardware components. Resolved trouble tickets to remove backlogs by 80%.• Took part in Configuration management using Shell scripts

Bengaluru, Karnataka, India

• OS builds, patch distribution, and vulnerability remediation to trip down repetitive incidents by 50%.• Created customized golden template for VM provisioning and performed OS hardening and kernel tuning• Identified and fixed open issues using automation and scripting.