Oct 2019 – Aug 2021 · 1 yr 10 mos · Sydney, New South Wales, Australia

• Working as DevOps Engineer to advice AWS's Enterprise and Business level customers for their workloads running on AWS Infrastructure.
• Interacting with the clients to understand their requirement with respect to AWS DevOps services, helping them on-board AWS, suggesting best practices & architectures and providing expert services for technical issues.
• Helping Infrastructure Engineers with CloudFormation for their issues and suggesting better approaches for orchestration. Also creating customize CloudFormation Template as Infrastructure as a Code in single account/region or in multiple accounts as StackSets.
• Helping Microservices administrators with EC2 Container Service / Fargate & Docker related issues and helping them migrating their microservices based solutions to AWS. Helping them run their batch processing workloads on AWS Batch service.
• Helping developers to run their applications on Elasticbeanstalk without having to worry about backend infrastructure.
• Helping System Administrators to manage Configuration management of their AWS resources or On-Premise servers using OpsWorks and Chef Automate.
• Helping developers & DevOps engineers to use AWS Deployment services like CodeBuild, CodeCommit, CodeDeploy, CodePipeline for CI/CD integration.
• Helping multi-account AWS owners setting up a governance controlled, secure, reliable multi-account architecture using Control Tower, Service Catalog, AWS Org, SSO etc. following principles of Well Architected Framework.
• Creating Lambda Function or debugging the code level and integration level issues in API gateway using CloudWatch logs and x-ray
• Touched various AWS Security services like IAM, ACM, KMS, SecretsManager, GuardDuty, Inspector, WAF, CloudTrail and Config.
• Assistance to resolve and prevent production incidents in highly critical environments.
• Design and advise CI/CD solutions for traditional, micro-services, container architectures.

Jan 2019 – Sep 2019 · 8 mos · Sydney, Australia

Apr 2016 – Dec 2018 · 2 yrs 8 mos · Sydney, Australia

• Setup Linux infrastructures (RedHat 6 & 7, CentOS 6 & 7 and Ubuntu 12 & 14), Database SQL (MySQL, Percona).
• Implemented CI/CD Tools (Jenkins, Capistrano, GitLab, SaltStack). Managing Infrastructure automation and provisioning container on OpenStack based environment using SaltStack and Python, reduced Virtual machine with container configuration delivery time from 3 days to 4 hours.
• Handled automation using JavaScript, PHP, Python, Ruby, Bash for Build, Deployment/Rollback, maintenance, Database Backup/Restore/Rollback and Report.
• Designing, implementing and supporting fully automated Continuous Integration and Continuous Delivery processes for multiple projects using Jenkins, JNLP Nodes, Capistrano, SaltStack and GitLab.
• Automated build and deployment process with Jenkins, JNLP Nodes, Maven and Capistrano with full auditing and user authentication/ authorization provided by the corporate Active Directory, eliminating 80% of manual work.
• Leading DSU infrastructure support and DevOps/L3 offshore team.
• Responsible for solving L3 / L4 Critical issues of Web server, the Application server including Virtual Network issues for Clients across the Globe into the Productions Environments within stipulated SLA.
• Technical Change Validation apart from non-routine (patch updates).
• Writing technical documents (Standard routines and one pager) for infrastructure and DevOps tools related solutions.
• Ensured application availability and data integrity through preventative maintenance and upgrades.
• Train customers and offshore team members for the new solutions.
• Followed Agile methodologies for Project management using tools as Jira and Confluence. Create User Stories based on the requirements gathered from all the stakeholders and maintain updates on Jira and Confluence portal.

Oct 2015 – Apr 2016 · 6 mos · Kolkata Area, India

• Worked with client company Tata Consultancy Services Ltd Design from parent company Future Focus Infotech Pvt. Ltd. and implement CI/CD Tools for build, deployment, and configuration management using various DevOps tools like Jenkins, Vagrant, Ansible and GIT.
• Involved in planning, designing, developing and maintenance of various Linux Server and Network environments.
• Automating deployment of Linux applications, system configurations and security settings using Jenkins, Maven, and Bash script on CloudStack and AWS environment.
• Writing pipeline jobs in Jenkins portal.
• Worked with AWS services like EC2, S3, Route53, SQS, IAM, CloudWatch and CloudFormation.
• Developing scripts for Build, Deployment/Rollback, maintenance, Database Backup/Restore/Rollback and Report related tasks using Jenkins and Bash.
• Collaborating with developers to make sure new environments meet requirements and conform to best practices.
• Responsible for solving L3 / L4 Critical issues of the Web server, Application server including Virtual Network issues for Clients across the Globe into the Productions Environments.
• Installation, Configuration and troubleshooting of Linux server (Redhat, CentOS, Ubuntu) for staging and production environment for JBoss and Tomcat Java Application server, Apache web server and MySQL database server.
• Setting up monitoring with the help of network-based and Linux based monitoring tools to monitor servers/ application/network.
• Database Administrator activities - Backup/refresh/Restore, gate-keeping regarding the running of SQL and other correction/modification scripts on the live system using Jenkins, JNLP connector and the Bash script.
• Write and manage script to automate different tasks at Linux server using Bash Script and Cron Job Write the Technical Specification documents for infrastructure and DevOps tools based on the agreed-upon requirements
• Train customers and team members for the new solutions.

Oct 2011 – Aug 2015 · 3 yrs 10 mos · Kolkata Area, India

• Designing, implementing and supporting fully automated Continuous Integration and Continuous Delivery processes for multiple projects using Jenkins, Puppet and GitLab.
• Worked with AWS services like EC2, S3, Route53, SQS, IAM, CloudWatch and CloudFormation.
• Build automatic deployment using Jenkins, Maven, GitLab plugin and the Bash script.
• Configuration and troubleshooting of Linux server(Redhat, CentOS, Ubuntu) for staging and production environment for JBoss and Tomcat Java Application server, Apache web server and MySQL database server
• Collect data in order to evaluate the network’s or system’s performance and help make the system work better and faster
• Add users to a network and assign and update security permissions on the network
• Setting up monitoring with the help of network-based monitoring tools like Nagios to monitor servers/ application/network
• Designing and implementing Cloud basic and advanced network using CloudStack internal SND NFV (Virtual Router) and integrated with Citrix NetScaler load balancer.
• Responsible for network evaluations, troubleshooting a variety of network problems, and implementing various software and hardware upgrades. Handle the tasks of configuring and deploying wireless solutions.
• Working on designing isolated (VLAN) network for different type of traffic for cloud networks i.e. Management network, Storage network, and Public network and tenant network
• Database Administrator activities - Backup/refresh/Restore, gate-keeping regarding the running of SQL and other correction/modification scripts on the live system
• Write and manage script to automate different tasks at Linux server using Bash Script and Cron Job
• Prepare project documents that are needed for various audit purpose

Oct 2005 – Oct 2013 · 8 yrs · Kolkata Area, India

• Pragyaan Infotech Private Ltd., the new name of this company.
• Involved in planning, designing, developing and maintenance of various Linux Server and Network environments.
• Setting up LAN and wireless network for the consumers using the wireless ADSL routers manufactured by all leading networking companies like Cisco, Linksys, D-link, securing the wireless network based on wireless inscription supported by the respected routers.
• Troubleshooting TCP\IP based issues on Windows and Linux based machines which prevented users from getting connected to the network, making sure any other software that instigates itself with networking services is not blocking the access to the network.
• Setting up monitoring with the help of network-based monitoring tools like Nagios to monitor servers/ application/network.
• Configuring Data VLAN, setting up IP addresses, gateway servers, troubleshooting the Ethernet ports and connectivity failures.
• Monitoring and maintaining Network (LAN, WAN, server, switches, and router) infrastructure in a datacentre.
• Upgrading Wireless LAN controller using CLI through console port by ensuring the upgrade file resides in the root directory of TFTP server. Also, SSH or Telnet can be used to complete the procedure when available in the controller.
• Installation, Configuration, and troubleshooting of Linux Servers (Redhat, CentOS, Ubuntu).
• Creating file system (ext2, ext3, ext4, xfs), disk partitioning and troubleshooting.
• Managing LVMs and storage associated with Linux filesystem (mounting, scanning and troubleshooting).
• Configure DNS, NIS, NFS, Samba, DHCP and troubleshooting issues associated with it.
• Write and manage script to automate different tasks at Linux server using Bash Script and Cron Job.
• Maintaining end user documentation for hardware/software applications, support logs and other related information; researches and recommends project related network and server hardware and software.