Wimarsha Madhubhashana

Experience

• 

  SLIIT Software Engineering Service Division

  Jun 2005 - Sept 2005

  Traniee Software Developer
• 

  Pearson

  Nov 2016 - Dec 2017

  Trainee Database Administrator
• 

  Pearson Lanka

  Dec 2017 - now

  Work with Pearson's cloud infrastructure and its DevOps tools. And provide third-level applicationsupport for Pearson's critical applications.▪ Managing and Design Infrastructure with AWS Services (EC2, VPC, Elastic Cache, S3, etc).▪ Toil reduction using python scripting or shell scripting.▪ Configure repository management systems (Gitlab, Bitbucket).▪ Experienced in cost optimization, root cause analysis, and performance optimization.▪ Proposing and designing AWS infrastructure (VPC and network-level configurations) for newapplications, evaluating compute size (CPU and memory and network bandwidth), and costestimation.▪ Setting up and troubleshooting network-level issues on AWS – Configuring VPC/subnet/ElasticIP/NAT gateway/ NACL/ Security Group/ VPC Peering/ Internet gateway/ Route Tables.▪ Used configuration management tools such as Chef, and Ansible to automatically provision andconfigure systems (IaC).▪ Maintain datacenter based legacy applications and support on migration to AWS.▪ Maintaining load balancing with AWS ELB and ALB.▪ Setting up AWS ALB/ target groups and session and health check set up.▪ Planning and carrying out AWS migrations and data migrations.▪ Responsible for setting up & improving the Continuous Integration (CI) / Continuous Delivery (CD)environment pipeline for existing global & extremely complex environments using tools such asJenkins, GitLab CI, and AWS Code Pipeline.▪ Auto-scaling based on different metrics and optimized to save cost.▪ Configuring CloudWatch logs, maintaining retention period and setting up alerts.▪ application performance monitoring tools such as New Relic and Monza for hardware monitoring.▪ Automating recurring tasks to optimize the operation using Python, Linux Shell, SQL StoredProcedures, functions & triggers.▪ Used configuration management tools such as Chef, terraform and Ansible to automaticallyprovision and configure systems (IaC).▪ Involve R&D works to solve and improve DevOps works. Show less Responsible for managing mission-critical, highly transactional, and large (30+ TB) databasesrunning on Microsoft SQL Server.▪ Designing and configuring database backup strategies for Microsoft SQL Server (Full, Differential,and Log Backups).▪ Designing and implementing database high availability solutions. (Log shipping, Replication)▪ Defining and implementing event triggers that will alert potential database performance orintegrity issues.▪ Proactive database monitoring for production databases on a 24*7 basis (Mongo DB / MSSQLServer).▪ Analyze and optimize database queries based on the incidents recorded.▪ Involve database cluster installation for both MSSQL and Mongo DB.▪ Responsible for maintaining the stability of MongoDB database clusters across the globe.▪ Involve in database migration work which includes datacenter to Amazon cloud (Mongo DB),datacenter to another datacenter (MSSQL).▪ Involve with Database system planning/design/implementations for MongoDB.▪ Set up MongoDB Monitoring and alert for Production/Pre-production clusters.▪ Responsible for keeping MongoDB versions up to date.▪ Work with Development team and analyze the customer requirement and provide an effectivedatabase solution accordingly. Show less

  • Senior Site Reliability Engineer

    Feb 2022 - now

  • Database Administrator

    Dec 2017 - now