Apr 2023 – Sep 2024 · 1 yr 5 mos · Noida, Uttar Pradesh, India

• EKS Migration: Lead migration of application workloads from EC2 to EKS. Created EKS cluster, EKS managed and self managed worker node groups. Handled EKS cluster and it's add-ons upgrades with zero downtime. Utilised tools for EKS such as HPA, KEDA, cluster-autoscaler, NTH, kube-state-metrics, metrics-server, Istio. Implemented end 2 end alerting, monitoring and logging of Kubernetes components.
• Optimised infrastructure costs by leveraging Graviton (ARM) and AMD instances, spot instances, and multi-architecture images using buildx.
• Kubernetes CI/CD: Automated service onboarding using Helm charts and designed canary rollout strategies with ArgoCD. Implemented Argocd RBAC along with Keyclock SAML login.
• Implemented Istio service mesh to improve service-to-service communication, security, and traffic management for over 100 microservices, and integrated Pinpoint as APM for distributed tracing of S2S communication.
• Central CD: solution for Paytm's EC2-based services using Python, AWS SDK Boto3, Jenkins shared libraries, AWS CodeDeploy, Lambda, SNS, and DynamoDB, resulting in standardised EC2 deployments
• Utilized Cortex and SIEM for security monitoring and incident response.
• Conducted regular vulnerability assessments using Qualys, generating reports for actionable insights. Managed quarterly patching of production infrastructure based on vulnerability reports, ensuring security compliance. Implemented Trivy for Docker image scanning to ensure secure container deployments.

Apr 2022 – Jun 2023 · 1 yr 2 mos · Noida, Uttar Pradesh, India

• EC2 Migration: Worked on migrating services from on-permises data centre to AWS cloud.
• Created automation using Python and Boto3 to handle disaster recovery simulation of AWS EC2 infrastructure of more than 200 ASGs. Used this automation to showcase Payment Gateway infra's resiliency and high availability.
• Jenkins CI: Worked on migrating entire build system from data centre to AWS. This included migrating Jenkins, Jenkins build jobs, Jfrog artifactory. Implemented RBAC solution for Jenkins using OpenID Connect and Keycloak.
• Created terraform modules for infrastructure provisioning and integrated terraform with change management process.
• Created Ansible roles for EC2 server bootstrapping and user management.
• Worked on EC2 application monitoring and alerting using Telegraf, Prometheus, Grafana and Pinpoint.
• Created and managed production grade clusters for ELK, RabbitMQ and Hashicorp Vault.
• Worked in collaboration with Dev/QA/Staging teams for creating and supporting multiple environments on AWS EC2 and EKS.
• Created automations using Groovy and Python for centrally managing 1000+ ASG's spanning across multiple AWS accounts.
• Created Lambda functions using Boto3 for alerting automated deployment failures in AWS and integerated the same with AWS Codedeploy.
• Optimised S3 costs across multiple AWS accounts from centrally managed automation using Python, Boto3 and Groovy.
• As part of 24x7 on-call rotation supported complex issues related to Payment Gateway's critical applications. Provided detailed RCA's wherever required.

Jan 2021 – Apr 2022 · 1 yr 3 mos · Noida, Uttar Pradesh, India

• Using Jenkins, Bash, Python and Ansible created CI/CD solutions for applications hosted in On-Premises data centre.
• Applied patches to existing Puppet modules and utilised Foreman for deployment on On-Premises data centre servers.
• Supported Dev/QA issues on On-Premises Kubernetes cluster and created Jenkins pipelines using bash groovy and Python.

Sep 2020 – Dec 2020 · 3 mos

• Migrated legacy data ingestion jobs from Microsoft SQL Server Integration Services (SSIS) to Python modules.

Aug 2018 – Sep 2020 · 2 yrs 1 mo

• Created Python modules for an in-house reporting tool `Blue-Optima` utilising REST APIs for data collection and SQLAlchemy ORM for data ingestion.
• Containerised Python app for Openshift cloud and created Jenkins pipelines for deploying reporting tool `Blue-Optima` .
• While working as Bitbucket admin developed and managed customised Groovy based web-hooks for Bitbucket, to meet Barclays org wide requirements.
• Managed 24x7 uptime, patching and upgrades of centrally hosted Bitbucket servers in private cloud of Barclays.