Rahul B

About Rahul B

I\'m an SRE at Barclays, focused on keeping production stable while everything around it…

Experience

1. Sre Devops Engineer

   Barclays

   Feb 2024 — Present · Las Vegas, NV, US

   Architected multi-region landing zone in AWS and Azure using Terraform & CloudFormation, enabling 99.99% availability for 3 financial trading platforms processing millions of daily transactions.• Implemented CI/CD pipeline with Jenkins, automate blue-green deployments using ArgoCD on Kubernetes, cutting rollback incidents by 40%.• Automated Linux patching, user/group provisioning, and kernel parameter tuning across 200+ RHEL servers using Ansible & Bash, cutting MTTR by 30% and ensuring CIS benchmark compliance.• Built production controllers and Python services to automate deployment health checks, progressive delivery, and automatic rollback on SLO burn, reducing deployment-related incidents 40% and sustaining 99.99% availability.• Implemented cost-optimization measures by shifting 30% of batch compute to AWS lambda and EC2 spot instances and applying S3 lifecycles policies to migrate data to S3 glacier reducing computing and Storage cost by 30%.• Led on-call triage across application, runtime, and network layers using p99 latency, TCP retransmits, and GC telemetry; reduced MTTR from 45 minutes to 25 minutes through targeted automation and improved runbooks.• Authored design documents for a multi-region landing zone using Terraform and ARM and facilitated design reviews with stakeholders; reduced environment setup time 60% and validated failover across three regions.• Standardized Helm charts and enforced GitOps with Argo CD across more than twenty services, driving configuration drift to near zero and improving new-team onboarding speed 50%.• Performed approximately 20+ code reviews per month and strengthened unit and integration test gates in CI, reducing release regressions 30%.