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Bablish Jaiswal

Senior DevOps Engineer at Helpshift Technologies Pvt Ltd | ex-Rakuten

Pune District

8+ years of work experience

Helpshift
Oct 20232 yrs 11 mosPresent

Pune District

DevOps Engineer | Helpshift Infrastructure & Platform Engineering: Spearheaded a zero-downtime OS migration for 750+ production instances from Ubuntu 14.04/18.04 (Trusty/Bionic) to Ubuntu 22.04 (Jammy), managing kernel compatibility, package migrations, dependency resolution, and coordinated service restarts across multi-region environments Diagnosed and resolved complex Linux performance issues across production systems, including CPU/memory pressure, I/O bottlenecks, OOM kills, and network latency — using tools such as perf, strace, ss, sar, and journalctl Hardened Linux system security at scale: enforced PAM configurations, sudoers policies, SSH hardening standards, and automated user lifecycle management across a large multi-region fleet Maintained 99.99% uptime across multi-region AWS and GCP infrastructure by applying SRE principles, on-call incident response, and proactive capacity planning DevOps & Automation: Implemented GitOps workflows using Argo CD and Helm, streamlining deployment pipelines and reducing release cycle time by 30% Built and maintained a full observability stack using Prometheus, Grafana, ELK, OpenTelemetry, and Tempo, enabling end-to-end distributed tracing and reducing MTTR by 25% Automated operational runbooks and SOPs covering database backups, vulnerability scanning, AMI remediation, S3 lifecycle policies, and cloud cost analysis Designed and maintained Terraform-based Infrastructure as Code (IaC) with GCS remote backend and state locking, enabling consistent, auditable, and repeatable provisioning of production-grade infrastructure
Rakuten Symphony
May 20221 yr 6 mosOct 2023

Tokyo, Japan

Kubernetes & Container Infrastructure: Managed and performance-tuned Linux environments powering large-scale GKE node pools and kubeadm — including kernel parameter optimization (sysctl), cgroup resource limits, and systemd service management for containerized workloads Monitored and administered large-scale GKE clusters using Prometheus, Grafana, and Alertmanager, enabling proactive alerting and capacity visibility across production workloads Implemented Workload Identity for secure, credential-free service-to-service authentication on GCP, eliminating reliance on static service account keys Automation & Tooling: Automated Linux infrastructure operations via Ansible playbooks and Bash scripts — covering OS hardening, package management, log rotation, and cron job management, reducing configuration drift and human error by 35% Developed internal tooling in Python and Go for Linux system diagnostics and operational automation, cutting manual engineering effort by 50% Configured a centralized monitoring and log aggregation pipeline using ELK Stack and Amazon CloudWatch, providing unified observability across hybrid cloud environments CI/CD & Developer Experience: Managed end-to-end CI/CD pipelines using Jenkins, enabling consistent, automated builds and containerized deployments across environments Reduced team onboarding time by 60% by authoring comprehensive internal DevOps documentation, runbooks, and standard operating procedures, improving knowledge transfer and operational consistency
i2k2 Networks
Jul 20192 yrs 11 mosMay 2022

Noida

System Reliability & Performance: Provisioned and managed high-availability Linux-based production systems — encompassing OS configuration, networking stack, disk management (LVM, RAID), and system-level performance tuning for sustained workload reliability Diagnosed and resolved 75+ unique Linux performance bottlenecks by profiling CPU scheduling, memory allocation, and disk I/O patterns — achieving a 20% increase in processing throughput across production systems Designed and maintained backup and disaster recovery (DR) strategies for critical workloads, ensuring business continuity and meeting recovery time and point objectives (RTO/RPO) Kubernetes Networking & Service Mesh: Implemented and maintained Kubernetes networking on Linux hosts — including Ingress controllers, iptables/nftables rule management, CNI plugin configuration, and L4/L7 load balancing for high-throughput microservice traffic Deployed canary releases using Istio service mesh, enabling progressive traffic shifting and controlled rollouts — directly contributing to a reduction in release-related incidents and supporting faster, safer release cycles Integrated OpenTelemetry and Tempo for end-to-end distributed tracing across microservices, improving root cause identification speed during production incidents Security & Compliance: Enforced Linux system security at the infrastructure layer: IAM policy management, filesystem-level access controls (ACLs, SELinux/AppArmor), vulnerability scanning, and network-level hardening — maintaining a consistent security posture across the fleet
Utho
Sep 201811 mosJul 2019

Noida

Bootstrapped production-grade multi-node Kubernetes clusters from scratch using kubeadm with HA control plane setup — building hands-on expertise in Kubernetes internals, etcd quorum, and control plane resilience before managed K8s (GKE/EKS) became the norm. Configured Ceph distributed storage (RBD + RGW) for scalable block and object storage on Linux, and developed custom OS templates and cloud provisioning packages — requiring deep knowledge of Linux filesystem internals, networking, and image lifecycle management. Automated network diagnostics using tcpdump, nmap, and tshark for security analysis and traffic inspection — laying the groundwork for the DevSecOps and infrastructure hardening practices I've applied at every role since.
Progression Infonet Pvt. Ltd.
Feb 20188 mosSep 2018

Gurugram

Began my infrastructure career managing Linux-based production systems across VMware, MySQL, and Zimbra — responsible for incident analysis using AWS CloudTrail and system logs, and real-time monitoring via PRTG, Observium and Checkpoint firewall analytics. Developed core Linux administration and network security fundamentals — filesystem management, user access control, service troubleshooting — that form the foundation of the systems-level depth I bring to Kubernetes and cloud infrastructure today. Built early operational discipline around change management, incident triage, and infrastructure documentation that scaled with me through every subsequent role.
GitHub
@linux-cnf

Bablish’s AI Stack

claude code
claude code
cursor
cursor
n8n
n8n
perplexity
perplexity

Education

Bharati Vidyapeeth University Institute of Management and Research (BVIMR)

BCA, Computer Science

Bharati Vidyapeeth University Institute of Management and Research (BVIMR)

20123 yrs2015

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Headline

Senior DevOps Engineer at Helpshift Technologies Pvt Ltd | ex-Rakuten

About

Web3 | AWS | Linux | Kubernetes | Docker | Terraform | Ansible | Helm | Argo CD | GitOps | GKE | GitHub Actions | Jenkins | Kustomize | Istio | Prometheus | Grafana | ELK | CEPH | DevSecOps | Advanced Bash Scripting | DeFi | DePIN | Web3 Infrastructure | LLM | AI | SRE Senior DevOps Engineer with 8+ years of experience in Kubernetes, cloud infrastructure, Linux, CI/CD, automation, and production operations. Strong hands-on expertise in GKE, Docker, Terraform, Helm, Argo CD, GitHub Actions, Jenkins, and Ansible. Experienced in building scalable, secure, and production-grade platforms across cloud-native and Web3 ecosystems. Certified: Red Hat Certified Specialist in Ansible Automation AWS Certified Solutions Architect – Associate Open to remote Senior DevOps / Cloud Infrastructure / Platform Engineering opportunities | Site Reliability Engineering | Immediate Joiner GitHub: linux-cnf/script

Location

Pune District

AI stack

claude code

cursor

n8n

perplexity

Work experience

DevOps Engineer at Helpshift, Oct 2023 - Present · 2 yrs 11 mos, Pune District, DevOps Engineer | Helpshift Infrastructure & Platform Engineering: Spearheaded a zero-downtime OS migration for 750+ production instances from Ubuntu 14.04/18.04 (Trusty/Bionic) to Ubuntu 22.04 (Jammy), managing kernel compatibility, package migrations, dependency resolution, and coordinated service restarts across multi-region environments Diagnosed and resolved complex Linux performance issues across production systems, including CPU/memory pressure, I/O bottlenecks, OOM kills, and network latency — using tools such as perf, strace, ss, sar, and journalctl Hardened Linux system security at scale: enforced PAM configurations, sudoers policies, SSH hardening standards, and automated user lifecycle management across a large multi-region fleet Maintained 99.99% uptime across multi-region AWS and GCP infrastructure by applying SRE principles, on-call incident response, and proactive capacity planning DevOps & Automation: Implemented GitOps workflows using Argo CD and Helm, streamlining deployment pipelines and reducing release cycle time by 30% Built and maintained a full observability stack using Prometheus, Grafana, ELK, OpenTelemetry, and Tempo, enabling end-to-end distributed tracing and reducing MTTR by 25% Automated operational runbooks and SOPs covering database backups, vulnerability scanning, AMI remediation, S3 lifecycle policies, and cloud cost analysis Designed and maintained Terraform-based Infrastructure as Code (IaC) with GCS remote backend and state locking, enabling consistent, auditable, and repeatable provisioning of production-grade infrastructure

DevSecOps Engineer at Rakuten Symphony, May 2022 - Oct 2023 · 1 yr 6 mos, Tokyo, Japan, Kubernetes & Container Infrastructure: Managed and performance-tuned Linux environments powering large-scale GKE node pools and kubeadm — including kernel parameter optimization (sysctl), cgroup resource limits, and systemd service management for containerized workloads Monitored and administered large-scale GKE clusters using Prometheus, Grafana, and Alertmanager, enabling proactive alerting and capacity visibility across production workloads Implemented Workload Identity for secure, credential-free service-to-service authentication on GCP, eliminating reliance on static service account keys Automation & Tooling: Automated Linux infrastructure operations via Ansible playbooks and Bash scripts — covering OS hardening, package management, log rotation, and cron job management, reducing configuration drift and human error by 35% Developed internal tooling in Python and Go for Linux system diagnostics and operational automation, cutting manual engineering effort by 50% Configured a centralized monitoring and log aggregation pipeline using ELK Stack and Amazon CloudWatch, providing unified observability across hybrid cloud environments CI/CD & Developer Experience: Managed end-to-end CI/CD pipelines using Jenkins, enabling consistent, automated builds and containerized deployments across environments Reduced team onboarding time by 60% by authoring comprehensive internal DevOps documentation, runbooks, and standard operating procedures, improving knowledge transfer and operational consistency

DevOps Engineer and Linux specialist at i2k2 Networks, Jul 2019 - May 2022 · 2 yrs 11 mos, Noida, System Reliability & Performance: Provisioned and managed high-availability Linux-based production systems — encompassing OS configuration, networking stack, disk management (LVM, RAID), and system-level performance tuning for sustained workload reliability Diagnosed and resolved 75+ unique Linux performance bottlenecks by profiling CPU scheduling, memory allocation, and disk I/O patterns — achieving a 20% increase in processing throughput across production systems Designed and maintained backup and disaster recovery (DR) strategies for critical workloads, ensuring business continuity and meeting recovery time and point objectives (RTO/RPO) Kubernetes Networking & Service Mesh: Implemented and maintained Kubernetes networking on Linux hosts — including Ingress controllers, iptables/nftables rule management, CNI plugin configuration, and L4/L7 load balancing for high-throughput microservice traffic Deployed canary releases using Istio service mesh, enabling progressive traffic shifting and controlled rollouts — directly contributing to a reduction in release-related incidents and supporting faster, safer release cycles Integrated OpenTelemetry and Tempo for end-to-end distributed tracing across microservices, improving root cause identification speed during production incidents Security & Compliance: Enforced Linux system security at the infrastructure layer: IAM policy management, filesystem-level access controls (ACLs, SELinux/AppArmor), vulnerability scanning, and network-level hardening — maintaining a consistent security posture across the fleet

Cloud and Security Engineer at Utho, Sep 2018 - Jul 2019 · 11 mos, Noida, Bootstrapped production-grade multi-node Kubernetes clusters from scratch using kubeadm with HA control plane setup — building hands-on expertise in Kubernetes internals, etcd quorum, and control plane resilience before managed K8s (GKE/EKS) became the norm. Configured Ceph distributed storage (RBD + RGW) for scalable block and object storage on Linux, and developed custom OS templates and cloud provisioning packages — requiring deep knowledge of Linux filesystem internals, networking, and image lifecycle management. Automated network diagnostics using tcpdump, nmap, and tshark for security analysis and traffic inspection — laying the groundwork for the DevSecOps and infrastructure hardening practices I've applied at every role since.

Linux Administrator at Progression Infonet Pvt. Ltd., Feb 2018 - Sep 2018 · 8 mos, Gurugram, Began my infrastructure career managing Linux-based production systems across VMware, MySQL, and Zimbra — responsible for incident analysis using AWS CloudTrail and system logs, and real-time monitoring via PRTG, Observium and Checkpoint firewall analytics. Developed core Linux administration and network security fundamentals — filesystem management, user access control, service troubleshooting — that form the foundation of the systems-level depth I bring to Kubernetes and cloud infrastructure today. Built early operational discipline around change management, incident triage, and infrastructure documentation that scaled with me through every subsequent role.

Education

BCA, Computer Science, Bharati Vidyapeeth University Institute of Management and Research (BVIMR)

Public links

github: https://github.com/linux-cnf