KRSTACK
Résumé Work with me

Professional experience

Infrastructure experience built through hands-on production operations.

Kundan Kumar Ram is an Infrastructure, DevOps & Platform Engineer with professional experience spanning systems administration, Linux engineering, cloud infrastructure, delivery automation, monitoring, databases, mail infrastructure, and production troubleshooting.

Opportunity focus

  • Infrastructure Engineer
  • Site Reliability Engineer
  • Senior DevOps Engineer
  • DevOps Engineer
  • Cloud Engineer
  • Linux Engineer
  • Platform Engineer
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Professional timeline

Responsibility across systems, delivery, and operations.

Open to Bangalore, remote, relocation within India, and suitable international opportunities.

  1. Mar 2025–Present

    Bangalore

    WhatJobs

    Linux & DevOps Engineer

    Contributes to Linux and application-platform operations, deployment automation, traffic controls, Kubernetes/GKE and mail-relay work, monitoring and alerting, Docker-based delivery, backup operations, and production troubleshooting.

    Selected responsibilities

    • Built lightweight deployment workflows using Git and Bitbucket Hooks for multi-server application delivery.
    • Configured Prometheus and Grafana monitoring and alerting for infrastructure and application components.
    • Delivered Dockerized applications behind Nginx, including access controls and HTTPS/TLS configuration.
    • Operated and troubleshot HAProxy traffic controls, backend health and routing, rate limiting, and production HTTP 4xx/5xx/504 conditions.
    • Worked on Kubernetes/GKE production operations and a mail-relay architecture, including workloads, services, configuration, access controls, monitoring, deployment, and troubleshooting.
    • Supported Postfix/SMTP relay infrastructure, mail queues, delivery failures, monitoring, logging, and network/provider troubleshooting.
    • Automated web analytics, log access, log rotation, and cron-job monitoring workflows.
    • Performed MySQL backup operations, server maintenance, and production issue investigation.

    Relevant technical context

    • Linux
    • Nginx
    • HAProxy
    • Docker
    • Kubernetes/GKE
    • GCP
    • Postfix/SMTP
    • Git
    • Bitbucket
    • Prometheus
    • Grafana
    • MySQL/MariaDB
    • Redis
    • Apache
    • SSL/TLS
    • Bash

  2. Feb 2024–Feb 2025

    Kolkata

    Codezin Technology Solutions Pvt. Ltd.

    Linux Administrator

    Operated Linux infrastructure and supported containerized application environments across RHEL, CentOS, and Ubuntu.

    Selected responsibilities

    • Deployed and managed Dockerized applications, Dockerfiles, and container images.
    • Managed LVM, filesystem configuration, storage practices, and backup/recovery operations.
    • Configured Apache, SSL/TLS, caching, reverse proxying, virtual hosts, and PHP-FPM integration.
    • Worked with development teams on deployment and infrastructure automation using Ansible.
    • Supported Linux system maintenance, monitoring, and configuration improvement.

    Relevant technical context

    • RHEL
    • CentOS
    • Ubuntu
    • Docker
    • Apache
    • PHP-FPM
    • Ansible
    • LVM
    • ext4
    • XFS
    • Btrfs
    • SSL/TLS
    • Backup/Recovery

  3. Jul 2022–Sep 2023

    Delhi

    Reve Systems India Pvt. Ltd.

    Linux Engineer – Software Service

    Supported Linux infrastructure and operational automation across AWS and hosting environments.

    Selected responsibilities

    • Managed Linux environments and supported infrastructure availability, scalability, and security practices.
    • Automated backups, monitoring, and routine maintenance using Bash.
    • Supported monitoring and alerting workflows for operational visibility and incident response.
    • Configured secure remote access and web-traffic management components.
    • Performed MySQL backup, recovery, tuning, and operational troubleshooting activities.

    Relevant technical context

    • Linux
    • AWS EC2
    • S3
    • IAM
    • VPC
    • Hetzner
    • OpenVPN
    • Squid
    • Bash
    • MySQL
    • Monitoring
    • Backup/Recovery

  4. Jan 2020–May 2022

    Kolkata

    AGS Transact Technologies Limited

    System Administrator

    Supported Linux-based retail systems, monitoring, MySQL administration, and technical support workflows.

    Selected responsibilities

    • Managed Linux-based system availability and performance support.
    • Implemented Zabbix-based system and application monitoring.
    • Administered MySQL for retail applications.
    • Supported POS-system operations and ticket workflows through ServiceNow.

    Relevant technical context

    • Linux
    • Zabbix
    • MySQL
    • ServiceNow
    • Retail systems support

Production engineering focus

Hands-on work, organised by engineering responsibility.

The following is a factual overview of confirmed professional hands-on experience. It intentionally avoids private infrastructure details, sensitive configurations, and unverified outcome claims.

01

Operate and troubleshoot production platforms

Hands-on Linux operations, Nginx and Apache, SSL/TLS, Docker, Kubernetes/GKE, MySQL/MariaDB, Redis, Solr, backup/recovery, firewall and VPN controls, and production diagnosis.

  • Linux
  • Nginx
  • Apache
  • Docker
  • Kubernetes/GKE
  • MySQL/MariaDB
  • Redis
  • Solr
  • SSL/TLS
  • Backup/Recovery
  • Firewall/VPN

02

Design reliable traffic and edge controls

HAProxy and Nginx load balancing, backend health checks, failover, routing, ACLs, rate limits, stick tables, backend weights, logging, monitoring, and HTTP 4xx/5xx/504 investigation.

  • HAProxy
  • Nginx
  • Cloudflare
  • Load balancing
  • Health checks
  • Failover
  • ACLs
  • Rate limiting
  • SSL/TLS

03

Build delivery and cloud foundations

GCP Compute Engine, GKE, Cloud Storage, VPC, IAM, Artifact Registry, Load Balancing, BigQuery, CDN, billing/cost monitoring; AWS EC2, S3, IAM, and VPC; Docker, Jenkins, Git, Ansible, Bash, Helm, rolling deployments, and production migration work.

  • GCP
  • Compute Engine
  • GKE
  • Cloud Storage
  • Artifact Registry
  • BigQuery
  • AWS EC2
  • S3
  • IAM
  • VPC
  • Jenkins
  • Ansible
  • Helm

04

Improve observability and recovery readiness

Prometheus, Grafana, Zabbix, exporters, alerting, logs/events investigation, MySQL/MariaDB backup/restore and replication work, storage troubleshooting, and production incident investigation.

  • Prometheus
  • Grafana
  • Zabbix
  • Alerting
  • MySQL/MariaDB
  • Replication
  • Logs
  • Backup/Restore

05

Operate mail infrastructure

Postfix and SMTP relay configuration, multi-instance Postfix, queue and bounce investigation, DKIM, SPF/DMARC-related troubleshooting, transport maps, header checks, mail-log investigation, provider delivery errors, queue monitoring, alerts, and SMTP/network/firewall diagnosis.

  • Postfix
  • SMTP
  • DKIM
  • SPF/DMARC
  • Mail queues
  • Prometheus
  • Firewall

Sanitized production evidence

Operational reasoning, without exposing employer infrastructure.

These representative areas describe professional hands-on work at a safe level of detail. They are not named-client records and do not make numerical impact claims.

HAProxy and HTTP incident investigation

Investigates production HTTP failures by correlating HAProxy signals, backend behaviour, request patterns, health checks, routing controls, logs, and upstream error conditions. Uses operational controls such as ACLs, rate limits, stick tables, backend weights, and health checks to understand and safely respond to 4xx, 5xx, and 504 conditions.

Mail relay and delivery troubleshooting

Works with Postfix/SMTP relay infrastructure, mail queues, delivery failures, deferred and bounced messages, provider/network errors, centralized log investigation, mail-queue monitoring, and production service maintenance.

Kubernetes/GKE production operations

Hands-on work across cluster and node-pool operations, deployments, Pods, Services, ConfigMaps, Secrets, Ingress, LoadBalancer services, Persistent Volumes/PVCs, RBAC, Service Accounts, scaling, rolling deployments, Helm, monitoring/exporters, logs/events investigation, deployment/migration, and backup/recovery-related work.

Public engineering evidence

Professional experience, public implementation records, labs, and writing are distinct.

Public work demonstrates implementation discipline. Engineering Labs demonstrate documented technical practice. Writing demonstrates operational reasoning. They support the professional profile without being presented as named-employer work.

Public implementation records Engineering labs Engineering journal KRSTACK Engineering on GitHub

Opportunities

Infrastructure, SRE, DevOps, cloud, Linux, and platform engineering conversations.

Open to Bangalore, remote, relocation within India, and suitable international opportunities.

Discuss an opportunity ramkundan275@gmail.com