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Senior Linux & Cloud Infrastructure Engineer | 5+ Years Managing Production Environments I help businesses achieve 99.9%+ uptime, reduce infrastructure costs, and scale their web applications securely. ✅ PROVEN TRACK RECORD: - Currently managing 60+ production Linux servers (Ubuntu, CentOS, RHEL) for enterprise clients - Reduced server response time by 40% through optimization and CDN integration - Implemented automated backup systems saving clients 15+ hours/week - Zero critical security breaches in 5 years through proactive hardening 💼 CORE EXPERTISE: → Linux Server Administration (Ubuntu, CentOS, RHEL, Debian) → Cloud Platforms: AWS (EC2, S3, Route 53, IAM), Azure, Google Cloud → WordPress Infrastructure: GridPane, LiteSpeed, ModSecurity WAF, Cloudflare → Microsoft 365 & Azure AD: Full tenant management, MFA, Conditional Access → Automation: Ansible, Bash scripting, Infrastructure as Code → Security: WAF configuration, DDoS protection, STIG compliance, Wazuh SIEM → Virtualization: Proxmox, VMware ESXi, Hyper-V → Monitoring: Zabbix, Grafana, Prometheus, Loki 🎯 I SPECIALIZE IN: ✓ High-availability WordPress hosting architecture ✓ Server migration with zero downtime ✓ Security hardening and compliance (ModSecurity, OWASP rules) ✓ Microsoft 365 administration and migration ✓ Custom automation to reduce manual tasks ✓ Emergency server recovery and troubleshooting 📊 CLIENT RESULTS: - Migrated 50+ WordPress sites with 100% data integrity - Optimized page load times from 4s to <1s through server tuning - Configured multi-layered security reducing spam by 95% - Automated reporting saving clients 20+ hours monthly 🔧 TECHNOLOGY STACK: Web Servers: Apache, Nginx, LiteSpeed Control Panels: GridPane, cPanel, Plesk, aaPanel, CyberPanel Databases: MySQL, MariaDB, PostgreSQL Mail: SendGrid, Postal Mail Server, SMTP configuration DNS/CDN: Cloudflare, Route 53, DNS management Security: ModSecurity, Cloudflare WAF, Sophos, Fortinet FortiGate RMM Tools: Atera, ConnectWise, Datto, N-able Version Control: Git, GitHub Containers: Docker 💬 COMMUNICATION & AVAILABILITY: - Available for long-term contracts and ongoing maintenance - Fluent in English with strong technical communication skills - Fast response time during business hours (UTC+5:30) - Detailed documentation for all implementations - Proactive monitoring and alerting setup 📈 WHAT CLIENTS SAY: "Sunil resolved our critical server issues in under 2 hours and implemented monitoring to prevent future incidents. His expertise saved our business during peak traffic season." 🤝 LET'S WORK TOGETHER: Whether you need server optimization, cloud migration, WordPress infrastructure, or ongoing Linux administration, I bring technical expertise and business focus to deliver results. Message me with your project requirements, and I'll provide a detailed plan within 24 hours.

I'm a proficient Linux Server Administrator and PHP/Python programmer with over 15 years of experience. My expertise extends to web hosting, cloud, cluster, DevOps and blockchain technologies. Throughout my career, I have worked with numerous hosting providers and have gained extensive experience in addressing vulnerabilities, viruses, spam detection, server optimization, and server software optimization. As a DevOps professional, I collaborate with various companies with developer teams ranging from 1 to 50. I have extensive experience in automating infrastructure, implementing CI/CD pipelines, managing cloud environments (AWS, Azure, GCP), and ensuring system reliability and scalability. Below are my general skills: * Blockchain platforms: Bitcoin, Tron (TRX, USDT), Ethereum (ETH, USDT, USDC), XRP (full node & API) * DevOps: GitLab, GitHub, Azure DevOps. Project support, CI/CD * Optimization of Google Pagespeed, Magento, WordPress, ODOO, Mautic, Drupal, Joomla, Bitrix, Bitrix24, and other CMS * Operating Systems: Debian, Ubuntu, CentOS, Rocky Linux, AlmaLinux, RedHat, CloudLinux, Gentoo, FreeBSD (administration, configuration, audit, optimization) * Software Configuration Management: Salt, Ansible * Web servers: Nginx, Apache, LiteSpeed (installation, configuration, optimization) * Database servers: MySQL, PostgreSQL, MariaDB, Percona, MongoDB (installation, configuration, optimization, profiling, cluster creation) * Mail servers: Exim, Postfix, Sendmail, Zimbra, Qmail, Dovecot + Spamassassin, ClamAV * Webhosting Administration Panels: cPanel / WHM, Plesk, aaPanel, Proxmox, CyberPanel, VestaCP, HestiaCP, ISPManager, Billmanager, ISPConfig, DirectAdmin, Webmin * Monitoring: Zabbix, Wazuh, Munin, Nagios, Icinga * Amazon: AWS setup or Amazon tools * Virtualization: Proxmox, OpenVZ, XEN, KVM, VMWare, VirtualBox, Docker * Load balancing via: HAproxy, Nginx, Pingora, ProxySQL, PowerDNS, BIND, Route53, Alibaba Cloud DNS * System Backup and Restore automation * Removal of viruses and malicious software * Network services: DNS (Bind, PowerDNS), VPN (MPD, PPTPD, OpenVPN), firewalls (iptables, ipfw), file server (samba3/4), proxies (Squid, 3proxy, Privoxy, Nginx), DRBD, Ceph, GlusterFS, lsyncd * FTP: Vsftp, Pureftp, Proftpd Thank you for viewing!

☘ TOP RATED · 100% Job Success Senior System / DevOps Engineer with 13+ years of experience, specializing in the hosting industry, cloud infrastructure, and automation on AWS, GCP, and Azure. AWS Certified Solutions Architect – Associate. Core expertise: • Cloud & Infrastructure — AWS (EC2, VPC, RDS, Lambda, CloudFront, Route53, ELB, S3, ECS/ECR), GCP, Azure • Infrastructure as Code — CloudFormation, Terraform, Ansible • CI/CD & Automation — Jenkins, GitHub Actions, Bash, Python • Containers — Docker, Docker Compose, Kubernetes • Hosting & Web Stack — WordPress, Node.js, Ruby on Rails, .NET Framework / .NET Core Top projects: ☘ AWS Migration & Modernization — Migrated a production workload from AWS Lightsail to a multi-region AWS architecture (VPC, EC2 Auto Scaling, RDS Serverless v2, Route53, CloudFront, ELB, S3, Lambda). Fully managed as code with CloudFormation and automated via GitHub Actions and Python. ☘ Jitsi Video Platform — Provisioned, installed, and configured a production Jitsi deployment using Terraform and Ansible. ☘ Multi-Stack Web Hosting on OVH Cloud — Built, deployed, and managed JavaScript, Node.js, WordPress, and Ruby on Rails sites using Jenkins and Docker Compose. ☘ .NET on AWS — Dockerized and deployed .NET Framework and .NET Core APIs to AWS ECS/ECR with Jenkins and GitHub pipelines. I'm responsive throughout the day and happy to provide ongoing support after a project wraps up. Feel free to reach out any time — I'd be glad to help.

I specialize in deep Linux system administration, transforming unmanaged cloud environments into secure, high-performing infrastructure. 𝐁𝐞𝐲𝐨𝐧𝐝 𝐭𝐫𝐚𝐝𝐢𝐭𝐢𝐨𝐧𝐚𝐥 𝐚𝐝𝐦𝐢𝐧𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐨𝐧, 𝐈 𝐛𝐮𝐢𝐥𝐝 𝐚𝐧𝐝 𝐩𝐚𝐜𝐤𝐚𝐠𝐞 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 𝐬𝐩𝐞𝐜𝐢𝐟𝐢𝐜𝐚𝐥𝐥𝐲 𝐟𝐨𝐫 𝐋𝐢𝐧𝐮𝐱 𝐞𝐧𝐯𝐢𝐫𝐨𝐧𝐦𝐞𝐧𝐭𝐬, 𝐞𝐧𝐬𝐮𝐫𝐢𝐧𝐠 𝐬𝐨𝐟𝐭𝐰𝐚𝐫𝐞 𝐢𝐬 𝐨𝐩𝐭𝐢𝐦𝐢𝐳𝐞𝐝 𝐟𝐨𝐫 𝐭𝐡𝐞 𝐮𝐧𝐝𝐞𝐫𝐥𝐲𝐢𝐧𝐠 𝐎𝐒 𝐟𝐫𝐨𝐦 𝐭𝐡𝐞 𝐦𝐨𝐦𝐞𝐧𝐭 𝐨𝐟 𝐝𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭. Whether you are facing server bottlenecks, need to lock down vulnerabilities, or require a seamless migration, I focus on the core of system stability. With over two years of hands-on experience in production environments, I bypass surface-level fixes to optimize the underlying architecture. I engineer systems that stay online, load fast, and scale reliably. 𝐓𝐡𝐞 𝐕𝐚𝐥𝐮𝐞 𝐈 𝐁𝐫𝐢𝐧𝐠: → Executed zero-downtime production server migrations and configured highly available DNS clusters for hosting environments. → Hardened Linux servers and reduced critical vulnerabilities by 90% using advanced UFW/iptables and system call auditing. → Optimized NGINX/Apache environments to maximize resource efficiency on unmanaged cloud servers. → Cut AWS/Cloud infrastructure costs by 35% by right-sizing resources and eliminating architectural bloat. → Automated 80% of repetitive server management and deployment tasks using custom Bash and Python scripting. 𝐇𝐨𝐰 𝐈 𝐂𝐚𝐧 𝐇𝐞𝐥𝐩 𝐘𝐨𝐮𝐫 𝐓𝐞𝐚𝐦: 🔒 Security & Hardening - Deep SSH hardening, advanced firewall configuration (iptables/UFW), SSL/TLS implementation, and strict server access controls. ⚙️ System Administration - Complete setup and management of unmanaged cloud environments (Ubuntu/Debian/CentOS), low-level performance tuning, and server rescue. ☁️ Cloud Infrastructure - AWS (EC2, S3, RDS), GCP, and DigitalOcean - architecture, migration, DNS clustering, and cost optimization. 🐳 Containers & Automation - Streamlined Docker containerization and fundamental CI/CD pipeline setups (GitHub Actions/GitLab CI) for automated deployments. 📊 Monitoring & Diagnostics - Implementation of Prometheus, Grafana, and core Linux diagnostic tools to ensure proactive performance visibility. 🛠️ Scripting - Python and Bash scripting for system diagnostics, automation, and custom server administration tools. 𝐇𝐨𝐰 𝐈 𝐰𝐨𝐫𝐤: I communicate clearly, respond fast, and document everything. You'll always know what's happening with your infrastructure. I'm available for both project-based work and ongoing retainer engagements. Let's secure your infrastructure and automate your operations. Hit "𝐈𝐧𝐯𝐢𝐭𝐞 𝐭𝐨 𝐉𝐨𝐛" or message me directly; I typically respond within an hour.

23+ years in Linux/Windows administration, DevOps, and cloud infrastructure. I build, secure, and scale production systems 24/7 — for MSP clients and direct engagements across industries. If your server is down, your deployment is failing, or you need infrastructure built right the first time — I'm the engineer you call. ━━ SERVER & SYSTEMS ━━ Linux (CentOS, Debian, Ubuntu, Amazon Linux, Rocky Linux) and Windows Server (2012–2025). Active Directory, Group Policy, Intune, hybrid identity. Nginx, Apache, Sendmail, Qmail, Postfix, Exim — MTA setup, Dovecot, SpamAssassin, OpenDKIM, SPF/DKIM/DMARC. Veeam, Acronis, cloud-native DR. Hypervisors: KVM, VMware ESXi, Hyper-V, Proxmox VE — HA clusters, live migration, Ceph/ZFS, Proxmox Backup Server. Redis, Varnish. QNAP NAS — storage management, Plex Media Server deployment, VPN tunnel integration. WHM/cPanel, Plesk, Virtualmin, CloudPanel, CyberPanel. ━━ CLOUD INFRASTRUCTURE ━━ AWS: EC2, ECS, EKS, RDS, S3, Route 53, IAM, VPC, CloudWatch, Lambda, API Gateway, Elastic Disaster Recovery. GCP: Cloud Run, Cloud Build, Firestore, GKE, IAM, VPC, Pub/Sub, Cloud Storage, Secret Manager, Cloud Monitoring. Cloudflare (WAF, Workers, Zero Trust, CDN). DigitalOcean, Hetzner, Vultr. MinIO: S3-compatible object storage on bare metal, VMs, Kubernetes — distributed mode, SSE-S3/KMS, lifecycle policies, drop-in S3 for backups and MLOps. Railway: Full-stack PaaS — GitHub/Docker auto-build, managed DBs (PostgreSQL, MySQL, Redis), private networking, env variables, cron workers, auto-scaling. ━━ SECRETS MANAGEMENT ━━ HashiCorp Vault: Dynamic secrets for AWS IAM, databases, cloud providers — TTL-bound credentials, auto-revoke. PKI for internal CA and on-demand TLS. Vault Secrets Operator for Kubernetes (etcd-free pod injection). Raft HA, RBAC, audit logging, Shamir unseal. Transit engine for encryption-as-a-service. CI/CD integration to eliminate hardcoded credentials. ━━ DEVOPS & CI/CD ━━ Docker, Kubernetes (EKS + self-managed: kubeadm, k3s, RKE2), Helm, Kamal. GitHub Actions, GitLab CI, Bitbucket Pipelines. Terraform, Ansible. ArgoCD, Flux (GitOps). Prometheus, Grafana, Datadog. Traefik: Cloud-native ingress — auto TLS, Docker/K8s service discovery, ForwardAuth, rate limiting, canary routing. Caddy: Zero-config-TLS reverse proxy — automatic HTTPS, on-demand certs. Preferred for self-hosted stacks. ━━ NETWORKING & SECURITY ━━ WireGuard, OpenVPN (MFA/ZTNA), IPSec/Libreswan, Xray/REALITY. Tailscale/Headscale — self-hosted mesh VPN, VPS tunnel setup, ACL policies, subnet routing. MikroTik, Juniper, SonicWall, Fortinet (FortiGate, FortiManager, FortiAnalyzer). pfSense, OPNsense. BGP, OSPF. Auth0, OAuth2, OIDC, Duo Security. LDAP/RADIUS, 802.1x, NPS/AD CS/Intune. ━━ DEVELOPMENT & AUTOMATION ━━ Python: FastAPI, Flask, Django, RESTful APIs, OpenAI API, ETL pipelines (Airbyte), orchestration (Airflow, n8n), data processing (pandas), Retool internal tools. Clean, documented, production-ready code. ━━ CONTAINERIZATION & DEPLOYMENT ━━ Docker Compose, Kubernetes manifests, Helm. Portainer, Coolify, Elestio, Traefik, Caddy. MinIO (K8s Operator/Tenant). Nextcloud, n8n, self-hosted app deployment. Vercel, Railway, Netlify, Replit. ━━ MSP & VOIP ━━ Duo Security, SpamTitan, ScreenConnect, ESET, Acronis. M365 multi-tenant administration. Asterisk and Vicidial (AWS + on-prem) — SIP trunks, IVR, call center setup, NetSIP integration. ━━ LEGACY & EARLY CAREER ━━ Foundational background in Windows desktop application development (VB, C#, Access) and web development (Core PHP, Laravel). ━━ WHAT CLIENTS HIRE ME FOR ━━ ► Emergency triage: servers down, services failing, breaches in progress ► Greenfield AWS/cloud environments built to security and compliance best practices ► CI/CD pipelines rebuilt to work reliably — no more failed deployments at 2am ► Self-hosted stacks that cut cloud bills without cutting uptime ► Kubernetes from scratch: EKS, k3s, RKE2 — setup, Helm, GitOps, day-2 operations ► HashiCorp Vault rollouts — eliminate hardcoded credentials across all pipelines ► Proxmox VE clusters: HA, live migration, Ceph storage, Proxmox Backup Server ► Network redesigns: Zero Trust, WireGuard mesh, BGP multi-homed, FortiGate, pfSense ► Ongoing managed infrastructure support and 24/7 incident response ► GCP solution design & delivery — Cloud Run, microservices, IAM, developer onboarding/offboarding ► Infrastructure, Security & Application Audits — server, network, database, cloud, and web stack ━━ INDUSTRIES SERVED ━━ SaaS · Fintech · Healthcare · E-commerce · Legal · Real Estate · Media · Education · Government · Telecoms · Startups · Enterprise. Single-server MVPs to multi-region, multi-account production environments. ━━ COMMUNICATION & PROCESS ━━ I don't disappear after the kickoff call. Clear updates at every stage, thorough documentation, and a proper handover on every engagement. Timezone-flexible. Slack, Teams, WhatsApp, Zoom, or Webex. If the work matters, it gets done right.

Multi-discipline system engineer with more that 25 years of experience on Linux/Unix, networking, high performance computing and high availability / high reliability systems. Interested in: - Building large scale high-loaded web platforms running in heterogeneous environment - High performance networking with SDN/NFV - Embedded development and wireless technologies, mostly small-sized and power-efficient (IoT, etc).