Hire the Best OpenACS Specialists

I am a RedHat certified Systems Administrator/Engineer 1.5+ years experience in Linux server support/Webhosting Support, My expertise include Linux server support, Familiar with various control panels like cPanel,plesk,etc., MySQL, Web servers like Nginx,Apache,etc., Mail servers like postfix,exim,sendmail,etc. I am looking forward to speaking with you about how we can work together.

I help businesses secure and optimize Linux infrastructure, firewalls, VPNs and virtualization environments. Specialized in: Network & Security: OPNsense | pfSense | Wazuh SIEM Wireless & Infrastructure: Ubiquiti UniFi Ecosystem Virtualization & Backup: Proxmox VE | Proxmox Backup Server VPN & Connectivity: WireGuard | OpenVPN | Cloudflare Tunnel SysAdmin & DevOps: Linux Servers | Docker | Reverse Proxy Core Services: Network Troubleshooting | Infrastructure Hardening I work mainly with: VPN issues Firewall configuration Secure remote access Reverse proxy problems Linux server deployments Monitoring and log analysis High availability environments I focus on fast troubleshooting, security best practices and stable infrastructure delivery. If you need someone to solve infrastructure and security problems quickly and professionally, let’s talk.

Need someone who can manage your Linux infrastructure and actually knows what's happening below the application layer? I'm Shivam, a Linux systems engineer and DevOps specialist with 5+ years of experience, and a contributor to the Linux kernel mainline. I build, secure, and debug Linux servers and cloud infrastructure with the kind of low-level systems knowledge most DevOps engineers don't have. 𝐇𝐎𝐖 𝐈 𝐂𝐀𝐍 𝐇𝐄𝐋𝐏 𝐘𝐎𝐔 🐧 𝐋𝐢𝐧𝐮𝐱 𝐒𝐲𝐬𝐭𝐞𝐦 𝐀𝐝𝐦𝐢𝐧𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐨𝐧 Provision, configure, and harden Linux servers (Ubuntu, Debian, RHEL/CentOS). Comfortable with systemd, networking, user/permission management, backups, and security hardening for production systems. 🧩 𝐋𝐢𝐧𝐮𝐱 𝐊𝐞𝐫𝐧𝐞𝐥 𝐃𝐞𝐛𝐮𝐠𝐠𝐢𝐧𝐠 & 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐓𝐮𝐧𝐢𝐧𝐠 As an actual contributor to the Linux kernel mainline, I can dig into problems most admins can't, kernel-level memory issues, driver conflicts, and performance bottlenecks below the application layer, not just symptom-level fixes. ⚙️ 𝐃𝐞𝐯𝐎𝐩𝐬 & 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 𝐚𝐬 𝐂𝐨𝐝𝐞 CI/CD pipelines, Docker containerization, and Terraform-managed infrastructure. I build fault-tolerant, repeatable systems instead of fragile ones held together with manual SSH sessions. 🌐 𝐂𝐥𝐨𝐮𝐝𝐟𝐥𝐚𝐫𝐞 𝐒𝐞𝐭𝐮𝐩 & 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧 DNS configuration, CDN tuning, WAF/security rules, and Cloudflare Workers for edge logic, get your site fast, secure, and resilient. ☁️ 𝐂𝐥𝐨𝐮𝐝 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 (𝐀𝐖𝐒) EC2, Lambda, S3, and CloudWatch setups designed for reliability and cost efficiency, backed by my AWS Certified AI Practitioner credential. 🏆 𝐋𝐈𝐍𝐔𝐗 𝐊𝐄𝐑𝐍𝐄𝐋 𝐌𝐀𝐈𝐍𝐋𝐈𝐍𝐄 𝐂𝐎𝐍𝐓𝐑𝐈𝐁𝐔𝐓𝐎𝐑 This is the part most Linux freelancers can't say: I've had patches merged into the actual Linux kernel. My work has included fixing how `vrealloc()` releases physical memory pages when shrinking allocations (it previously only updated bookkeeping), adding memory-shrinking support to a Rust kernel data structure, and a related optimization in the Rust binder driver, plus hardware-specific display/backlight driver fixes. The work was reviewed and signed off by core Linux maintainers, including Andrew Morton, the longtime maintainer of the kernel's memory-management subsystem. In practical terms: if your issue is below what a typical sysadmin can diagnose, an odd kernel panic, a memory leak invisible to application logs, a misbehaving driver, I can read the kernel source and actually fix it. 🌟 𝐖𝐇𝐀𝐓 𝐂𝐋𝐈𝐄𝐍𝐓𝐒 𝐒𝐀𝐘 🌟 ❝ Working with Shivam was a fantastic experience. His expertise in performance-oriented languages like Rust and C++ was a game-changer for our project. He delivered a highly efficient and meticulously optimized solution, demonstrating a rare talent for deep, logical problem-solving at the systems level. What impressed me most was his ability to connect this low-level expertise with high-level strategic thinking. He doesn't just understand the algorithms; he has the foundation to make them run incredibly fast. Highly recommend for any demanding technical role. ❞ - Client ❝ great to work with ❞ - Adam C. ❝ Shivam was amazing. This was my second time using him for a project and I was extremely happy. I will definitely be going back to him for any new projects. ❞ - Salman L. ➤ 𝐑𝐄𝐀𝐃𝐘 𝐓𝐎 𝐅𝐈𝐗 𝐀𝐍𝐃 𝐇𝐀𝐑𝐃𝐄𝐍 𝐘𝐎𝐔𝐑 𝐈𝐍𝐅𝐑𝐀𝐒𝐓𝐑𝐔𝐂𝐓𝐔𝐑𝐄? Looking for a Linux system administrator, DevOps engineer, or Cloudflare specialist who understands systems from the kernel up? Message me on Upwork today. I typically respond within 6 hours and prioritize delivering production-ready results. 𝐓𝐎𝐎𝐋𝐒 & 𝐓𝐄𝐂𝐇𝐍𝐎𝐋𝐎𝐆𝐘 𝐋𝐢𝐧𝐮𝐱 & 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 - Linux Kernel (mainline contributor) - Ubuntu / Debian / RHEL / CentOS - systemd, Bash scripting - Networking & firewall configuration (iptables/nftables) - Server hardening & security - Performance debugging (strace, perf, ftrace) 𝐃𝐞𝐯𝐎𝐩𝐬 & 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 - Docker - Terraform - CI/CD (GitHub Actions, GitLab CI, Jenkins) - Ansible - Monitoring (Prometheus, Grafana) 𝐂𝐥𝐨𝐮𝐝 & 𝐄𝐝𝐠𝐞 - AWS (EC2, Lambda, S3, CloudWatch, SageMaker) - Cloudflare (Workers, DNS, CDN, WAF, Zero Trust) - AWS Certified AI Practitioner 𝐏𝐫𝐨𝐠𝐫𝐚𝐦𝐦𝐢𝐧𝐠 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 - Rust - Python - Node.js / TypeScript - Bash 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬 - PostgreSQL - MongoDB - Redis Linux System Administrator, Linux System Administration, Linux Kernel Developer, Linux Server Management, Linux DevOps, DevOps Engineer, Senior DevOps Engineer, Cloudflare

⚡ Top Rated Plus · 🌟 100% Job Success · 🕒 3,400+ hours 🛡️ AWS Certified Security – Specialty 🛡️ Microsoft Certified: Cloud and AI Security Engineer Associate (SC-500) 🛡️ Oracle Cloud Infrastructure Security Professional I build and secure production cloud platforms on AWS, Azure, and OCI — and I audit fintech environments for PCI DSS certification. Terraform, Kubernetes, GitOps, done properly and documented. WHAT CLIENTS HIRE ME FOR: ✅ Production platform builds — private EKS / AKS / OKE, ECS Fargate, modular Terraform & Terragrunt, ArgoCD GitOps ✅ Cloud security & compliance — WAF, SIEM/SOC integration, IAM hardening, penetration-test remediation, PCI DSS / HIPAA readiness ✅ CI/CD engineering — GitHub Actions with OIDC (zero stored credentials), blue/green deployments, Trivy security gates ✅ PCI DSS cloud auditing — I work with a security assessment firm preparing payment-industry AWS environments for QSA certification RECENT WORK (client names under NDA): 🔹 Complete AWS platform for a fintech/payments company — private EKS on Fargate, ArgoCD GitOps, WAF + Network Firewall, Wazuh SIEM, encrypted RDS/Redis/RabbitMQ, payment-partner VPN connectivity. Remediated their external penetration-test findings. 🔹 Enterprise Azure hub-and-spoke platform for a US healthcare company — 20+ reusable Terraform modules, AKS with workload identity (zero stored credentials), Trivy-gated GitOps pipelines, full security audit with 45+ findings triaged. 🔹 22-service ECS Fargate platform for a real-time market-data SaaS — blue/green CodeDeploy, custom deployment tooling, OpenTelemetry observability, market-open autoscaling. 🔹 OCI platform build for a workforce-verification SaaS — OKE Kubernetes, Terragrunt/OpenTofu, workload identity, Cloud Guard, full handover documentation. 🔹 PCI DSS audit & remediation for two payment-processing clients — CIS benchmarking, audit logging with CloudWatch + auditd, KMS-encrypted session logging, QSA evidence preparation. WHY CLIENTS KEEP ME AROUND: Multiple engagements ran 1,000+ hours. 0–4 hour response time. "Professional, skilled, and reliable" — real client feedback. I don't just ship infrastructure — I document it, secure it, and hand it over so your team can run it. 🧰 Core stack: AWS · Azure · OCI · Terraform · Terragrunt · Kubernetes · Helm · ArgoCD · Docker · GitHub Actions · Jenkins · GitLab CI · Prometheus · Grafana · Wazuh · Python · Bash 📜 AWS Certified Security – Specialty (valid through 2028) · Oracle Cloud Infrastructure Security Professional — scored 98% (valid through 2028) · Microsoft Certified: Cloud and AI Security Engineer Associate (SC-500) 💬 Tell me about your cloud environment — happy to start with a quick architecture or security review.

Certifications: Linux Professionals Institute - LPIC-1 AWS Certified SysOps Administrator - Associate AWS Certified DevOps Engineer - Professional I am a Senior DevOps / Cloud Infrastructure Engineer specializing in AWS architecture, production reliability, compliance readiness (SOC 2 / ISO 27001), and scalable multi-environment infrastructure. I help startups and growing SaaS companies stabilize, secure, and scale their AWS environments — often stepping in to audit, fix, and modernize existing infrastructure. To date, I have: • Designed and restructured multi-account AWS environments (dev/staging/prod isolation) • Built and maintained ECS Fargate production clusters • Migrated legacy servers to containerized workloads • Implemented Terraform-based Infrastructure as Code across multiple organizations • Led SOC 2 readiness initiatives including security hardening and risk remediation • Recovered unstable production systems under live traffic AWS Architecture (Advanced) • Multi-account architecture (Organizations, SCPs, IAM boundaries) • ECS Fargate, EC2, ALB/NLB, Auto Scaling • RDS (Aurora Serverless v2), MySQL/Postgres optimization • S3, CloudFront, WAF, Route53 • VPC design, subnet isolation, NACL hardening • Secure parameter management (SSM, Secrets Manager, KMS) • CloudWatch monitoring, alerting, log aggregation DevOps & Automation • Terraform (modular, environment-aware design) • GitHub Actions & CI/CD architecture • OIDC-based GitHub → AWS authentication • Ephemeral preview environments per PR • Blue/Green & zero-downtime deployments • Docker production optimization • Cost optimization & AWS spend audits Security & Compliance • SOC 2 Type I / II preparation • IAM least-privilege design & MFA enforcement • Encryption at rest & in transit (KMS, TLS policies) • Secrets rotation & audit logging • Risk assessments & remediation roadmaps • Security architecture documentation Databases & Data Operations • Production MySQL / Postgres migrations • CouchDB clustered deployments (n=3, q=8) • Shard recovery & disaster recovery planning • Backup validation & restore testing • Schema migrations (Alembic, Laravel, etc.) I do not apply superficial fixes. I audit environments thoroughly, document risk exposure, and implement long-term infrastructure improvements designed for scalability, security, and operational clarity. If you need a senior-level DevOps engineer who understands production systems, compliance pressure, and business continuity, I would be glad to assist.

Professional Summary: Over 20 years of experience with GNU/Linux distributions and 10+ years delivering custom enterprise IT solutions. For the past 5 years, I have specialized in the architectural design, deployment, maintenance, and monitoring of on-premise infrastructures, managing complex networking and critical self-hosted services to ensure corporate data sovereignty. I approach every deployment not only from the software layer, but with a deep understanding of the underlying physical hardware and network topology. I have a proven track record of absolute long-term reliability and multiple client rehires, including over 1,200 hours on a single continuous contract. My technical and strategic focus prioritizes security, system resilience, and the automation of operational processes to minimize risk and optimize infrastructure costs. Areas of Expertise & Tech Stack: Bare-Metal Management & Virtualization: Deployment, configration, thermal optimization, and administration of high-performance servers. Stack: GNU/Linux (Debian, Ubuntu, Archlinux), Proxmox VE, Unraid, VMware ESXi, Qemu/KVM. Advanced Networking & Perimeter Security: Design of secure topologies, VLAN segmentation, traffic optimization, and failover/load balancing strategies in remote or hard-to-reach environments. Stack: Mikrotik (RouterOS), pfSense, OpenWRT, WireGuard, OpenVPN, Tailscale, Zerotier. Container Orchestration & CI/CD: Microservices architecture and pipeline implementation to automate the software lifecycle. Stack: Docker, Docker Compose, Portainer, Gitea Actions, Sonatype Nexus. Data Sovereignty & Enterprise Self-Hosting: Deployment of private solutions under strict privacy regulations and proactive monitoring. Stack: Gitea, Nextcloud, Bitwarden, Vaultwarden, Alloy, Prometheus, Loki, Grafana. Business Continuity & Disaster Recovery: Design of automated and immutable backup architectures. Stack: BTRFS, AWS S3, Backblaze, Restic. Centralized Authentication (SSO): User management, permissions, and integration across on-premise, hybrid environments, and corporate domains. Stack: OpenLDAP, Active Directory, MS Entra. Key Achievement: Disaster Recovery Under Extreme Conditions During the onset of the 2022 geopolitical crisis, a physical data center was trapped in an active conflict zone in Eastern Europe, facing an imminent risk of destruction without prior warning. I planned and remotely executed the emergency migration of the entire infrastructure to Hetzner cloud within 7 days, while the hardware was being dismantled on-site under the constant threat of bombardment. I improvised a temporary network topology and a high-availability cluster with minimal downtime. The Result: Zero loss of corporate data. Months later, after the hardware was extracted across international borders, I remotely coordinated the re-architecture, the physical hardware deployment, and the data repatriation to a new, secure data center within the European Union. Available Services: I am open to working as an independent consultant or integrated into your team in the following capacities: • Planning, deployment, and configuration of new on-premise or hybrid infrastructures. • Maintenance, scaling, improvement, and migration of existing infrastructures. • Technical resolution of complex issues and security audits. • Long-term B2B strategic consulting. My goal is to provide a robust technological foundation that allows your resources to scale without compromising performance, stability, or information security.