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I'm a professional Senior Linux Systems Engineer with over 14 years of hands-on experience in managing, securing, and optimizing Linux-based servers and infrastructure. If you're a startup, entrepreneur, web agency, or enterprise looking for rock-solid server performance, automation, and security, you're in the right place. I work closely with clients to build stable, scalable, and secure Linux environments What I Can Help You With: Linux Server Setup & Management: Debian, Ubuntu, CentOS, AlmaLinux, RHEL etc Installation, Disk partitioning, LVM, RAID, system hardening Performance tuning and troubleshooting Web Server Deployment: Apache2, Nginx, PHP-FPM, SSL/TLS, Let's Encrypt Virtual Hosts, Rewrite Rules, Reverse Proxy configuration Mail Server Configuration: Postfix, Dovecot, Zimbra, Roundcube etc SMTP, IMAP, SPF, DKIM, DMARC setup Email deliverability and spam protection DNS & Control Panels: BIND, PowerDNS, DNS record management Webmin, ISPConfig, CyberPanel, Virtualmin, Vestacp etc setups Cloud & DevOps Integration: Infrastructure automation using Bash and Ansible Server provisioning, patching, user/group management, cron jobs Experience with various cloud platforms Cloud server setup and management VPN & Proxy Services: Squid, 3proxy, WireGuard, OpenVPN, Anyconnect, PPTP, Ipsec IP rotation, IPv4/IPv6 support, authentication Monitoring & Logging: Zabbix, Nagios, Grafana, Cacti ELK Stack: Elasticsearch, Logstash, Kibana Virtualization & Containers: KVM, Proxmox, VMware ESXi Docker containers, Docker Compose, orchestration Database & Backup: MySQL/MariaDB setup, optimization, replication, backup & restore Rsync, Rclone, cloud/offsite backup strategies Custom backup scripting and automation If you’re looking for a trusted Linux expert to support or transform your infrastructure, let’s connect and discuss how I can help!

I keep business-critical systems running on Linux servers. Twelve years of experience. I cover a range of services, but it's really one discipline: infrastructure, that stays up. WHAT I DO Linux server administration. VPS setup, hardening, performance tuning, recovery, and ongoing care on AWS, DigitalOcean, Hetzner, Vultr, cPanel/WHM and others. Firewalls, SSL, backups, monitoring. The boring work that keeps everything else possible. Self-hosted automation and AI infrastructure. I deploy n8n on hardened Linux servers (Docker, reverse proxy, SSL, automated backups) so you own your automation instead of renting it. I also build private AI stacks with Ollama, OpenWebUI, and local or API-connected LLMs, for teams that want AI capability without handing their data to a third party. Website and email migrations. Files, databases, DNS, SSL and mailboxes moved cleanly between hosts. Hundreds completed over the years. The rule is simple: nothing breaks, nothing goes missing. WordPress and phpBB. Installs, fixes, malware cleanup, upgrades, long-term care. I've been a go-to phpBB specialist on Upwork for years, including an 18-month engagement keeping a production community forum healthy. WHY CLIENTS STAY Most automation specialists build on cloud platforms you don't control and can't leave. I build on infrastructure you own. Your server, your data, your system. And I treat it the way a sysadmin should: monitored, backed up, documented, and maintained so it keeps running after I hand it over. 100% Job Success across 149 jobs, repeat clients going back years, and work ranging from small business rescues to a LAMP/REST API deployment on AWS for an Upwork enterprise client. HOW I WORK I scope honestly before we start. If something is outside what I do (app development, SEO, design) I'll tell you upfront. Hourly with the Upwork tracker for open-ended work. Fixed price when the scope is tightly defined. If something I set up breaks within days of handover because of my work, I fix it for free. I'm flexible with times. Can work when the it is best for your project, e.g. off-peak hours. If your server, site, forum or automation needs to work every day and not just on launch day, message me and tell me what's going on.

Need a backend, full-stack, or AI system that holds up in production, not just on a demo branch? That's what I do. I'm a senior software engineer with 6+ years building web apps, desktop products, data platforms, and enterprise integrations for clients in the US, Canada, and Europe. Clients usually come to me with one of these problems: - "Our API is slow or falls over under load." I profile it, fix the queries and caching, and add retries, idempotency, and monitoring so failures stop reaching your users. - "We need a real product, not a prototype." Secure auth, roles and permissions, billing, background jobs, licensing, automated tests, and CI/CD are part of the build, not a phase two. - "We want AI over our own documents but it keeps answering wrong." I build RAG pipelines with hybrid search, reranking, and measured retrieval quality so answers are traceable. - "Our legacy mainframe code needs to run somewhere modern." I deploy and repair COBOL/CICS/DB2/JCL systems on z/OS and IBM Cloud. WHAT I WORK WITH Backend: .NET Core, Python, FastAPI, Node.js, REST APIs, Clean Architecture, CQRS, Kafka, MassTransit, SignalR, Hangfire Frontend: Angular, React, Next.js, TypeScript, RxJS, NgRx, Tailwind, Material UI Data: PostgreSQL, SQL Server, MongoDB, Redis, Qdrant, pgvector AI: RAG, LangChain, OpenAI, Cohere, hybrid vector + BM25 search, reranking, evaluation Cloud and DevOps: AWS, Azure, IBM Cloud, Docker, GitHub Actions, Azure DevOps, xUnit, pytest Mainframe: z/OS, COBOL, CICS, DB2, VSAM, JCL WHAT I'VE DELIVERED - A multi-tenant vendor risk platform covering supplier onboarding through audits and remediation, with enterprise SSO, granular permissions, Stripe billing, and AWS deployment. - Three years on a freight-forwarding ERP: 1,000+ endpoints, 25+ carrier and accounting integrations, and the full rate-to-shipment lifecycle. - A licensed Windows and macOS desktop product with signed entitlements, offline grace periods, and crash-recovery testing. - A multilingual vehicle-manual chatbot with intent classification and an automated retrieval-evaluation harness. - Technical leadership of a 6-developer team across architecture, estimation, and releases. HOW I WORK I plan carefully before writing code, clarify anything that is unclear, and provide an honest estimate before development begins. I will also tell you early if an approach is risky or unlikely to work. You will receive working increments that you can review throughout the project - not a month of silence followed by unexpected results. I always take ownership of project and meet the deadline I commit to. I have maintained a 100% Job Success Score and delivered more than 2,400 hours of work on Upwork. Some of my project details are in my portfolio and work history below. Send me your requirements, and I will reply with a clear technical approach, the main trade-offs, and a realistic delivery timeline.

Sr. DevOps Engineer With over 10 years of proven experience in the IT field, I excel at working with various technology domains. I am a senior DevOps engineer in the software development domain with top-tier organizations. I am responsible for efficiently managing and implementing on-premises and public cloud model infrastructure for application deployment, aiming to ensure optimal reliability and performance for the organization. I worked for about 4 years in the ISP organization as a system engineer managing Linux base systems configured email and web systems. I worked with ESXi with the NOC team managing the data center and configuring Zabbix, Nagios, and Cacti. Now I have been working for about 5 years as a DevOps Engineer in reputed software organisations. I have been working closely with developers to manage software life cycles using CI/CD processes. Also, I can configure AWS infrastructure according to the AWS Well-Architected framework, which guides the implementation of a robust, resilient, secure, and cost-optimized solution. I automate the manual process, which will reduce the time to manage and infrastructure complexity. Certification: AWS Certified Solution Architect, Certified Kubernetes Administrator, and Cisco Certified Network Administrator. Here you will get my technical skills: AWS Services: ALB, NLB, EC2, S3, ECS, EKS, Route53, Amplify, Lightsail, DMS, Redshift, ACM, KMS, RDS, ElasticBeanstalk, Elasticache, Opensearch, CloudWatch, WAF, GuardDuty, EFS, SES, SNS, Amazon Comprehend, VPN, VPC, CloudTrail, IAM, Lambda, CodePipeline, CodeBuild, CodeDeploy, ECR, Parameter store DevOps Tools: Docker, Kubernetes, Ansible, Terraform, Jenkins, Docker Harbor, GitLab CI, GitHub Action, Helm Observe ability, Monitoring & logging: ELK Stack, Prometheus and Grafana, Loki Web Systems: Apache, Nginx, IIS, Apache Tomcat Load Balancer: Nginx, HAProxy Databases: MySQL, PostgreSQL, MongoDB Scripting: Bash, Python Security: SSL, Linux file permission, Audit, PAM, Secure FTP, SSH security, SELinux Context, Firewall, Container Sandboxing, Kubernetes Security, AppArmor profiles, Kubernetes cluster Audit Operating Systems: Centos, RedHat, Ubuntu, Debian, Windows I implement on-premises infrastructure and cloud infrastructure for both monolithic architectures as well as microservices.

⭐⭐⭐⭐⭐𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐄𝐱𝐩𝐞𝐫𝐭 𝐨𝐧 𝐒𝐞𝐫𝐯𝐞𝐫, 𝐒𝐭𝐨𝐫𝐚𝐠𝐞, 𝐕𝐢𝐫𝐭𝐮𝐚𝐥𝐢𝐳𝐚𝐭𝐢𝐨𝐧, 𝐁𝐚𝐜𝐤𝐮𝐩 & 𝐃𝐢𝐬𝐚𝐬𝐭𝐞𝐫 𝐑𝐞𝐜𝐨𝐯𝐞𝐫𝐲, 𝐋𝐢𝐧𝐮𝐱, 𝐖𝐢𝐧𝐝𝐨𝐰𝐬, 𝐊𝐮𝐛𝐞𝐫𝐧𝐞𝐭𝐞𝐬, 𝐂𝐈/𝐂𝐃, 𝐃𝐞𝐯𝐎𝐩𝐬, 𝐌𝐮𝐥𝐭𝐢-𝐂𝐥𝐨𝐮𝐝 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭 🏆𝟏𝟐+ 𝐘𝐞𝐚𝐫𝐬 𝐨𝐟 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 | 𝐈𝐓 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞, 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦 & 𝐃𝐞𝐯𝐎𝐩𝐬 | 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭 I’m a 𝗣𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗲𝗱 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 & 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝘆 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁 with over 12 years of hands-on experiences on IT infra design, deployment, implementation, configuration, migration, support services with below key skill include - 🏆 Enterprise Storage, Server, Backup & Recovery Architecture and Implementation 🏆 Dell EMC, HITACHI, NetApp, HPE, IBM, Pure, Huawei, Lenovo, Fujitsu, SAN/NAS Storage, Administration, Replication, Migration Technologies 🏆 Backup Recovery solution with Commvault, Veritas NetBackup, Backup Exec, Veeam, Acronis, EMC Networker, Data Domain, Avamar, IDPA 🏆 System and Data Migration with SAN Copy, vMotion, P2V, V2P, Rsync, RClone 🏆 Cisco MDS and Brocade SAN Fabric / FC Switch 🏆 Rack and Modular Chassis Server Implementation and Administration 🏆 Synology, QNAP, TrueNAS, Isilon NAS Storage & Open Source Platform deployment 🏆 Linux/Unix, Ubuntu, CentOS Install, Update, File System, LVM, ACL, SSL, Apache, Nginx Web Server Configuration 🏆 Windows Server Install, Active Directory Domain Contoller, DNS, RDS, DHCP, FTP, Web Server, IIS, File Server, Failover Cluster configuration 🏆 Microsoft Hyper-V Install, Replication, HA Cluster, Nutanix, Proxmox, VirtualBox virtualization setup 🏆 VMware ESXi, vCenter Install, Virtual Machine, vSAN Cluster, HA Cluster, vMotion, Workstation setup 🏆 Oracle, MySQL, SQL Database configuration & management 🏆 Azure, GCP, AWS, IBM, OCI, DigitalOcean, Public Cloud resource management, AutoScaling, Load Balancer, VPC, Platform migration, configuration 🏆 Docker, Kubernetes cluster seup, container management, deployement, Azure DevOps, GitHub Actions, GitLab CI, Jenkins, ArgoCD, CI/CD pipeline 🏆 Network Switch, Router, Firewall, Gateway, Access Point, Wireless device configuration with Cisco, Juniper, Fortinet, MikroTik, D-Link, TP-Link, HPE Networking, Aruba, Avaya, Ubiquity, UniFi, Dell Networking PowerSwitch, F5, VPN, Proxy, Packet Tracer Network Design and Configuration 🏆 Batch, PowerShell and Bash Scripting ✅ ＭＹ ＣＯＲＥ ＥＸＰＥＲＴＩＳＥ 💾 Server, Storage & SAN ✔ Dell EMC PowerMax, VMAX, Unity, PowerStore, VxRail, Isilon/PowerScale ✔ Hitachi VSP, HNAS, G-Series, USP, HUS ✔ NetApp AFF, FAS, ASA, EF Series, StorageGRID ✔ HPE 3PAR, Nimble, Primera, Alletra, StoreOnce, MSA ✔ IBM FlashSystem, SVC, DS Series ✔ Pure Storage, Huawei OceanStor/Dorado, Fujitsu, Lenovo, Oracle ZFS ✔ SAN/NAS Design, Storage Migration, Replication, Performance Optimization ✔ Cisco MDS & Brocade SAN Fabric Administration 🗃️Backup, Disaster Recovery & Data Protection ✔ Commvault Backup & Recovery ✔ Veeam Backup & Replication ✔ Veritas NetBackup & Backup Exec ✔ Dell EMC Avamar, Networker, Data Domain, DPS ✔ Cohesity, Acronis, AWS/Azure/GCP Backup ✔ Kubernetes Backup using Kasten K10, Velero ✔ DR Design, Replication, Failover & Recovery Testing 🖥️Virtualization Infra ✔ VMware ESXi, vCenter, vSphere, vSAN, HA, DRS, vMotion ✔ Microsoft Hyper-V, Failover Cluster, Replication ✔ Nutanix AHV ✔ Proxmox VE ✔ P2V, V2V, Live Migration & Infrastructure Consolidation 🐧💻Linux & Windows System Administration ✔ Ubuntu, RedHat, CentOS, Rocky Linux, Debian ✔ Windows Server ✔ Active Directory, DNS, DHCP, IIS, RDS, File Server ✔ Apache, Nginx, SSL, LVM, ACL, Bash & PowerShell Scripting ✔ Server Hardening & Security Best Practice ☁ 𝗠𝘂𝗹𝘁𝗶-𝗖𝗹𝗼𝘂𝗱 & 𝗖𝗹𝗼𝘂𝗱 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀 ❒ Azure – AKS, AVM, App Services, App Gateway, Key Vault, Defender, Sentinel, SQL, Cosmos DB, Blob Storage, Functions, ExpressRout ❒ AWS – EC2, EKS, ECS, Lambda, RDS, DynamoDB, S3, CloudFront, Route53, API Gateway, CloudFormation, IAM, VPC, Direct Connect ❒ GCP – Compute Engine, GKE, Cloud Run, Cloud Functions, BigQuery, Cloud SQL, Firestore, Pub/Sub, Cloud Storage, VPC, VPC peering, Interconnect ❒ OCI – OKE, Compute, Autonomous DB, Exadata, Object Storage, FastConnect, Load Balancer, Vault ❒ Hybrid / Multi-Cloud Networking (VPN, ExpressRoute, Direct Connect, Interconnect) ❒ Hybrid & Multi-Cloud Architecture, Cloud Migrations & Disaster Recovery ⚙ 𝗗𝗲𝘃𝗢𝗽𝘀 & 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 ❒ CI/CD Pipelines: Helm, ArgoCD, GitOps, GitHub Actions, GitLab CI, Jenkins ❒ IaC: Terraform, Ansible, ARM, CloudFormation ❒ Docker & Kubernetes (AKS, EKS, GKE, OKE, On-Prem K8s) 🔐 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 & 𝗖𝗼𝗺𝗽𝗹𝗶𝗮𝗻𝗰𝗲 ❒ IAM, RBAC, Conditional Access, SSO, Key Vault / KMS ❒ Multi-Cloud Security Monitoring (Defender for Cloud, AWS GuardDuty, GCP SCC) ❒ Compliance (SOC2, NIST, ISO 27001, HIPAA, PCI DSS) ❒ DevSecOps & Automated Security Scanning 👉 Let’s connect!

I am a Senior Software Engineer with 15+ years of experience building, maintaining, optimizing, and deploying enterprise-grade software applications and database systems. My strongest areas are C#, ASP.NET, ASP.NET Core, .NET, REST APIs, Oracle Database, SQL Server, PostgreSQL, Docker, Kubernetes, Linux, and CI/CD. I can help businesses with both new application development and existing system modernization, maintenance, performance optimization, and production support. What I can do for you Software Development C# and ASP.NET / ASP.NET Core application development Enterprise web applications REST API development Backend development and integration Microservices and distributed applications Application modernization and migration Bug fixing and performance optimization Third-party API and system integration Database Oracle Database development and administration Oracle RAC and high-availability environments SQL development and optimization Database performance tuning Database design and troubleshooting Backup and recovery SQL Server and PostgreSQL Database migration and integration DevOps & Deployment Docker and Docker Compose Kubernetes CI/CD pipelines Jenkins Git / GitLab Linux server environments Application deployment and production troubleshooting Monitoring and infrastructure automation Why work with me? I have experience working with large-scale enterprise systems where reliability, performance, security, scalability, and availability are critical. My advantage is that I can work across the complete application stack—from backend development and APIs to databases, deployment, and production troubleshooting. This allows me to investigate problems beyond a single application layer and provide practical end-to-end solutions. I am comfortable working independently, collaborating with existing development teams, or taking responsibility for specific development, database, or DevOps tasks. Core Technologies Development: C#, ASP.NET, ASP.NET Core, .NET, REST APIs, Microservices, Angular Databases: Oracle, Oracle RAC, SQL Server, PostgreSQL, MySQL, Redis, Elasticsearch DevOps: Docker, Kubernetes, Jenkins, Git, GitLab, CI/CD, Linux, Ansible If you are looking for an experienced developer who can build, improve, troubleshoot, and deploy enterprise applications, I would be happy to work with you.