I am a certified professional with unique skillset and profound knowledge of DBA, Solution Architecture, SysOps and DevOps. With over 15 years of hands-on experience, I am designing, building, managing and optimizing various databases and environments for Startups, SMBs and Fortune 100 Enterprises from different industries. Reviews have it!
✅ DBA Expertise:
𝐃𝐁 𝐀𝐝𝐦𝐢𝐧𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐨𝐧: Oracle 9i, 10g, 11g, 12c - 19c on premise and in Cloud, MS SQL, PostgreSQL, MySQL, SQL Server, and more.
𝐂𝐥𝐮𝐬𝐭𝐞𝐫𝐰𝐚𝐫𝐞: Automatic Storage Management (ASM), Real Application Clusters (RAC)
𝐎𝐫𝐚𝐜𝐥𝐞 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐞𝐝 𝐒𝐲𝐬𝐭𝐞𝐦𝐬: Exadata, ZDLRA, Exalogic, ODA
𝐌𝐢𝐝𝐝𝐥𝐞𝐰𝐚𝐫𝐞 𝐚𝐧𝐝 𝐄𝐑𝐏 𝐚𝐝𝐦𝐢𝐧𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐨𝐧: NetSuite, Oracle E-Business Suite, Weblogic Server, Apache Tomcat, Glassfish, OBIEE, Discoverer, Fusion Middleware, OAM/IDM
𝐄𝐧𝐭𝐞𝐫𝐩𝐫𝐢𝐬𝐞-𝐜𝐥𝐚𝐬𝐬 𝐁𝐚𝐜𝐤𝐮𝐩, 𝐑𝐞𝐜𝐨𝐯𝐞𝐫𝐲 𝐚𝐧𝐝 𝐑𝐞𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧: RMAN, Dataguard, Golden Gate
𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭, 𝐒𝐜𝐫𝐢𝐩𝐭𝐢𝐧𝐠, 𝐚𝐧𝐝 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧: bash, SQL, PL/SQL, Python
𝐂𝐥𝐨𝐮𝐝 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬: Oracle Cloud, AWS, Azure
𝐒𝐲𝐬𝐭𝐞𝐦 𝐀𝐝𝐦𝐢𝐧𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐨𝐧: Unix and Linux, Windows (on premise or in Cloud)
✅ DevOps, SysOps Expertise:
𝐒𝐲𝐬𝐭𝐞𝐦 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠: Scalable, secure, and highly available designs tailored to business needs.
𝐒𝐲𝐬𝐎𝐩𝐬 & 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞: Managing virtual machines, containers, storage, backup, migration, networking, and databases.
𝐃𝐞𝐯𝐎𝐩𝐬 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧: CI/CD, infrastructure as code (IaC), tools like Jenkins, GitLab CI/CD, Azure DevOps, etc.
𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲 & 𝐂𝐨𝐦𝐩𝐥𝐢𝐚𝐧𝐜𝐞: Data encryption, access control, IAM, GDPR, HIPAA, PCI-DSS compliance.
Choosing me as your IT Architect, DBA, SysOps, and DevOps Engineer means you gain a trusted partner who will go the extra mile to deliver exceptional results and help your organisation thrive.
Let's discuss your requirements and get you the best solution. Contact me today!
Oracle Database
SQL
Database Administration
Solution Architecture
Database Architecture
Cloud Architecture
Azure DevOps
Amazon Web Services
Oracle Cloud
Oracle E-Business Suite
Linux
Enterprise Software
Python
Kubernetes
Git
Vipin G.
Jaipur, India
$15/hr
4.5
104 jobs
IT Expert with 8+ years of experience in Managing Windows and Linux-based server infrastructures, Network security and administration, and software solutions.
Here are some major services on which I am working:
☑️- Server Administration :
✔️ Windows server :
Intune , ADDC, DNS, DHCP, WSUS, Group Policy Management, RDP Server, WDS Server, IIS Server, MS Exchange Server, MS SharePoint, MS Office 365, MS One Drive, MS Teams, File Server (NAS & SAN) , FTP, NTP and many more
✔️ Linux Server :
SAMBA ADDC LDAP, SAMBA File Server, DNS, DHCP, Mail Servers (Zimbra, PMTA, Send grid, Squirrel mail, Roundcube). Web Servers (Tomcat, apache, nginx, light speed), MySQL, MariaDB, Postgres, FTP, NTP, Ticketing tools (Manage engine, OS ticket, OTRS Ticket, Citrix XenApp, JIRA, Service now), Monitoring Tools ( Check_mk, Syslog, Nagios, Cacti, ELK Stack, Zabbix, PRTG), IDS Server ( OSSEC, WAZUH, SNORT, Suricata, BRO, Tripwire, Security Onion), DLP/Encryption/ Threat Prevention Server ( Symantec, Sophos, McAfee), Threat Intelligence server (MISP, Mitre, OpenCTI), The Hive with Cortex, ArcSight Server, Dialer Server ( VCdialer, go autodialer, ViciBox, Altitude Dialer), Virtaul Hypervisor ( VMware ESXi, Proxomox, Virtual Box, VMware Workstation), GenieACS TR-069 remote management server, Vulnerability Assessment Scanner Tools (OpenVAS, Nessus Professional, Wireshark, Comodo cWatch, Tripwire IP360) , SonarQube Code analysis Tool, NXfilter URL Filtering tool and Many More..
☑️- Network Administration:
Key Network Skills & Security Products Experience:
o Firewall – Checkpoint, Cisco ASA, Palo Alto, Fortigate, Sophos,
o Router & Switches : Cisco, Mikrotik, Ubiquiti, Netgear, Aruba
o Intrusion Detection & prevention – Cisco, Checkpoint, Sophos
o Switching: Vlan, Inter Vlan, Stp, Vtp, EtherChannel, Switch Port
o Configuration and troubleshooting of routing protocols OSPF, RIP, EIGRP, BGP
o Setup of security implementations (Filtering Tool ACL, route map, port security.)
o Well versed in the operations, configuring, and troubleshooting of various issues in Checkpoint and Cisco, Mikrotik, Ubiquiti, Netgear & and Aruba Devices.
o Checkpoint IPSec VPN Blade, Application & URL filtering Blade, IPS Blades,
o Configuration & troubleshooting of IPSEC and S2S VPN
☑️- Information Security
I help organizations stay compliant with all the important standards like PCI DSS, HIPPA, ISO 27001, GDPR, FISMA, and GLBA. In addition to these compliances, I also help companies with Information Security Assessments and Penetration and vulnerability Testing for identifying loopholes in their security infrastructure and BCP/DR consulting for building programs to stay ahead of future security incidents.
☑️- Cloud Solutions:
I Help organizations to deploy their services on AWS, GCP, and Microsoft Azure cloud & Freshservices.
Projects not for me:
✖Asking to hack/crack/access someone else accounts, systems, social media, etc
Network Security
Network Administration
Managed Services
Amazon Web Services
Microsoft Azure
Technical Support
Linux System Administration
Remote IT Management
Security Management
Google Workspace Administration
Freshworks CRM
Microsoft Server
Microsoft Certified Information Technology Professional
Microsoft Endpoint Manager
Arnel A.
Cebu City, Philippines
$10/hr
5.0
6 jobs
Experienced Systems Administrator with expertise in Windows and Linux administration, Microsoft 365, Identity and Access Management (IAM), virtualization, networking, cybersecurity, infrastructure monitoring, and cloud-native technologies including Docker and Kubernetes. Passionate about building secure, reliable, and scalable IT infrastructure.
Core Expertise
Identity Access Management (IAM)
• User provisioning, de-provisioning, and role-based access management using Okta, Keycloak, and Microsoft Entra ID.
Systems Administration
• Windows Server, Linux, Active Directory, Group Policy, and Microsoft 365 administration.
Cloud-Native & Automation
• Docker, Kubernetes, Git, Bash scripting, and Ansible automation.
Virtualization & Infrastructure
• VMware, Hyper-V, Proxmox, KVM, and VirtualBox.
Security & Monitoring
• Security hardening, Wazuh, Grafana, Prometheus, backup, and infrastructure monitoring.
Networking
• Cloudflare, Nginx Proxy Manager, DNS, SSL, reverse proxy, and network troubleshooting.
I can help you deploy, secure, automate, and maintain reliable IT infrastructure across Windows and Linux environments. Whether you need system administration, IAM, security, or cloud-native support, I am committed to delivering practical and dependable solutions.
System Administration
Linux System Administration
Windows Server
Microsoft Active Directory
User Identity Management
Network Administration
Docker
Kubernetes
Bash
Microsoft Azure Administration
Cloudflare
Ansible
IT Infrastructure
Technical Support
Virtualization
Server Administration
Network Security
VMWare
Microsoft Azure
Daman P.
Sahibzada Ajit Singh Nagar, India
$25/hr
4.8
47 jobs
Over 10+ years of experience in IT industry, involving in Software Design, Analysis, Development integration and Testing at client and server side in various domains such as transport, finance, etc.
My Skills:
• Experience in .NET Framework/Core
• Experience in Frontend Development using Angular, Blazor, Razor
• Experience in VB.Net CRM Development
• Experience with C# 10 and .NET 6 and earlier versions
• Experience in React, Node, HTML5, JavaScript and CSS
• Windows desktop application development experience
• Experience with Windows and WCF services development
• Experience in Microservice API and REST services and understanding of containers
• Experience with WPF GUI Modular application development
• Practical experience using MVVM design pattern and DevExpress WPF controls
• Exposure in multi-process .NET applications
• Relational database experience MySQL & SQL Server
• Understanding of message queues and middleware.
• Experience with SDLC tools, like Jira, bitbucket, bamboo Confluence, GIT source control system
• XAML-based user interface development experience (e.g., WinUI 3, UWP, WPF)
• Experience with LINQ to XML
• Understanding of XML schemas (XSD)
• Attentive to user feedback
• Ability to work independently
• Git version control
• Solid understanding of testing principles and high-quality software
• Excellent written and verbal English communication skills.
Worked in an Agile team of .NET developers for a fast-paced software development firm.
Worked on 10+ SQL database design projects. Improved speed to complete projects by 35% in 15 weeks.
Developed and provided maintenance for 20+ .NET websites/applications, using ASP.NET MVC, jQuery, HTML, and CSS. Achieved 100% client satisfaction and on-time completion.
Created remote coding and testing environment with bash and Docker scripts.
AJAX
HTML
Visual Basic
ASP.NET
C#
Payment Gateway Integration
Kentico
SAP Crystal Reports
AspDotNetStorefront
BigCommerce
Rajesh S.
Jaipur, India
$15/hr
4.5
46 jobs
IT Expert with 14+ years of experience in Managing Windows and Linux-based server infrastructures, Network security & Administration, and software solutions.
Here are some major services on which I am working:
☑️- Server Administration :
✔️ Windows server :
ADDC, DNS, DHCP, WSUS, Group Policy Management, RDP Server, WDS Server, IIS Server, MS Exchange Server, MS SharePoint, MS Office 365, MS One Drive, MS Teams, File Server (NAS & SAN) , FTP, NTP and many more
✔️ Linux Server :
SAMBA ADDC LDAP, SAMBA File Server, DNS, DHCP, Mail Servers (Zimbra, PMTA, Send grid, Squirrel mail, Roundcube). Web Servers (Tomcat, apache, nginx, light speed), MySQL, MariaDB, Postgress, FTP, NTP, Ticketing tools (Manage engine, OS ticket, OTRS Ticket, Citrix XenApp, JIRA, Service now), Monitoring Tools ( Check_mk, Syslog, Nagios, Cacti, ELK Stack, Zabix, xymon, PRTG), IDS Server ( OSSEC, WAZUH, SNORT, Suricata, BRO, Tripwire, Security Onion), DLP/Encryption/ Threat Prevention Server ( Symantec, Sophos, McAfee), Threat Intelligence server (MISP, Mitre, OpenCTI), The Hive with Cortex, ArcSight Server, Dialer Server ( VCdialer, go auto dialer, ViciBox, Altitude Dialer), Virtaul Hypervisor ( VMware ESXi, Proxomox, Virtual Box, VMware Workstation), GenieACS TR-069 remote management server, Vulnerability Assessment Scanner Tools (OpenVAS, Nessus Professional, Wireshark, Comodo cWatch, Tripwire IP360) , SonarQube Code analysis Tool, NXfilter URL Filtering tool and Many More..
☑️- Network Administration:
Key Network Skills & Security Products Experience:
o Firewall – Checkpoint, Cisco ASA, Palo Alto, Fortigate, Sophos,
o Router & Switches : Cisco, Mikrotik, Ubiquiti, Netgear, Aruba
o Intrusion Detection & prevention – Cisco, Checkpoint, Sophos
o Switching: Vlan, Inter Vlan, Stp, Vtp, EtherChannel, Switch Port
o Configuration and troubleshooting of routing protocols OSPF, RIP, EIGRP, BGP
o Setup of security implementations (Filtering Tool ACL, route map, port security.)
o Well versed in the operations, configuring, and troubleshooting of various issues in Checkpoint and Cisco, Mikrotik, Ubiquiti, Netgear & Aruba Devices.
o Checkpoint IPSec VPN Blade, Application & URL filtering Blade, IPS Blades,
o Configuration & troubleshooting of IPSEC and S2S VPN
☑️- Information Security
I helps organizations stay compliant with all the important standards like PCI DSS, HIPPA, ISO 27001, GDPR, FISMA, and GLBA. In addition to these compliances, I also help companies with Information Security Assessments and Penetration & Vulnerability Testing for identifying loopholes in their security infrastructure and BCP/DR consulting for building programs to stay ahead of future security incidents.
☑️- Cloud Solutions:
I Helps organizations to deploy their services on AWS, GCP, and Microsoft Azure cloud.
☑️- Website Development & Designing :
I helps organizations in website designing, development, internet marketing, hosting and support services, as well as web and mobile app development.
VMWare
CentOS
Ubuntu
Linux
Red Hat Enterprise Linux
DHCP
Linux System Administration
DNS
Microsoft IIS
Microsoft Office
Network Penetration Testing
GPO
OpenVAS
Configuration Management
Amazon EC2
Karthik R.
Chennai, India
$15/hr
4.7
84 jobs
✅ ABOUT ME:
I am a Professional Full Time Freelancer. I have 8+ years of experience working on Windows/Linux server administration, CICD Devops ,AWS, Azure, windows/Linux troubleshooting, HyperV, proxmox servers, DNS records mapping, IIS, Domains and DNS records management, active directory, web server, webhosting, databases administrations and Mail server implementations, administrations for the mail services MS Office365, Gsuite, Zimbara and postfix .
✅ WHY ME?
• Full-time Professional – I work on Upwork as a full-time freelancer. I take every project seriously and I am highly professional.
• Highly responsive – I’ll always get back to you in less than 02 hours.
• 100% Client satisfaction – I provide revisions and modifications even after our contract ends.
• I provide accurate solutions and just as important, I can guide you to future prospects and put your project on the right track.
• Good communication skills – You will find me very friendly to talk to.
=========================================
#Windows Servers - clients
#Linux Server - clients
#Web servers - IIS, Apache, XAMPP, Nginx and Tomcat
#Database Servers - MSSQL, ORACLE, MYSQL, MongoDB
#Webhosting tools- Plesk, cPanel and CWP
#Cloud services providers - AWS, Azure, GCP, Digital Ocean, World stream, OVH Cloud, Hetzner and Hosting raja
#Hosting providers - Hostinger, Bluehost, Namecheap, Godaddy, Bigrock and Hostgator
#Active Directory - setup, users creation, Centralized Management, policy creation and enhanced Security
#Troubleshooting - L1, L2
Tools used
==============
Github, SVN
IIS,Apache,Tomcat,Nginx , Apache Kafka and Wordpress
SSH, RDP, VNC, Anydesk, Splashtop and screen connect
Mobaxterm,Toad,SSMS and Workbench
Plesk,WHM,Cpanel
Active Directory, IAM
Servicenow, Redmine, Microsoft Teams and Slack
Previous Clients Feedback:
1- "Karthik was an exceptional Upworker to deal with. He was responsive, communicative, knowledgeable and proactive at solving my urgent technical issue (my businesses website was down for an unknown reason) and I wouldn't hesitate to recommend him to anyone else seeking an excellent technical support specialist. Thank you Karthik!"
2- "Karthik went above and beyond to progress with a very difficult issue in a very short period of time. He is kind, hard-working, and knowledgeable."
3- "I recently had the pleasure of working with "Karthik Raja" on installing PMB Software project, and I must say it was an outstanding experience from start to finish. I highly recommend "Karthik Raja" to anyone seeking top-notch freelancing services."
4- "he provides ideas to solve our problems he is a best gem have ever met. He focused only in customer satisfaction. no negative reviews."
So why wait? Just invite me to your job on Upwork so we can discuss how to make your project a success. Let’s work together and get it done!!
Thanks,
Karthik
Microsoft IIS
Microsoft Windows
System Administration
TortoiseSVN
Database Management
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