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KVM Virtualization specialists
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Qian J.
Shenzhen, China
Highly experienced and skilled in linux system, linux kernel and linux system programming. I had served in NXP semiconductor for 7 years, and worked in linux field for more than 15 years.
Linux Kernel
- Subsystem: KVM Virtualization, Filesystem, Network, USB, Linux Video
- Debugging: Performance, System Analysis, Software Debugging, OOPS
Embedded Linux
- Frameworks: OpenWRT, Yocto, Android
- Device Driver: USB, XHCI, WIFI, LTE, Network, Camera
Linux System Development
- System: Ubuntu, Centos, Archlinux, Raspberry pi, Orange pi
- Network: VPN, VXLAN, IPTABLE, Router, Wireguard
- Virtualization: Qemu, Libvirt, Virtualbox, Docker, K8s
Programming Skills
- C/C++
- Bash/Makefile
- Android
- Python
- C
- Embedded Linux
- Embedded C
- Linux
- Kernel
- Kernel-based Virtual Machine
- Cloud Computing
- Troubleshooting
- Performance Optimization
- System Programming
- Linux System Administration
- Network Engineering
- Golang
- Ubuntu
- Private Cloud
Felipe P.
Santo Domingo, Dominican Republic
Telecommunication and Systems engineer with a focus on Cloud, Networking and Linux, experience in Infrastructure management and deployment.
Deployed Private Cloud infrastructure, Datacenter Network Design for Multi-tenancy, fault-tolerant design, NIC Bonding and VRRP for High Availability.
Stack:
*Full virtual networking with vSwitches and vRouters
*VLAN, VxLAN, GRE and Overlay tunnels
*IPv6
*MP-BGP, EVPN
*Firewalling
*VPN/OpenVPN/IPSec/WireGuard/Site to Site and Client-Server
* VPP/DPDK for 100G VPN and routing
*Advanced Linux management: IPTables, Kernel modules, Virtualization, Networking.
*Traffic engineering
*Advanced StrongSwan IPSec tunnels, XFRM
*Cloudstack with Open vSwitch
*OpenNebula with Open vSwitch
*OpenDaylight SDN controller with OpenvSwitch
*Advanced Proxy setup with Squid/Nginx
*Virtuozzo and OpenVZ
*KVM and Libvirtd / Proxmox
*MicroVM Managment / Firecracker
*RADIUS and FreeRADIUS
*Pacemaker/Corosync/Keepalived HA cluster
*MTLS design and implementation with NGINX
*IoT gateway implementation with Raspberry Pi and 4G modems
*DevOps experience with Chef and Ansible
*Bash and Python scripting
- VPN
- Network Engineering
- Internet Protocol Security
- Linux
- Network Security
- Ubuntu
- Firewall
- System Administration
- Kernel-based Virtual Machine
- Private Cloud
- Computer Network
- OpenVPN
- Linux System Administration
- Apache CloudStack
- Internet of Things
Greg G.
Aurora, United States
I specialize in infrastructure using terraform on aws and proxmox as well as kubernetes via flux in IaS environments.
I have 21 years of general linux experience with apache, php, bash, python and various other scripting/programming languages.
I have 7 years of expert level experience using memcache/redis and nginx application accelerator proxies based on Redhat and Ubuntu with php-fpm, apache, nodejs, java, .net and other application servers. These include zend, wordpress, drupal and several other web software suites.
In one of my previous projects I was been able to allow for up to 40,000 simultaneous user sessions across twenty apache application servers utilizing nginx reverse proxies, behind several F5 load balancers. Initial hardware was able to accommodate up to 4,000 users. Since the application was not stateless nor was it designed for data segregation between private/public data the nginx rulesets were very complex requiring rewrites, header injections/strips and even body regex find/replaces.
I also have expert level experience with large scale wordpress clusters from the file service and db aspects.
I have experience with appdynamics, nagios and large scale ELK logging.
I have experience with AWS, especially linux EC2 containers, elastic beanstalk and cloudformation.
I am highly skilled in troubleshooting complex multi-tier interaction issues using system logs, stack traces and wireshark packet traces.
- PHP
- NGINX
- Redis
- Apache CouchDB
- Ubuntu
- Apache Nutch
- Memcached
- Linux System Administration
- Red Hat Administration
- PfSense
- HAProxy
Ahmed H.
Istanbul, Turkey
🔹Highly skilled IT Specialist with premier support capabilities.
🔹Efficient communicator in English.
🔹Unwavering commitment to responsiveness.
🔹Over a thousand hours logged on Upwork.
🔹Successfully completed more than 60 projects on Upwork.
🔹Bringing 22 years of IT experience to the table.
🔹Available full-time and open to relocation.
As a certified System Administrator, Developer, Programmer, and Project Manager, I am the professional you seek assistance from. I hold LPI (101 & 102) and RHCE certifications and have a well-rounded skill set in the IT sphere, from automation to development across mobile, desktop, and web platforms.
Over the past 15 years, I've acquired significant experience across a broad spectrum of software and systems. Notably, my skills include:
1. **Linux System Administration**: I've worked with numerous Linux systems since 2006, starting with Fedora, then CentOS and Ubuntu, managing their installation, configuration, and maintenance.
2. **Scripting**: I take immense pleasure in scripting, particularly for automation. I've honed my skills in Linux (bash) and Windows (AutoIT - batch) scripting, automating tasks even without command-line interfaces.
3. **Hosting Services**: I am proficient in handling various control panels for hosting and administration like cPanel, Plesk, ISPconfig, Webmin, Usermin, AWS, DigitalOcean, and Rackspace, among others. I can also manage standalone software like Apache, MySQL Server, and other servers.
4. **VPN Services**: I've installed and configured servers for VPN services, including PPTP and OpenVPN, and developed custom control panels for clients. I am proud to be the solo developer of vpnplatform (vpnplatform.org/team).
5. **Malware Mitigation**: I can clean your Windows systems of malware and secure them effectively. I've even developed an app, "Automated Malware Wizard," for comprehensive malware cleaning and system updating.
6. **Networking**: As a former ISP CEO, I delivered internet services to over 200 local subscribers at Hamad ISP.
7. **VOIP**: Experienced in Asterisk and Asterisk GUI installations.
8. **Virtualization**: Proficient with VMware and VirtualBox, complementing my hosting service capabilities.
9. **Email List Management**: I can effectively manage and clean your email lists, ensuring they stay away from SPAM lists.
10. **Web Development**: Proficient in HTML/CSS/PHP/MySQL/JavaScript for web page development.
11. **Other skills**: Experience with Oracle Databases, Android, and Java programming.
I am always available for contact via email, SMS, or phone call, and ready to relocate if needed. I respect my work, ensuring confidentiality while dedicating my utmost effort.
As the leader of a team of IT specialists, I can provide a holistic solution to your IT needs, from mobile to web development. Our mission is to deliver beyond your expectations.
Please note: I am flexible with my availability and open to relocation. Currently, I reside in Istanbul, Turkey.
Best regards,
Ahmed Hamad
- CentOS
- Ubuntu
- Terraform
- Network Administration
- Linux System Administration
- Virtualization
- Amazon ECS
- OpenVPN
- Technical Support
- Jenkins
- Network Monitoring
- Zabbix
- Docker
Chis R.
Cluj-Napoca, Romania
System administrator for various Linux distributions, database and network administrator. Managing complex deployments for python, php, java and nodejs.
Security technology specialist with over 15 years of experience in wide areas of network engineering and management, cyber and systems security, software and web development, cloud computing. Dedicated to improving critical thinking and providing best solutions and results. Able to adapt to changing priorities and maintain a positive attitude and strong work ethics.
* Worked on various vpn implementation project for financing and banking industry (payment gateways, SIP implementation, etc.), gateway and remote access for both Unix and Windows servers
* Experience with various vpn platforms (pfsense/opnsense, vyatta, vyos, openvpn, wireguard, shadowsocks, Unix based vpn, etc.)
* PCI compliance specialist, able to deliver quality in short time
* Strong troubleshooting network and routing problems skill
* ElasticSearch cluster and replication, logstash, kibana and indexing strategies specialist
- NGINX
- Network Engineering
- Linux System Administration
- Email Security
- Database Administration
- VPN
- Load Balancing
- Elasticsearch
- Server
- Configuration Management
- Search Engine Optimization
- Information Security
- SEO Backlinking
- Docker
- Kernel-based Virtual Machine
Roman V.
Bishkek, Kyrgyzstan
Feedback:
💭 "Roman has a vast knowledge of what he is doing and really good at what should be done"
💭 "He has good social skills; is patient and a good communicator. His skills are very much in demand"
💭 "If some solution does not work or is not possible Roman will find another way to get the task done"
💭 "His research is solid, resulting in a good overview of possibilities to (re-)direct the project"
Expertise:
Streaming & Multimedia:
📺 Media applications (ffmpeg, gstreamer, opencv)
🎛 Media services (kurento, mediasoup, janus, wowza)
📹 Streaming protocols (webrtc, hls, dash, rtmp, rtsp)
🧩 Codecs and Muxers (h.264/avc, h.265/hevc, av1, vp9)
📐️ GPU programming (opengl, opencl, cuda, vulkan, hip)
📠 IP Telephony (asterisk, freeswitch, sip, voip)
DevOps & Cloud & IoT:
☁️ Cloud Infrastructure (aws, ansible, terraform, kubernetes)
⛓ Build and test automation (jenkins, gitlab, ci/cd pipelines)
🔗 Tunneling protocols (openvpn, wireguard, gre, ipsec)
🧶 Bulk networking (dpdk, bpf/ebpf, xdp)
📦 Virtualization (kvm, qemu, crosvm, virtio)
🔋️ IoT / Embedded (raspberry pi, jetson, nordic, ble)
💻️ Linux deployment (containers, docker, yocto)
Software development:
🐍️ Python (flask, asyncio, fastapi, websockets)
🍀️ C/C++ (qt, cmake, meson, kernel, ndk, maths)
⚙ Rust (cargo, actix, tokio, rayon, solana)
🛠 Reverse engineering (disassembling, protocols)
- C
- Embedded Linux
- C++
- Python
- DevOps
- Amazon Web Services
- Rust
- GStreamer
- Internet of Things
- Video Processing
- CUDA
- Docker
- FFmpeg
- Kernel
- WebRTC
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