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Serhii V.

Rivne, Ukraine

$55/hr
5.0
197 jobs
Servers administration, security hardening, malware cleanup, prevention of hackers intrusion, DevOps, DNS, email, web hosting setup, migration, troubleshooting, recovering, monitoring, automation, scripting, supporting, writing documentation. 5+ years on Upwork, individual freelancer. I offer reasonable services in areas: Security: • malware cleanup, websites recovery; • penetration testing; • security hardening for servers and websites; Web hosting: • websites migration and web hosting setup; • hosting optimizing for speed and security, troubleshooting; • DNS configuration and troubleshooting, Cloudflare automation; • setup and support hosting panels (Plesk, cPanel/WHM, HestiaCP, DirectAdmin etc); • deploy and support various CMS (WordPress, Drupal, Typo3 etc); • cloud hosing (VPS) setup and automation (DigitalOcean, Linode, Hetzner, Vultr etc); DevOps and Clouds: • automation scripting with Bash, PowerShell; • clouds service and infrastructure setup (GCP, AWS, Azure); • virtualization (Proxmox VE, Hyper-V, XEN); • Docker, Podman; • Kubernetes; • CI/CD pipelines. IT infrastructure administration tasks: • monitoring and maintain of servers and infrastructures; • DNS configuration, mail servers; • mesh networks (Netmaker, Zerotier etc), Wireguard, VPN (IPSec); • servers and workstations administration (Windows, macOS, Linux); Systems and services troubleshooting, data recovery: • OS restoring and boot recovery; • recovering of data, file systems and RAID; • software and systems troubleshooting.
  • Ubuntu
  • DNS
  • Virtual Private Server
  • Linux System Administration
  • Proxmox VE
  • Cloudflare
  • Web Hosting
  • Website Security
  • Scripting
  • Web Server
  • Data Recovery
  • Disaster Recovery
  • Debian
Aleksandr K.

Novi Sad, Serbia

$50/hr
5.0
166 jobs
Linux server installation and configuration. Virtualization systems: VMware, Proxmox. Cloud providers: AWS, GCloud, DigitalOcean. IaC (Terraform, Pulumi) Web server, web proxy configuration (Apache, Nginx, Traefik, Caddy, HAproxy). Monitoring servers, apps and network devices with Zabbix and Prometheus. Logging with Promtail+Loki, tracing with Tempo Grafana Containers: building and deploying Docker containers and services via docker compose. Container orchestration: Kubernetes. Writing Helm charts. GitOps with ArgoCD. CI/CD: GitlabCI, Jenkins, Ansible. Python and Go scripting
  • Google Cloud Platform
  • Asterisk
  • Grafana
  • Linux System Administration
  • Windows Administration
  • Zabbix
  • DevOps
  • Kubernetes
  • Git
  • Prometheus
  • CI/CD
  • Mac OS X Administration
Mitchell S.

Auckland, New Zealand

$160/hr
5.0
139 jobs
"At TechSquid, our job isn't complete, until yours is!" TechSquid is a new IT startup company, based in Auckland, New Zealand. TechSquid serves small to medium sized businesses across a wide array of common Technical issues, including: * Automation across PHP, Python, Javascript, VBA etc. * CRM Implementation and Customisation * O365 Implementation and Administration * Excel / Access Training * Customised Programming and Development * Data Visualisation We are just generally awesome when we get to use: * API’s * JSON/XML * REST Services * Curl * SSH * FTP/SFTP We have extensive experience across the following systems: * Woocommerce * Wordpress (Including BuddyBoss, BuddyPress, Memberpress, Paid Memberships Pro, Etc.) * All Microsoft Office Packages (E.g Excel, Access, Word etc) * Shopify * Zoho * Amazon Web Services * Bigcommerce * ERPNext Our main programming languages include: * JavaScript/JQuery * Python * PHP * VBA * HTML/CSS Drop us a line
  • Ubuntu
  • API
  • Python
  • PHP
  • JavaScript
  • Shopify
  • Odoo
  • Office 365
  • ERPNext
  • JSON
  • Salesforce
  • API Integration
  • Visual Basic for Applications
Qian J.

Shenzhen, China

$78/hr
5.0
121 jobs
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
  • Ubuntu
  • C
  • Embedded Linux
  • Embedded C
  • Linux
  • Kernel
  • Kernel-based Virtual Machine
  • Cloud Computing
  • Troubleshooting
  • Performance Optimization
  • System Programming
  • Linux System Administration
  • Network Engineering
  • Golang
  • Private Cloud
Phan Q.

Ho Chi Minh City, Vietnam

$40/hr
5.0
118 jobs
Experience in C/C++/C# Application: - 9+ years developing Desktop Applications/Embedded Software on Linux distributions. - Proficient in C/C++/Qt, problem solving skill, logical thinking. - Experience in Blockchain development. - Experience in Software Update. - Experience in developing IP camera and streaming solutions on Linux platform. - Experience in developing IoT for watch-over system on uT-Kernel platform. - Experience in developing Back End sever. - Experience with code refactoring techniques. - Experience with some security techniques. Experience in embedded domain: - 3+ years experiences on embedded systems(Bare-metal/RTOS) with ARM controllers from NXP like S32k, Nxp Kinetis M0/M4 microcontroller. - Experiences with different peripherals like DMA, SPI, I2C, GPIO, Clock, PWM, Input Capture,.. - Experiences with high-optimized code development for security ciphers on S32k, NXP Kinestis M0/M4. - Experiences with development of Autosar MCAL modules. - Experiences with development of bus like CAN, LIN, Flexray, Ethernet. Quickly adapt with new technology.
  • Ubuntu
  • C
  • Qt Framework
  • Embedded System
  • Linux
  • Golang
  • Embedded C
  • Java
  • C++
  • Blockchain
Greg G.

Aurora, United States

$80/hr
5.0
113 jobs
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.
  • Ubuntu
  • PHP
  • NGINX
  • Redis
  • Apache CouchDB
  • Apache Nutch
  • Memcached
  • Linux System Administration
  • Red Hat Administration
  • PfSense
  • HAProxy

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At A Glance: Ubuntu

Ubuntu is an open-source operating system designed to connect the digital arena to a single secure, simple, and effective system. The word “Ubuntu” translates into “humanity to others,” which is illustrated in the system’s abilities to work on many different devices and computers. That makes it easy for personal, business, or educational initiatives to gather together information, programs, and projects on one system. Installing and utilizing the many features of Ubuntu can help your business thrive in collaboration and communication like never before. However, completing this task requires time, education in coding, and experience in modifying digital software to suit your unique needs. Perhaps you do not have the time to devote to harnessing Ubuntu, or lack the resources or skills to handle it yourself. The Ubuntu specialists on Upwork are here to take the burden off your shoulders, offering their experience and talents in merging Ubuntu with your business, organization, or personal needs.

As talented freelancers, these experts have vast experience in a variety of fields, along with a diverse range of educational levels, meaning that out of the dozens of professionals to choose from, you’re sure to find the exact one who boasts of the credentials you need. Their flexible schedules make them ideal on the online workplace for collaborating remotely and getting things done despite time zone differences. Their competitive rates and ability to work independently with little guidance ensures you can entrust this task to their hands and receive high-quality results with nearly no effort.

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