🏆 LINUX KERNEL & NETWORK ENGINEER |DEVOPS, SERVER & CLOUD SUPPORT 🏆
I am a Linux Kernel, Network, and DevOps Engineer with good experience in Linux systems, server administration, networking, cloud, VPN, firewall, Synology NAS, and embedded Linux.
I help clients set up, manage, secure, troubleshoot, and optimize networks, servers, cloud systems, remote access, and low-level Linux systems.
▶︎ CORE SKILLS
✅ Linux Kernel & System Programming
Linux kernel development and debugging, kernel modules, device drivers
KVM virtualization, filesystem, network, USB, Linux video
OOPS debugging, performance analysis, system troubleshooting
C/C++, Bash, Makefile, Python
Linux system programming and low-level debugging
✅ Embedded Linux
OpenWRT, Yocto, Android Linux
Raspberry Pi, Orange Pi, embedded Linux boards
USB, XHCI, WiFi, LTE, network, and camera drivers
Router, gateway, and embedded system development
Hardware/software integration
✅ DevOps, Cloud & Virtualization
AWS, Azure, Google Cloud, VPS, dedicated servers
Docker, Kubernetes, QEMU, Libvirt, VirtualBox
GitHub Actions, GitLab CI, CI/CD setup
Nginx, Apache, SSL setup
Cloud server deployment and maintenance
✅ Network Setup & Administration
VLAN, routing, switching, subnetting
NAT, port forwarding, DNS, DHCP
VXLAN, iptables, router configuration
Network troubleshooting and performance fixing
Office network and secure remote access setup
✅ VPN & Remote Access
WireGuard, OpenVPN, IPSec VPN, L2TP
Site-to-Site VPN and Remote Access VPN
Secure remote access for users, office branches, and private servers
VPN troubleshooting and speed optimization
✅ Linux & Windows Server Administration
Ubuntu, Debian, CentOS, Rocky Linux, Arch Linux
Windows Server, RDP, SSH
Active Directory, Group Policy, users, permissions
File sharing, backup, updates, monitoring, logs
Server migration and issue fixing
✅ Firewall, Security & NAS
Firewall rules, traffic control, access policy
pfSense, MikroTik, Fortigate, Linux firewall
Synology DSM, shared folders, users, permissions
Backup, file sync, remote access, NAS security
▶︎ WHAT I CAN HELP WITH
✅ Linux kernel debugging and system troubleshooting
✅ Linux device driver and kernel module work
✅ Embedded Linux setup and development
✅ OpenWRT, Yocto, and Android Linux support
✅ VPN setup, firewall rules, and secure remote access
✅ Linux/Windows server setup and maintenance
✅ Docker, Kubernetes, CI/CD, Nginx, Apache, and SSL setup
✅ Cloud server setup on AWS, Azure, Google Cloud, VPS, or dedicated server
✅ Synology NAS setup, backup, and file server support
✅ Network performance, server performance, and system analysis
✅ DNS, DHCP, VLAN, NAT, routing, and port forwarding
I like to understand the problem first, then check the system carefully and fix it step by step.
I can help you keep your network, server, cloud, embedded Linux, NAS, firewall, and system software stable, secure, and high-performing.
Linux System Administration
Computer Network
Network Engineering
DevOps
Database Management
Computing & Networking
Low-Level Programming
Kernel
Cisco
UniFi
Desktop Application
Kernel-based Virtual Machine
Kernel Oops
C
C++
Sergiu P.
Chisinau, Moldova
$33/hr
5.0
18 jobs
I'm an Embedded Software Developer with over 7 years of experience, specializing in C/C++ development for the STM32, nRF52, and ESP32 MCU series. My work involves designing firmware for embedded systems and integrating technologies like Wi-Fi, Bluetooth, ADC, UART, and many other essential peripherals.
Throughout my career, I've taken on diverse projects, including the design of a CAN bridge using ESP32, full software development for an nRF52-based clicker device, and an ESP32-based toy featuring Machine Learning-powered wake-up word detection. I've also worked on embedded Linux projects, creating kernel modules for camera sensors, developing custom Linux images with Yocto, and integrating drivers for PCBs and peripherals.
Additionally, I bring experience in hardware testing, having developed test rigs using Robot Framework and Raspberry Pi, and I've worked extensively with DMA, event-based architectures, and energy metering devices.
If you're looking to create an innovative IoT solution or need a custom embedded system developed from the ground up, let's talk!
STM32
Python
FreeRTOS
C++
ESP32
C
nRF52
Zephyr
Firmware Programming
Veaceslav O.
Chisinau, Moldova
$25/hr
5.0
19 jobs
I have 20+ years of experience writing and maintaining desktop applications for Windows and Mac in Qt (C++), MFC (C++) and WPF (C#). I mainly specialize in control software for industrial equipment that require near real-time response. Have extensive knowledge of control interfaces and protocols (Ethernet, TCP/IP, serial RS-232, USB).
I also work on embedded projects, including: embedded Linux (C/C++, Raspberry Pi, TI Sitara) and pure C/C++ programming for SMT32 family.
I’m a founder and main driving force behind my own [tiny] software company.
Looking for some extra work in spare time.
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