Hire the Best FreeBSD Developers

Multi-discipline system engineer with more that 25 years of experience on Linux/Unix, networking, high performance computing and high availability / high reliability systems. Interested in: - Building large scale high-loaded web platforms running in heterogeneous environment - High performance networking with SDN/NFV - Embedded development and wireless technologies, mostly small-sized and power-efficient (IoT, etc).

Looking for challenging new projects which can effectively use my talents and creativity, to generate cost effective software solutions. I'm a world class C programmer (primarily on Unix/Linux) and I'm used to making "impossible" tasks "possible". I have a great deal of expertise in: * real time embedded systems * cross compilation/software construction * source control * network programming * system administration * kernel level programming/device drivers * image processing * performance and metrics

⭐ 100% Job Success | 🌟 Rising Talent | 🚀 Linux & DevOps Engineer I help founders and developers deploy, fix, and scale their infrastructure. From broken Docker containers and Nginx issues to full VPS deployments with SSL and CI/CD — I focus on solving real infrastructure problems fast and cleanly. What I work with: • Docker & Docker Compose • Linux / Ubuntu servers • Nginx & reverse proxies • CI/CD pipelines • Cloud & VPS deployments • FastAPI & PostgreSQL • Kubernetes basics • Infrastructure troubleshooting I already have hands-on experience maintaining Linux infrastructure, deploying web services, configuring SSL, and troubleshooting production issues. If your app needs deployment, debugging, or a stable server setup — I can help.

⭐️ Top Rated Plus - Top 3% Expert on Upwork 🕒 9000+ Working Hours ✅ 20+ Years of Expertise ✅ 100% Job Success ✅ 300+ Successful Projects Finished ✅ 5 Star Rating Hello, I'm Oleksandr. As a seasoned Linux System Administrator and DevOps Engineer with over 20 years of experience I specialize in delivering robust IT solutions that enhance operational efficiency and security. My expertise spans across various domains, including: ▪ DevOps & Automation: Successfully implemented automated provisioning using Ansible, streamlining deployment processes and reducing manual intervention. ▪ Linux & FreeBSD Maintenance: Managed and optimized server environments on CentOS, Debian, Ubuntu, RHEL, and FreeBSD, ensuring high availability and performance. ▪ Cloud Hosting: Deployed and maintained scalable cloud solutions on AWS, Azure, and DigitalOcean, enhancing infrastructure reliability and scalability. ▪ Virtualization: Utilized Docker, VirtualBox, and OpenVZ to create flexible and efficient virtual environments, supporting diverse application needs. ▪ Web & Database Servers: Configured and maintained Apache, Nginx, MySQL, PostgreSQL, and MongoDB servers, ensuring secure and efficient data handling. ▪ Networking & Security: Implemented secure networking solutions, including VPNs and firewalls, to protect sensitive data and maintain network integrity. I am committed to continuous improvement and staying abreast of the latest industry trends. My approach is rooted in ITIL best practices, ensuring incident management and business continuity planning are at the forefront of my work. Let's collaborate to drive your IT projects to success with innovative solutions and expert guidance.

An experienced software developer/architect/product development manager with over 15 years of solid experience in developing advanced and secure networking software for routers, switches, firewalls, servers, IoT devices/gateways and network appliances. Possesses deep working knowledge in IPv6, routing protocols, operating system, firewall, client-server application, management protocols and applications. Very proficient in C, C++, Perl, Unix scripting, modular and OOP programming, client-server and has advanced working skills in PHP, Ruby/Rails, Java, SQL, non-SQL and Web technologies. Mainly used FreeBSD and Linux in all projects. Heavily involved in all phases of development, from conceptualization, requirement specification making, designing, implementation, testing and maintenance. I am seeking opportunities to design and develop network appliances, IoT devices and embedded systems from the ground up, migrate networking applications to incorporate secure technologies and run on IPv4 and IPv6 and build intuitive and secure websites or web-based management interfaces. I am also seeking consulting services in product development, management, QA and coaching as well as design, deployment, pen-testing and monitoring of networking and security services and infrastructures. Summary of competencies and skills - System/network/security administration using open source and commercial solutions such as pfSense, OPNsense, BIND/DHCP/DNS, Freeswitch/Asterisk/SIP/VoIP, Sophos, Sonicwall, OpenWrt, ELK Stack, Grafana/Prometheus, Zabbix, Nagios, SNMP, OpenVPN, IPsec, Wireguard, HAProxy, MongoDB, MySQL/PostgreSQL, Redis, Nginx, Apache, Squid, Snort, OpenStack, Radius, OpenLDAP, Ceph, RabbitMQ, Kali Linux, Connectwise Manage, Connectwise RMM, Connectwise Perch, Bitdefender, WebRoot, Auvik, MQTT - IoT, LoraWAN, Chirpstack, Sensors, Rasp PI integration/interfacing, BACnet, BMS - Unix and Linux system, security, and network administration and dual-stack network/sockets programming - System/Application programming with C/C++, PHP, Ruby, Perl and Shell scripting. - Cloud computing and networking on AWS, IONOS and Digital Ocean environments - Virtualization with Proxmox, ESXi, vSphere, and KVM - Containerization using Dockers - Project management in various methodologies such as Extreme programming, Agile, Iterative, Waterfall, Prototyping, and Scrum - Software and hardware product development covering all phases of product life cycle - Secure networking software development for routers, switches, and network appliances in IPv4 and IPv6 network stacks - Software testing automation and Continuous Integration (CI) using Gitlab/Github, Jenkins, Robot Framework, Selenium - Risk assessment, Penetration testing, Disaster Recovery, Compliance and Interoperability testing, Performance and Capacity testing and High Availability deployment, management - Web Services, Application and network design, deployment, monitoring, and management - Managed Services Provider support and deployment, Connectwise suite(Manage, RMM, Perch), Bitdefender, Webroot, Auvik - Asset management, Document and Source Code control - Human resource training, career and life coaching

I focus on building reliable systems and enjoy digging into complex issues — performance tuning, disaster recovery, root cause analysis, and solving problems that aren't always straightforward. With 20+ years in system administration and infrastructure engineering, I work with both legacy systems and modern environments — from bare metal servers to virtualized and containerized setups. 🚀 Key areas I work with: • Infrastructure setup and migrations (bare metal ↔ VM ↔ cloud) • Troubleshooting and performance tuning (high CPU/load, slow systems, bottlenecks) • Email deliverability (SPF, DKIM, DMARC, spam issues, warmup, mail server reputation restoration) • Virtualization and containerization (VMware, Proxmox, KVM, Docker) • Networking and VPN solutions • Disaster recovery, backup strategies, malware cleaning, and finding the point of intrusion. • Long-term systems support and maintenance 🛠 Legacy Systems & Industrial Equipment Support • Migration and virtualization of legacy systems (DOS, Windows 3.x/9x/NT/2000) • Running outdated software on modern hardware via virtualization • Recovery systems from old working HDD to VM, if native hardware fails. Including industrial PCs. 🔧 Core Expertise • OS: FreeBSD, Linux (CentOS, AlmaLinux, Rocky, RHEL, Ubuntu, Debian, Gentoo), Windows, Windows Server • Virtualization: VMware vSphere, ESXi, Proxmox, KVM, oVirt, VMware Workstation, VirtualBox • Containers & Automation: Docker, Docker Compose, Jenkins, Ansible • Web: Nginx, Apache, LiteSpeed, Tomcat, Lighttpd, Caddy • Databases: MySQL, MariaDB, PostgreSQL, MongoDB • Mail systems: Postfix, Dovecot, Courier Cyrus, Rspamd, Postgrey, PostfixAdmin, SquirrelMail, Roundcube, SPF, DKIM, DMARC, MTA-STS, AWS SES, Mailgun, Sendy • Control panels: WHM/cPanel, VestaCP, Virtualmin, Cyberpanel, and so on 🔐 Networking & VPN • WireGuard, AmneziaWG, OpenVPN, StrongSwan, tinc, mpd5, IPSec, L2TP, IKEv2 • BGP (quagga), Squid (including LDAP and Kerberos auth), DNS (BIND), DHCP, TFTP • Fail2ban, iptables, ipfw, pf, csf 💾 Storage & Backup • TrueNAS Core/Scale, FreeNAS, SAN (iSCSI), ZFS, AWS S3, Backblaze, Wasabi • Veeam Backup & Replication, XSI Backup, rsync, rsnapshot, rclone ⚙️ Other • Samba3 + LDAP, Samba4 (NT4 and AD domains analog, LDAP, domains up to 500 users, GPO, roaming profiles) • Monitoring: Zabbix, Prometheus, Grafana • Services: Memcache, Redis, OpenLDAP, NFS, SVN, Git, GitLab (self-hosted), FTP, SFTP • Platforms: Moodle, Nextcloud, OnlyOffice, BigBlueButton, DAViCal, WordPress, Magento • Remote management: AnyDesk, TeamViewer, Radmin, Ammyy Admin, RustDesk, MeshCentral • Hardware: Dell, HP, Supermicro servers, Dell PowerVault storages • Networking equipment: HP, Dell, 3Com switches • Embedded/firmware: DD-WRT, OpenWRT (including software cross-compiling for ARM) • Scripting: Shell scripting, Python, PHP Have an interesting or unusual problem? That's exactly what I enjoy — feel free to reach out. I value long-term collaboration and quality over quick fixes.