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Mykhaylo R., DevOps/SRE/Lead System Administrator

Last Updated: 19 Mar 2024
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- Over 20 years in IT with a master's degree in Cybernetics - Proficient in Ansible: Extensive experience in deploying and managing Ansible-driven infrastructure, particularly highlighted in roles as SRE/Architect (Aug 2018 – Present) and Senior DevOps Engineer/Lead Sysadmin (Aug 2020 – May 2021), where Ansible was pivotal in scaling a learning platform from 1,000 to over 100,000 students and in key migration projects. - Expertise in Windows Environments: Demonstrated strong skills in managing Windows environments, especially as an SRE/Architect (Aug 2018 – Present) and CTO (2013 – Mar 2022), involving Windows AD+MSSQL backoffice management and ITIL Service Management framework implementation on Windows platforms. - Versatile IT Roles with Ansible and Windows: Across various roles including IT Service Manager, Senior DevOps Engineer, and CTO, consistently applied Ansible and Windows technologies in large-scale infrastructure projects and day-to-day operations, showing versatility and depth in these areas. - Managing the growth of the learning platform from 1,000+ to 100k+ active students - ITIL v3 Foundations Certificate - More than 5 years of experience in leading ITIL Service Management capability and implementing end-to-end ITIL Service Management framework - Strong experience in using ServiceNow and Jira Service Desk for ITSM - Experienced IT/Telecom Specialist - UNIX and UNIX-Like OS (FreeBSD, Linux, SunOS, MacOS X) background - Over 20 years of Windows/windows server family. From NT4.0 /win3.1 up to Server2019. As well as upgrading Up to 15 years with server HW, and 13 years with storage solutions - Infrastructure problem-solver with a strong view on reliability, performance, and disaster recovery - Fluent English

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Bash   10 yr.

Shell Scripts

Shell Scripts   10 yr.


MySQL   10 yr.



Ansible Playbook

Ansible Playbook

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Andrii Sh., DevOps Engineer

Cherkasy, Ukraine
Last Updated: 4 Jul 2023

- 24 years of professional expertise in the IT industry; - 2+ years of work experience with Kubernetes; - 6+ years of experience with Docker; - Solid skills in working with AWS Cloud Platform; - Experience with blockchain projects on Ethereum and Polkadot; - Deep knowledge of building and supporting monitoring and alerting systems using Grafana and Prometheus; - Good understanding of work with Terraform. - Skilled in designing, building, and improvement of the IT infrastructure; - Experienced in the implementation of solutions on Microsoft\ Apple \ and Unix platforms - Deep understanding of building virtual and cloud environments; - Experience in building corporate backup systems;

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Kubernetes (K8s)

Kubernetes (K8s)

Amazon Web Services (AWS)

Amazon Web Services (AWS)





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Michael A., Senior DevOps/SRE/Telecom specialist

Uzhgorod, Ukraine
Last Updated: 4 Jul 2023

- IT and Telecom specialist - Specialities: UNIX and UNIX-Like OSes (FreeBSD, Linux, SunOS, MacOS X) - Over 20years of Windows/windows server family. From NT4.0 /win3.1 up to Server2019. As well as upgrading Up to 15 years with server hw, 13 years with storage solutions. - 6 years with Microsoft 365 - Esx server/vsphere 5.0-7.0, hyper-v, freebsd bhyve - Able to translate configs between cisco/extreme/juniper/openbgpd etc. - ITILv3 associate, strong in ITIL/ITSM - Linux/macos (as well as server)/ FreeBSD/HP-UX - Available ASAP - Upper-Intermediate English

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SRE   15 yr.

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Yaroslav M., DevOps Engineer

Dnipro, Ukraine
Last Updated: 26 Oct 2023

- Highly motivated Systems Engineer and DevOps with 13+ years of experience in Linux and FreeBSD systems administration, scripting, automation, and configuration management; - Experienced in troubleshooting and root-cause analysis of complex infrastructure issues; - Proficient in cloud platforms such as AWS, Azure, and GCP, as well as CI/CD tools like GitLab CI and Jenkins; - Skilled in containerization with Docker and Kubernetes, and monitoring tools like Grafana and Prometheus; - Strong background in database management with MariaDB, MySQL, PostgreSQL, and more; - Proficient in programming languages such as Groovy, Bash, and PowerShell; - Experienced in virtualization technologies like VMware ESXi and Proxmox, as well as hardware infrastructure planning and maintenance.

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Amazon Web Services (AWS)

Amazon Web Services (AWS)

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Sergii Kh., Azure DevOps

Kyiv, Ukraine
Last Updated: 26 Oct 2023

- Experienced software engineer with over 3 years of experience in DevOps engineering and more than 15 years of experience in IT infrastructure; - Proficient in communicating with customers and business stakeholders, troubleshooting and designing IT infrastructure; - Skilled in hardware support for servers of different brands; - Self-educated and continuously growing skills in networking, Windows, VMware products, Cisco, HPE, and Veeam; - Expertise in Azure and AWS clouds, CI/CD, containers (SaaS, PaaS, IaaS, K8S, AKS, Docker, Kubernetes, Swarm), monitoring tools (Zabbix, Prometheus/Grafana, ELK Stack), IAAC (Terraform, Ansible), operating systems (CentOS, RedHat, Ubuntu, OraLinux, FreeBSD), application/web servers (NGINX, Apache, Tomcat, WEB hosting), databases (Azure SQL, MSSQL, PostgreSQL, MariaDB, MongoDB, MySQL), scripting languages (CSS, HTML, PHP, NODE.js, Python, Pascal, PowerShell, BASH), and more; - Certified in Microsoft Azure Fundamentals (AZ-900) and Cisco NETacad; - Extensive experience in implementing CI/CD/CD for CRM systems, launching projects, and resolving architecture issues; - Proven track record in supporting and designing IT infrastructure, coordinating administrators, and providing user support in various organizations.

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Microsoft Azure

Microsoft Azure

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Table of Contents

Soft skills of a FreeBSD Developer

Soft skills of a FreeBSD Developer:


  • Effective Communication: Ability to clearly and concisely communicate technical concepts and ideas to team members and stakeholders.
  • Problem Solving: Strong analytical and critical thinking skills to identify and resolve issues in the FreeBSD codebase.
  • Collaboration: Willingness to work as part of a team and contribute to the collective effort of developing and maintaining FreeBSD.
  • Time Management: Ability to prioritize tasks and meet deadlines in a fast-paced development environment.
  • Adaptability: Flexibility to quickly adapt to changing requirements and technologies in the FreeBSD ecosystem.


  • Leadership: Ability to take ownership of projects and guide junior developers in their work.
  • Mentoring: Willingness to share knowledge and mentor junior developers to help them grow their skills.
  • Code Review: Skill in providing constructive feedback and conducting thorough code reviews to maintain code quality.
  • Teamwork: Collaboration with cross-functional teams to achieve project goals and deliver high-quality software.
  • Problem Solving: Advanced problem-solving skills to tackle complex issues and find innovative solutions.
  • Documentation: Ability to create clear and comprehensive technical documentation for FreeBSD projects.
  • Continuous Learning: Dedication to staying updated with the latest developments and best practices in FreeBSD development.


  • Architecture Design: Proficiency in designing and implementing scalable and efficient software architectures for FreeBSD.
  • Technical Leadership: Ability to guide and mentor developers in making technical decisions and solving complex problems.
  • Project Management: Skills in planning, organizing, and executing large-scale FreeBSD projects.
  • Collaboration: Effective collaboration with stakeholders, including other teams, management, and external contributors.
  • Code Optimization: Expertise in optimizing code for performance and efficiency in FreeBSD applications.
  • Quality Assurance: Strong focus on ensuring the quality and reliability of FreeBSD software through thorough testing and debugging.
  • Release Management: Experience in managing the release process for FreeBSD distributions and coordinating with release engineering teams.
  • Community Engagement: Active participation in the FreeBSD community, including contributing to mailing lists, forums, and conferences.

Expert/Team Lead

  • Strategic Planning: Ability to define long-term goals and roadmap for FreeBSD development initiatives.
  • Technical Vision: Visionary thinking to anticipate future trends and technologies relevant to FreeBSD.
  • Team Management: Skills in leading and managing a team of developers, ensuring efficient collaboration and productivity.
  • Codebase Ownership: In-depth knowledge of the FreeBSD codebase and responsibility for its overall quality and integrity.
  • Community Leadership: Active involvement in shaping the direction of the FreeBSD community and driving community initiatives.
  • Cross-Functional Collaboration: Collaboration with other open-source projects and organizations to foster innovation and interoperability.
  • Public Speaking: Proficiency in delivering technical presentations and representing FreeBSD at conferences and industry events.
  • Research and Development: Dedication to exploring new technologies and conducting research to enhance FreeBSD’s capabilities.
  • Security Awareness: Thorough understanding of security principles and practices to ensure the robustness of FreeBSD.
  • Technical Advocacy: Promotion of FreeBSD as a reliable and high-performance operating system through technical writing and advocacy efforts.
  • Conflict Resolution: Skill in resolving conflicts and mediating disputes within the FreeBSD community or development teams.

TOP 10 FreeBSD Related Technologies

  • Programming Languages: C

    C is the most fundamental and widely used programming language for FreeBSD software development. It provides low-level control and efficient execution, making it ideal for system programming and kernel development.

  • Programming Languages: C++

    C++ is another popular language used for FreeBSD software development. It offers additional features such as object-oriented programming and template metaprogramming, making it suitable for building complex applications and libraries.

  • Programming Languages: Python

    Python is a high-level scripting language that is gaining popularity in FreeBSD software development. It offers simplicity, readability, and a vast ecosystem of libraries, making it a great choice for rapid prototyping and scripting tasks.

  • Version Control: Git

    Git is a widely used distributed version control system in the FreeBSD community. It allows developers to track changes, collaborate, and manage source code efficiently. Its flexibility and robustness make it an essential tool for software development.

  • Build System: CMake

    CMake is a popular cross-platform build system that simplifies the process of compiling and building software on FreeBSD. It provides a unified configuration language and supports various compilers and platforms, making it versatile and widely adopted.

  • Package Management: pkg

    pkg is the default package management tool in FreeBSD. It allows users to easily install, update, and manage software packages from the official FreeBSD repositories. Its simplicity and integration with the FreeBSD ecosystem make it a preferred choice for software deployment.

  • IDE: Visual Studio Code

    Visual Studio Code is a lightweight and feature-rich integrated development environment (IDE) that has gained popularity among FreeBSD developers. It offers powerful code editing capabilities, debugging tools, and extensive plugin support, enhancing productivity and developer experience.

Cases when FreeBSD does not work

  1. Hardware Incompatibility: FreeBSD, like any other operating system, may face compatibility issues with certain hardware components. While FreeBSD supports a wide range of hardware devices, there may be instances where specific hardware components, especially newer ones, are not fully supported or lack proper drivers. It is always recommended to check the FreeBSD Hardware Compatibility List (HCL) before installing FreeBSD on a particular system to ensure compatibility.
  2. Outdated Software: FreeBSD is known for its stability and reliability, which often comes at the cost of having slightly older software versions included in the base system. If you require the latest versions of certain software packages or need compatibility with software that is not supported on FreeBSD, it may not be the ideal choice for your specific use case.
  3. Desktop User Experience: While FreeBSD can be used as a desktop operating system, it is primarily designed for server and networking environments. If you are seeking a user-friendly and feature-rich desktop experience with extensive graphical interfaces and a vast array of pre-installed applications, FreeBSD might not be the most suitable option. Other operating systems, such as Windows, macOS, or Linux distributions like Ubuntu or Fedora, may offer a more refined desktop experience for general users.
  4. Limited Commercial Support: Compared to some other operating systems, FreeBSD may have limited commercial support options available. While the FreeBSD community is highly active and provides excellent community support, organizations that rely heavily on commercial support contracts may find that FreeBSD does not offer the same level of support or service agreements as other commercially-focused operating systems.
  5. Specific Software Dependencies: If your project or application has specific software dependencies that are only available on other platforms or are not compatible with FreeBSD, it may not be feasible to use FreeBSD. While FreeBSD offers a significant number of software packages through its ports system, there may be instances where specific software or libraries are not available or cannot be easily ported to FreeBSD.
  6. Limited Gaming Support: If gaming is a primary use case, FreeBSD might not be the best choice. While there are games available for FreeBSD, the majority of mainstream gaming titles are primarily developed and optimized for other operating systems such as Windows or popular gaming consoles.

TOP 15 Facts about FreeBSD

  • FreeBSD is a free and open-source Unix-like operating system that is widely used in various industries, including telecommunications, networking, and web hosting.
  • It is known for its advanced networking capabilities, robustness, and high performance, making it a popular choice for servers and embedded systems.
  • FreeBSD originated from the Berkeley Software Distribution (BSD) Unix operating system, which was developed at the University of California, Berkeley.
  • Unlike some other operating systems, FreeBSD follows a development model that emphasizes stability, reliability, and backward compatibility.
  • One of the key features of FreeBSD is its highly scalable and efficient networking stack, which allows it to handle a large number of concurrent connections with low latency.
  • It provides support for a wide range of hardware architectures, including x86, ARM, PowerPC, and MIPS, making it versatile and adaptable to different environments.
  • FreeBSD has a reputation for excellent security, with a dedicated security team that actively responds to vulnerabilities and releases timely security updates.
  • It includes a powerful and flexible firewall called IPFW, which allows network administrators to control and filter network traffic based on various criteria.
  • FreeBSD supports a variety of file systems, including UFS, ZFS, and HAMMER, providing users with flexibility in choosing the most suitable file system for their needs.
  • It offers native support for virtualization technologies such as bhyve and Xen, enabling users to run multiple virtual machines on a single FreeBSD host.
  • FreeBSD has a vast collection of software packages available through its package management system, called pkg. This makes it easy for users to install and manage additional software on their systems.
  • It has a dedicated community of developers and users who actively contribute to its development, provide support, and maintain a vast amount of documentation and online resources.
  • FreeBSD is often praised for its exceptional performance in handling network traffic and serving web content, making it a popular choice for high-traffic websites and content delivery networks.
  • It is widely used by internet service providers (ISPs) and hosting companies due to its stability, security, and ability to handle heavy workloads.
  • FreeBSD has been the foundation for several other popular operating systems, including Apple’s macOS, Netflix’s Open Connect Appliance, and Juniper Networks’ Junos operating system.

What are top FreeBSD instruments and tools?

  • FreeBSD: FreeBSD is an advanced operating system for modern server, desktop, and embedded computer platforms. It is derived from BSD, the version of UNIX developed at the University of California, Berkeley. FreeBSD has a long history, with the initial release in 1993. It is known for its reliability, scalability, and performance, making it a popular choice for servers and high-performance computing environments.
  • pkg: pkg is the package management tool used in FreeBSD. It allows users to easily install, upgrade, and manage software packages on their FreeBSD systems. With over 35,000 packages available in the FreeBSD Ports Collection, pkg provides a convenient way to install and maintain software on a FreeBSD system. It supports dependency tracking, package signing, and provides a consistent package management experience.
  • ZFS: ZFS is a combined file system and logical volume manager designed by Sun Microsystems (now owned by Oracle). It was ported to FreeBSD in 2005 and has since become a key feature of the operating system. ZFS offers advanced features such as data integrity protection, snapshotting, and easy administration. It is widely used for storage solutions and is particularly popular in the FreeBSD community.
  • Jails: Jails are a lightweight virtualization mechanism in FreeBSD that allow for the creation of isolated environments, known as jails. Each jail has its own file system, network stack, and process space, providing a secure and efficient way to run multiple applications or services on a single FreeBSD system. Jails have been available in FreeBSD since version 4.0 and are widely used in hosting environments and for application sandboxing.
  • DTrace: DTrace is a powerful dynamic tracing framework originally developed by Sun Microsystems and later ported to FreeBSD. It allows for real-time tracing and profiling of system events, providing detailed insights into system performance and behavior. DTrace is widely used for performance analysis, debugging, and system monitoring on FreeBSD systems.
  • Poudriere: Poudriere is a tool for building custom package repositories in FreeBSD. It provides a flexible and efficient way to build, test, and manage packages for FreeBSD systems. Poudriere supports package customization, dependency tracking, and can build packages for multiple FreeBSD versions and architectures. It is commonly used by FreeBSD package maintainers and for creating custom package sets for specific environments.
  • pf: pf is a stateful packet filter that was originally developed for OpenBSD and later ported to FreeBSD. It provides advanced firewall capabilities, including packet filtering, network address translation (NAT), and traffic shaping. pf is known for its performance, scalability, and ease of configuration, making it a popular choice for securing FreeBSD systems and networks.
  • bhyve: bhyve is a lightweight virtualization solution for FreeBSD that provides native hypervisor capabilities. It allows for the efficient and secure execution of guest operating systems, making it suitable for server virtualization and cloud computing environments. bhyve was introduced in FreeBSD 10 and has since gained popularity as a reliable and performant virtualization solution.
  • OpenSSL: OpenSSL is a widely-used open-source toolkit for SSL/TLS and cryptographic protocols. It provides libraries and utilities for secure communication, encryption, and certificate management. FreeBSD includes OpenSSL as its default cryptographic library, making it an integral part of the operating system’s security infrastructure.
  • OpenSSH: OpenSSH is a suite of secure networking utilities that provide encrypted communication over a network. It includes tools for secure remote login, file transfer, and tunneling. OpenSSH is widely used in FreeBSD for secure remote administration and secure file transfers.

Pros & cons of FreeBSD

6 Pros of FreeBSD

  • Advanced Security: FreeBSD is known for its robust security features. It has a reputation for being highly secure and resistant to vulnerabilities. The operating system has an impressive track record of minimal security breaches.
  • Reliability and Stability: FreeBSD is renowned for its stability and reliability. It is widely used in critical infrastructure systems, servers, and networking devices due to its ability to handle heavy workloads and maintain consistent performance over long periods.
  • Excellent Performance: FreeBSD is optimized for performance, making it an ideal choice for high-performance computing and demanding workloads. It utilizes advanced memory management techniques and efficient process scheduling algorithms, resulting in superior performance compared to other operating systems.
  • Flexible Licensing: FreeBSD is an open-source operating system distributed under the highly permissive BSD license. This licensing model allows users to freely modify, distribute, and customize the system to suit their needs without any restrictive clauses or licensing fees.
  • Large and Active Community: FreeBSD has a large and vibrant community of developers and users who actively contribute to its development and provide support. This active community ensures that FreeBSD remains up-to-date with the latest technologies and receives timely bug fixes and security updates.
  • Extensive Documentation: FreeBSD offers comprehensive and well-maintained documentation, including manuals, guides, and forums. This extensive documentation makes it easier for users to understand and work with the operating system, even for those with limited experience.

6 Cons of FreeBSD

  • Hardware Compatibility: FreeBSD’s hardware compatibility can be a challenge. While it supports a wide range of hardware, it may not have drivers available for the latest or less common hardware components. Users may need to invest additional effort in finding or developing drivers for specific hardware.
  • Smaller Software Ecosystem: Compared to some other operating systems, FreeBSD’s software ecosystem may be relatively smaller. While it provides a solid foundation and essential software packages, users may need to rely on third-party repositories or ports to access a wider range of software options.
  • Steep Learning Curve: FreeBSD can have a steep learning curve, especially for users who are new to Unix-like operating systems. Its configuration and administration methods may require additional effort and knowledge compared to more user-friendly operating systems.
  • Limited Commercial Support: While the FreeBSD community provides excellent support, users seeking commercial support options may find them more limited compared to some other operating systems. This can be a consideration for organizations that require dedicated commercial support for their FreeBSD deployments.
  • Less Desktop-Oriented: FreeBSD’s primary focus is on server and networking environments rather than desktop usage. While it can be used as a desktop operating system, users looking for a robust and feature-rich desktop experience may find other operating systems better suited to their needs.
  • Less Popular than Linux: Linux is more widely adopted and has a larger user base compared to FreeBSD. This can result in fewer resources and community-driven projects specifically tailored to FreeBSD, although the active FreeBSD community helps compensate for this.

How and where is FreeBSD used?

NetflixNetflix, the world’s leading streaming platform, relies heavily on FreeBSD for its content delivery network (CDN). FreeBSD’s networking stack, security features, and scalability make it an ideal choice for handling the massive amounts of data that Netflix streams to millions of users worldwide.
Sony PlayStationFreeBSD is the operating system used in the development of Sony PlayStation gaming consoles. Its stability, performance, and security play a crucial role in providing a seamless gaming experience to millions of PlayStation users around the globe.
WhatsAppWhatsApp, one of the most popular messaging apps, utilizes FreeBSD for its server infrastructure. FreeBSD’s robustness, high-performance networking, and efficient memory management contribute to the app’s reliable messaging service used by billions of users daily.
Juniper NetworksJuniper Networks, a leading provider of networking solutions, utilizes FreeBSD in their widely deployed Junos operating system. FreeBSD’s networking capabilities, security features, and stability are instrumental in delivering high-performance networking products for enterprise and service provider networks.
PlayStation 4FreeBSD powers the operating system of PlayStation 4, Sony’s highly successful gaming console. FreeBSD’s versatility, scalability, and support for multi-core processors enable the console to deliver immersive gaming experiences and multimedia functionality.
WhatsApp WebFreeBSD is used in the backend infrastructure of WhatsApp Web, allowing users to access their WhatsApp accounts through a web browser. FreeBSD’s reliability, performance, and security contribute to the seamless synchronization of messages across multiple devices.
Netflix Open ConnectNetflix Open Connect, the content delivery network responsible for delivering Netflix’s streaming content to ISPs, relies on FreeBSD. FreeBSD’s robust networking stack, efficient caching mechanisms, and scalability enable fast and efficient content delivery to millions of Netflix subscribers worldwide.
CiscoCisco, a global leader in networking and telecommunications equipment, incorporates FreeBSD into some of its products. FreeBSD’s stability, security, and extensive networking features make it an excellent choice for building reliable and high-performance networking solutions.
WhatsApp StatusFreeBSD powers the backend infrastructure of WhatsApp Status, the feature that allows users to share photos, videos, and text updates. FreeBSD’s performance, reliability, and efficient resource utilization ensure smooth and uninterrupted sharing of multimedia content among WhatsApp users.

Let’s consider Difference between Junior, Middle, Senior, Expert/Team Lead developer roles.

Seniority NameYears of experienceResponsibilities and activitiesAverage salary (USD/year)
Junior0-2 yearsAssisting in the development and maintenance of software applications, writing and testing code, debugging issues, participating in code reviews, learning and improving coding skills, collaborating with the team.$50,000 – $70,000
Middle2-5 yearsDeveloping software applications, designing and implementing features, optimizing code, troubleshooting and fixing bugs, collaborating with team members, mentoring junior developers, participating in planning and estimation.$70,000 – $90,000
Senior5-8 yearsLeading the development of complex software projects, providing technical guidance and mentoring to junior and mid-level developers, designing and architecting software solutions, participating in code reviews and performance optimizations, collaborating with cross-functional teams.$90,000 – $120,000
Expert/Team Lead8+ yearsLeading a team of developers, managing projects from concept to delivery, making technical decisions, providing strategic direction, mentoring and coaching team members, driving innovation and best practices, collaborating with stakeholders, ensuring high-quality deliverables.$120,000 – $150,000+

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