Team lead

Linux System Administrator

Full-Time Steinsel / Luxembourg

About Mixvoip

We are Mixvoip, a vibrant Luxembourg-based company that provides Cloud Telephony, Smart Networking, and High-Speed Internet services. We believe in offering our customers a fresh take on communication systems, and that’s where you come in!

About the Role

We are on the hunt for an exceptional individual to step into the role of lead Linux System Administrator. If you’re ready to take charge, work closely with our Chief Technology Officer (CTO), and lead a talented team of three, then this opportunity is tailor-made for you. Currently, our CTO is rocking the position, but we need your expertise to bring it to life and take it to the next level. Get ready for an exciting journey as we guide you through a full knowledge transfer of our current environment. You’ll be the driving force behind organizing day-to-day tasks, achieving milestones, and reporting directly to our CTO.

  • Leadership: In this role, you’ll have the opportunity to lead and mentor a team of three very skilled system administrators. Your focus will be on fostering collaboration, encouraging professional growth, and ensuring that the team operates efficiently and effectively. By organizing tasks and promoting open communication, you’ll create a positive work environment where teamwork flourishes.
  • Continuous improvement and best practices: In this role, you’ll be encouraged to stay informed about industry trends, emerging technologies, and best practices in Linux system administration. This knowledge will help you identify opportunities to enhance our infrastructure, streamline processes, and improve system performance and security. By implementing standardized procedures, documentation, and training programs, you’ll promote efficiency, smooth operations, and knowledge sharing.
  • Project management and milestone achievement: Collaboration with the CTO will be key as you define project goals, establish timelines, and determine deliverables. Leading the Linux system administration team, you’ll play a vital role in executing projects efficiently and effectively. Regular progress reporting to the CTO will keep everyone informed, allowing for insights and recommendations to be shared, ultimately optimizing project outcomes.

What do we need from you?

  • Strong Linux system and troubleshooting skills: You should have a solid foundation in Linux system administration and possess strong troubleshooting abilities. Your expertise in managing IT infrastructure, along with your proactive and self-learning nature, will be invaluable in this role.
  • Willingness to take on leadership responsibilities: You should have a curious mindset, eager to improve your leadership skills by exploring management practices on the internet, reading insightful blogs and books, and following engaging podcasts.
  • Hands-On involvement: This role isn’t just about leading from the sidelines; we need someone who isn’t afraid to roll up their sleeves and get their hands dirty. Alongside your leadership responsibilities, you’ll actively contribute to the day-to-day operations, diving into the work to ensure success at every level. It’s an opportunity to lead by example and be an integral part of our team’s accomplishments.
  • Hard Skills: Mysql, Mariadb, Galera, Sqlite, Postgresql, LDAP, Nginx, Apache, Elasticsearch, Prometheus, KLE stack, Docker, KVM, Openstack, Saltstack, Systemd, Rsyslog, Logrotate, HAProxy, Postfix, Dovecot, Powerdns, Bind, Subversion, GIT, VRRP, Bonding, iptables, ipset, fail2ban, wireguard, PFSense, OpenVPN, SNMP, Wireshark, Freeradius, Redis, Memcache, Grafana, Matrix, OpenVAS, Vmware…
  • Scripting and programming proficiency: A strong command of scripting and programming languages like PHP and Python will be a valuable asset in this role. You’ll have the chance to leverage these skills to automate tasks, optimize processes, and enhance system performance.

We know we’re asking for a lot, but here’s the exciting part: you’ll be joining a team of highly skilled Linux system administrators who are ready to support and collaborate with you every step of the way. While we’re looking for someone who possesses the qualities and skills mentioned above, we also understand that growth comes with time and experience. If you’re passionate about this opportunity and willing to grow and learn with us, don’t be afraid to apply.

A new way to apply: Join Mixvoip’s success story

Join Mixvoip and you won’t just be connecting businesses to high-speed internet, fiber, satellite, phone, or mobile networks – you’ll be connecting people, forging relationships, and making a real difference in our story.

So, if you’re prepared to embark on an engaging journey and play a pivotal role in Mixvoip’s saga, here’s an unconventional route to apply

We invite you to record a brief video with your smartphone. Share why you’re drawn to this role or pose any questions or doubts you might have. It’s about keeping the conversation open and engaging! Please remember to attach your CV in PDF format too.

Instead of a conventional motivational letter, we’d like you to employ chatGPT. This not only mirrors our technology-focused approach, but it also allows you to showcase your adaptability to new tools. It’s less about the letter, more about your interaction with chatGPT that we’re keen on.


Eager to join the ride? Send your video, chatGPT written letter, and CV to We can’t wait to hear from you!

PS: Want to know who you’ll be journeying with? Meet me, Marcin Rzeczkowski

I’m a 35-year-old who’s embraced the wisdom and stability that comes with age. It’s been a journey of self-discovery and growth, and I wouldn’t change a thing about it.

Professionally, my 12-year journey with Mixvoip has been nothing short of an adventure. Every challenge faced and milestone achieved has further ingrained the value of resilience and patience into my character. It’s a testament to my dedication and has shaped me into the knowledgeable individual I am today.

My green thumb isn’t just a hobby; it’s an extension of my ethos. Tending to plants and creating lush gardens require the same patience and dedication I’ve cultivated in my professional life. Every seed sprouted, every fern nurtured, echoes a journey from mere potential to vibrant life – a testament to sustained effort and care.

The bond I share with my two adopted street dogs, though, ties everything together. Their unconditional loyalty reflects the rewards of patience and commitment. Our walks in nature, whether a simple park stroll or a challenging hike, are more than just exercise. They serve as a reminder of the tranquility that patience brings and the happiness that dedication nurtures. In business, in gardening, in companionship – these principles remain true.