Join us in creating a safer, more open Internet

Nothing works without infrastructure – and at CZ.NIC, that’s our job. Our team takes care of everything from internal IT support to managing network services, and we're divided into three teams: nic-admins look after internal IT systems, servers, and provide support for colleagues. Sys-admins keep the domain registry, MojeID, and other key services of the Czech internet up and running. Net-admins manage the .CZ domain, DNS, and anycast.

Each team has around five members, and every day we tackle challenges that have a real impact on the Czech Internet.

We’re looking for teammates who are eager to learn, take part in big projects, and help move our infrastructure forward. Are you into infrastructure and networks? Let us know!

We develop and maintain internal tools for CZ.NIC, while also working on projects used by the public like MojeID or the newly launched Domain Auctions. We’re also in charge of the websites for our products and services. Our tech stack is built mainly around Python, and we work with Django, FastAPI, Docker, Git, and SQL.

We’re a team where everyone has their own project, but we also aim to stay as versatile as possible. We share know-how, work in GitLab, meet weekly, and stay connected through our internal chat.

We value analytical thinking, team spirit, and a drive to find smart solutions. We’re looking for colleagues who want to work on a variety of projects and bring their own ideas to the table.

We develop and maintain Turris routers from hardware design and security updates to a user-friendly web interface. We handle the entire process, from prototyping and manufacturing to software development. Part of the project is Turris Sentinel, a security research program featuring honeypots and a dynamic firewall that helps protect both our routers and their users. Our team is divided into support, hardware, and software groups, all connected through the kernel team. Together, we form a well-coordinated crew where everyone has their own specialty – but we’re always open to stepping outside our usual role. We work with OpenWrt, build our own web interface using Python, Flask, and React, and process honeypot data (written in C) using Python, storing it in PostgreSQL and Redis.

An active user community is both our biggest advantage and a constant source of feedback – they’re not shy about telling us what works and what could be better. 

Are you into networking, open-source, and embedded systems? Great – we’re looking for people like you. And if you enjoy making complex tech easier to use, even better.

We test, verify, give feedback and sometimes happily break things, all to make sure users get software that works the way it should. We’re responsible for the quality of CZ.NIC’s key systems from MojeID and the domain registry to internal tools. Besides testing itself, we also handle technical support, documentation, and feedback on design and specifications. Every project is different, so we use a mix of testing methods – manual and automated, frontend and backend, performance and load testing.

There are ten of us on the team (plus one dog). Each of us has a different specialty, but we work as one – testing, doing code reviews, complementing each other’s skills, and thoroughly checking the software from every angle. Our challenge is finding the right balance between speed and quality. And the best moment? When everything runs smoothly after a release and users get an app that does exactly what they need – just the way it should.

We’re looking for someone who’s independent but knows when to ask for help. We trust each other and have each other’s backs – even when things get intense. And once it’s all behind us, we laugh about it over a beer.

We do cybersecurity seriously. Ourselves, not really. We not just protect at CZ.NIC but nationally as the CSIRT.CZ operator. Incident prevention, response, and education are part of our job. Security analysis, penetration testing, and digital forensic analyses are all performed with open source software. And not just do we employ tools but write them ourselves. It's solutions like PROKI or Deny Lists that keep internet users from being exploited, and PROKI has been noted by the cybersecurity industry.

We are a massive incident response, pentesting, system development, and administration team. We have one of us who is an Interpol-trained expert specifically for dealing with child abuse content. We all specialize in different areas but we share information and collaborate in smaller groups based on requirements.

We want people with great technical skills, strong ethics and mission awareness. And if you don't wince at dark, sometimes rather crude humor, then you will be in good company.

You won't get lost here. We are the first contact point for customers and registrars in need of help with domains or MojeID. It is not merely about answering questions, it is about making a good first impression of CZ.NIC. With each passing day we talk, clarify and look for a solution.

We are a team of ten and we work 24/7, so we take shifts on a rotation basis. We work in an open space office where we make decisions on the fly, but if need be, we also use email or chat. What's the most rewarding part of this work? It matters. We're the first point of contact for everyone, and the way we make things happen impacts how they think about CZ.NIC. And, we look out for each other — we're a tight-knit crew.

If you like to talk, you're patient and can handle the odd demanding customer, we'll teach you the rest. You don't need to know what you're doing, but you must be willing to learn.

Labs teams maintain public open-source projects. We develop, test, resolve bugs and do support users. We understand network infrastructure but we don’t actually run it. Sometimes, we write an RFC.

Complex data structure swamp is our home. We love and hate the never explored bushes of optimized algorithms. Refactoring is like woodchopping. Demanding and quite hard to do it right, yet important.

Our main projects are BIRD, Knot DNS, Knot Resolver, Datovka a Adam.