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Work at Four Js

One position is open right now — and we're always interested in people who know this world.

Open positions

Junior System and Network Administrator

Strasbourg (FR)Posted 27 Aug 2026

We are looking for a Junior System and Network Administrator to oversee our IT infrastructure, ensuring its performance, security, and alignment with business needs. She/he is responsible for setting up, maintaining and ensuring the availability of the entire production infrastructure. He or she coordinates certain team tasks and works on complex projects.

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Introduce yourself.

Four Js builds the platform that mission-critical business applications run on — some of them for more than thirty years. When we hire, we look for people who care about software that has to keep working. If that's you, send us your profile and we'll keep it on file.

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Who we are

Mission-critical software, built for the long run.

Four Js does one thing, and has for more than 30 years: keep mission-critical applications alive and moving forward. We operate from nine offices in nine countries, and support customers across five continents. We're part of the Volaris Group, which is part of Constellation Software.