Equipe belledonne-communications

Join the Linphone team!

A human and technological adventure in the heart of the Alps.

Découvrir Linphone

Join the Linphone adventure

Contribute to the development of an innovative and ever-evolving Open Source project.

Our company specializes in developing real-time communication solutions, offering a complete suite that includes an SDK (Liblinphone), a server (Flexisip), and an application (Linphone). These VoIP solutions enable communications over the internet and are available on major platforms, including iOS, Android, Linux, Mac, and Windows.

We provide scalable solutions that are regularly updated to meet users’ needs. Numerous hardware and software applications in sectors such as telecommunications, home automation, and secure communications rely on Linphone, our VoIP engine.

With 90% of our business internationally, we work with a diverse range of clients, from telecom operators to innovative startups and businesses looking to integrate secure communication solutions.

💡 If you’re passionate about technical challenges and innovation, this is where it happens!

Technical skills of our teams

Standard telecommunications protocols

SIP, RTP, ICE, TURN, codecs, and web.

Expertise in software development

Core software in C/C++ with APIs for C#, Java, and Swift.

Media stream management

One of the only open-source media stream engines (voice, video, text) in the world.

Mobile and desktop applications

Mobile applications in native languages (Kotlin, Swift), and frameworks Xamarin and Qt.

Secure communications

SIP/TLS, SRTP-DTLS, ZRTP, end-to-end encryption, and post-quantum encryption.

VoIP infrastructure

Integration with third-party SIP servers (e.g., IPPBX, SBC).

Our job openings

If no position matches your profile or is currently available, feel free to send us an unsolicited application. We are always looking for motivated candidates!

Unsolicited application

Send us your CV along with a few lines about your motivations.