Come work with us!
Position closed

Core Developer

Engineering, TLV, Israel, January 16 2020


Viber is a calling and messaging app that connects people – no matter who they are, or where they’re from. With a free and secure connection, over 1 billion users worldwide communicate with their loved ones through high-quality audio and video calls, messaging, and much more

Our infrastructure team is growing and looking for a skilled engineer to join the team! What you’ll do:

  • Development of cross platform features (iOS/ Android/ macOS/ Win/ Linux) with emphasis on cross platform performance.
  • Full range of tech stacks – starting from low level C++ code to high level Java / Swift/ Objc, from raw tcp/ udp to REST.


  • Lead the entire development cycle – from requirement gathering to implementation and integration into the whole solution.
  • Ability to integrate cross platform code into diverse platform clients: Android, iOS, Windows.
  • Come up with new innovative solutions to improve the infrastructure in terms of performance, security and robustness.
  • Evaluate new communication and secure technologies.
  • Development of new features and maintenance of existing ones.
  • Main technologies involved: C++ with all industry standard external libraries.
  • Ability to understand and handle Java, Swift, Objective C code


  • 3+ Years of experience as a Core Developer or as a similar position
  • B.A/B.Sc. in Computer Science or equivalent military background
  • Expertise in C, C++, OOP concepts and Design Patterns
  • Experience in multi­threading, design-patterns
  • Familiar with Java, Swift, Objective C
  • You strive to solve problems in innovative ways
  • Flexibility and ability to work in a multi-tasking and dynamic environment
  • Rapid development capabilities
  • Ability to work both on a team and independently


At Rakuten Viber, we connect people–no matter who they are, or where they are from. As a communication platform that connects hundreds of millions of people around the world, we know that the way people communicate changes on an almost daily basis. That’s why we dedicate ourselves to providing added value to communication — from private and group chats to audio and video calls to the ability to follow and contact brands, businesses and celebrities. Viber is an all-in-one platform for everything communications-based, and all Viber communications are protected by end-to-end encryption. Viber is part of the Rakuten Group, a world leader in e-commerce and financial services.