Internship Program

TechCrunch disrupt finalist & Israel’s start-up of the year, CallApp is 1 of 50 most downloaded app in Google Play & the #1 Caller-ID & contacts App. CallApp is the world’s most comprehensive caller-id which identifies a billion unknown callers before you pick up the phone & updates your contacts with social picture & info.
Our mission to provide the ultimate communication experience. We love our product and are extremely passionate about it. Located in the heart of Tel Aviv, we appreciate people from different disciplines, and are open to new ideas and developments. Join our voyage of making a real change and impacting millions globally.
So… If you’re a fun person who would like to intern with top notch developers and are passionate about technology UX and/or algorithms – come get invaluable experience at CallApp. Email us anytime at



CallApp was founded in 2011 by a group of passionate industry experts, well funded by VCs and angels. At CallApp, we are on a mission to change the way people communicate. Available on android on Google Play.

requirement Senior Android developer / lead:
CallApp is looking for a talented, top-notch Android senior developer with very high programming and design capabilities. 
From designing the architecture, through talks with the product team on the look and behavior of the app, to optimizing for speed and finalizing the experience to the smallest details.
As part of the development team you will be responsible for creating new state-of-the-art UI and UX as well as implementing complex client-side algorithms and business logic reaching our multi-million user community.
Desired Skills and Experience:
At least 2 years Android experience – must
Experience in Android UI development
Thorough knowledge of Android architecture is a must
Experience as a team leader or technological leader is a big advantage
Experience in developing consumer applications – a plus
Very high level of programming and design capabilities.
Experience with social networks API’s – a plus
Strong team player with love of coding.
Able to work independently and as a team member.
requirement Senior Server developer / lead:

CallApp is looking for a talented and enthusiastic Server-Side/Backend developer, preferably with experience working in a production client-server (Mobile) environment.
As a senior developer in the server team, you will be responsible, among other things, to implement algorithms, develop a robust infrastructure that scales to millions of users per day, define and develop the API’s, perform tasks from end to end, deploy on the cloud (AWS) and more.
Desired Skills and Experience:
At least 4 years Java experience
At least 2 Years of backend development experience
Experience with the following technologies is an advantage: Spring, Hibernate, MySQL, Cassandra, Linux
Experience with highly scalable platforms.
Experience with cloud architecture (AWS, etc.).
Experience with mobile applications a plus, but not required.
Experience with JSON and RESTful protocols.

Experience with working on Big Data platforms is a plus
Strong team player with love of coding.
Able to work independently and as a team member.
UX/UI designer
requirement UX/UI designer leader

We are growing and looking for a UX/UI designer to join our team.
You’ll turn high-level concepts into pixel-perfect UI renderings, and collaborate with our team to put it out into the multimillion-user CallApp community.

  • Design and creating new wireframes
  • Managing all assets for product & Marketing
  • Oversee brand style guide
  • influence and take part in product decisions


  • Portfolio-proven experience of creating beautiful UI designs for mobile platforms
  • 3+ years of digital product design experience
  • Experience, knowledge, and understanding of UI and UX principles
  • The eye to create and analyze consistent visual language
  • The ability to take a spec through wire-framing to pixel-perfect visual design which users would fall in love with and easily understand how to use
  • Highly motivated, hard working with hands-on attitude
  • Great teamwork and communication skills
  • Proficient Adobe Illustrator skills
  • Pixel Perfect OCD
  • Experience of working with developers and bringing your vision down to a tech level
  • Ability to juggle multiple priorities and work in a fast-paced, dynamic environment
requirement Requirement

Experience in developing Android / iOS applications
Experience in developing client-server applications (client side)
Experience with social networks API’s – a plus
Experience in developing consumer applications – a plus
B.Sc. in Computer Science or equivalent – a plus
Hacker at heart, strong team player with love of coding