Senior VoIP Software Engineer (Java & SIP)

If you are passionate over new technologies and spend most of your time developing code you should join us!

We are a team of engineers involved in the development of a revolutionary mobile product.

Job Responsibilities

• 2-4 years proven domain expertise in developing software of Voice related technologies – VoIP.
• Communication skills in working and driving discussions with teams, both engineering and marketing.
• Very Good Java application software development  knowledge
• Demonstrated system and solution level focus while owning and understanding few product components/features

Job Requirements

• BS in Telecomunication or Computer Information Systems, or equivalent. MS or PhD is a plus
• Knowledge of VoIP Protocols SIP, RTP and SRTP
• Knowledge of TCP/IP – UDP/IP and experience with network programming
• Experience building and scaling distributed, highly available systems

Bonus Points
You are a contributor to open source projects and like “hacker culture”

Fast & Functions Challenge (Java or Erlang)

Write code that implements the described functions to be executed as fast as possible:

• Build a function that given a list of Integers in the range [-65000,65000], the function

returns true if any subset of the list summed is equal to zero. False otherwise.

Example:

■ [0, 1, 2, -3] returns true. As 1+2+(-3)==0.

■ [1, 2, 3, -8] returns false. As no subset summed is equal 0.

■ [1, 4, 5, 2, -3] returns true.

• Build a function that given a list of Integers pairs in the range [-65000,65000], that represents {X, Y} Coordinates in a Plane. The function returns the two closest pairs.

○ Example:

■ [{0,0}, {1,20}, {5, 2}] returns [{0,0}, {5, 2}]

■ [{-10,10}, {1,5}, {4, 3}] returns [{1,5}, {4, 3}]

Start date: ASAP
Location: Barcelona – First Mobile World Capital!
Offer: We offer creative freedom, competitive salary including employee stock option program, as well as fun work environment in Barcelona city center with a fruit stocked kitchen and more.