# Principal VoIP Software Engineer (Java & SIP)

Posted on August 3, 2012 — 4:24 pm

yuilop is looking for a Principal VoIP Software Engineer, that will coordinate the creation of a ground breaking Voice Over IP (VoIP) mobile service.

We are a team of engineers involved in the development of a revolutionary mobile product and if you like to work surrounded of innovation and determination you should join us!

Job Responsibilities

• 3-6 years proven domain expertise in developing software of Voice related technologies .
• Communication skills in working and driving discussions with teams, both engineering and marketing.
• 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.

Your personal information will be incorporated in a file created and managed by Yuilop, S.L. with registered office at C/ París Nº 207 3º 1ª 08008 Barcelona, Spain, Fiscal Number B65377665. The file has been notified to the Spanish Data Protection Authority. We will use your data to assess your application of enrollment in Yuilop. You can exercise your access, modification, cancellation and opposition rights by sending your request to privacy@yuilop.com

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