VoIP Engineer

Altitude Software
Ready for the next level?

Job details

  • Full-time
  • map markerLisbon, PT
  • cardRequires Work Permit
    Requires that you're a citizen or have a valid work permit / visa sponsorship to work in the country in which this position is based.
  • routeIntermediate
  • routePortuguese
    Preferred spoken language

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We are a global software solutions company with headquarters in Portugal, Spain and Brazil. Our mission is to empower our customers to build great customer experiences. We make a difference on thousands of organizations, with hundreds of thousands of users serving millions of people around the world. We research, develop, sell and support “state of the art” unified customer interaction solutions for the global market, with a committed and diverse team, competing against some of the best technology companies in the world.

To join our Research and Development team based in Lisbon, you will have plenty of opportunities to develop yourself and to grow inside a multinational company.

You will have to develop robust code for the components of our products, following the technical design. Also, code review, unit test and check if integrated solutions works, to ensure its correct development.

Main requirements

  • Graduation in computer science engineering or related fields

  • At least 2 years of experience

  • Development using Webrtc, SIP, RTP and SDP protocols

  • Troubleshooting voice application using tools like Wire


  • Development with major frameworks and languages like Java, .NET, C/C++ or Javascript

  • Knowledge of VoIP / SIP application

  • GIT

  • Strong communication, teamwork, analytical and problem-solving skills, proactivity, commitment and flexibility

  • Also, we are looking for someone who doesn't like to live with "broken windows", and is proactively fixing bugs

Nice to have

  • Knowledge of English, both written and spoken
  • Will to learn

  • Some experience with cloud communications platforms like Twilio

  • Some experience using Redis, RabbitMQ or Apache Kafka

  • Working and configuring Kamailio, RTPEngine and Asterisk


  • Health Benefits
  • Daily fresh fruit
  • Free coffee
  • Possibility to work from home
  • Phone
  • Flexible Schedules
  • Relaxed and informal work environment

Apply now

Sign up to apply

Or sign up to refer and earn a reward of €300