At least 2 years of experience in Asterisk system development, with a focus on module development and reporting tool customization Solid experience in C & C++ based multithreaded application development; minimum 5 years of experience Experience in development and troubleshooting in a Linux environment based on pthreads and locking primitives Experience in development on a major asterisk module and Asterisk 11 Comfortable with gdb or equivalent and debugging problems associated with real time, multithreaded applications Experience with common linux C development tools such as well as profiling tools such as valgrind and gprof Experience working with AGI Wide knowledge of Real Time Communication protocols and technologies and stacks (SIP, SDP, WebRTC/RT, SRTP) Experience with MySQL Asterisk system development Strong experience with Wireshark and telephony protocol dissectors Experience with Python, Github, Atlassian tools (JIRA and Confluence), Jenkins/CircleCi would be helpful Experience with monitoring systems (Prometheus, Zabbix, …) Solid scripting skills (e.g., shell scripts, Perl / Ruby / Python) Proven working experience in installing, configuring, and troubleshooting UNIX/Linux-based environments Strong troubleshooting skill in different network layers, esp. layer 2 & layer 3 up to layer 7 Solid experience in the administration and performance tuning of application stacks (e.g., Tomcat, Apache, Nginx, Haproxy or Env…) Experience with automation software (e.g., Puppet, cfengine, Chef, Ansible or Salt) (is a plus) Strong work ethic and communication skills both spoken & written Flexibility to work a variety of shifts with availability to work overtime BS/MS degree in Computer Science, Engineering or a related subject