We are currently seeking an informal hourly "on demand" arrangement with an experienced Linux systems administrator. We have custom built applications for payment, billing, call placing and establishing conference calls through SIP using the PJSUA library.
You need to be available to respond to automated service alerts when there is a problem. You need to be able to quickly identify the problem and rectify the situation, this includes program failures and bugs as well as securing the system from intruders and deny of service attacks.
You should also be able to pinpoint any performance bottlenecks and suggest appropriate hardware upgrades or scale up the system across servers. You would also need to perform system upgrades and manage system backups.
You need to be intuitive and autonomous to handle the tasks. You need to have good experience how to retrieve relevant new information about any problem.
This is a casual telecommuting position.
Demonstrated experience in maintaining sophisticated systems, other than just basic store/retrieve information systems
Strong understanding of the IP world on protocol level
Some insights into deeper level of the major services: http, dns, ...
Understanding system performance variables
Having experience in using a combination of standard Linux tools to solve ad-hoc problems
Lots of experience with troubleshooting daemons and applications.
Knowledge of the template concept (separating logic from presentation)
Some Python programming knowledge
Some PHP programming knowledge
Relational database management knowledge and data abstraction into objects
"Nice To Have Skills but not required"
Experience with version control system
Knowledge about the Hessian protocol
Knowledge and understanding of the SIP protocol
Experience with the PJSIP project
Please send resume to firstname.lastname@example.org