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VOIP Systems Developer

Location : Chicago, IL
Job Type : Direct
Hours : Full Time
Required Years of Experience : 3+ years
Required Education : Bachelor's Degree Preferred
Travel : No
Relocation : No

Job Description :



Trusted by thousands of hotel clients with over one million users of our solutions worldwide, our client is the leading provider of cloud-based telephony, high speed internet access, contact centers and communications services for the hospitality industry.  Our integrated and holistic approach to communications ensures hoteliers can streamline their technology infrastructure and operations, helping hotels deliver exceptional care and services to their guests as well as enabling new revenue opportunities.


We’re looking for an experienced and talented VoIP systems developer to join our team.  In this role, you will be contributing to the strategic objectives of client’s hosted PBX product by developing, testing, and supporting hosted voice applications and infrastructure to meet the demands of our clients in the hospitality industry. As part of an agile development team, you will maintain platform stability through regular maintenance and operations tasks while squashing bugs and developing new features to contribute to the evolution of our products and services. Cloud-hosted services include: auto-attendant, voicemail, e-fax, PBX, Call accounting, monitoring, and integrations with various property management applications. 

The ideal candidate will be a team player capable of thriving in a fast-paced environment, have a strong grasp of PBX system design and implementation, and have excellent written and verbal communications skills - able to explain complex concepts to both customers as well as development work partners.  A self-starter, the ideal candidate is driven to innovate around smart, efficient, and highly reliable solutions.  The ideal candidate is comfortable working hands-on and leading teams to design, develop, deploy and integrate new products and services for both customer as well as back-end environments, with a strong focus on efficiency and automation.

Required Qualifications :



* Design and develop scalable solutions to deliver reliable SIP services to tens of thousands distributed endpoints including on-prem SIP proxy servers, handsets, and soft-phones

* Perform pre-production testing within staging environments

* Deploy features and changes to the production platform

* Create custom provisioning tools to automate configuration of voice stack

* Participate in projects intended to improve infrastructure, including the integration of new systems and software

* Find and solve problems that arise in services

* Draft technical documentation (as-built) for all solutions

* Facilitate knowledge transfer to deployment and support teams

* Work with your team to contribute to continuous improvement efforts related to all process and technology

* Be an active member of an Agile Development Life Cycle



* 3 or more years of experience in the position of VoIP engineer or systems engineer

* Expert understanding of SIP Stack

* Experience in designing and deploying PBX systems

* Strong understanding of TCP, RTP, RTCP, T.38 Protocols and standards

* Experience with configuring Asterisk, including writing dialplan code

* Familiarity with Linux system administration including: Install/configuration, managing services (restarting, configuring, etc.), Basic troubleshooting (reading log files, etc.)

* Experience configuring and troubleshooting VoIP equipment including ADTRAN, Oracle SBC/ECB, Vtech/Polycom/Cedis handsets, etc.)

* Good communication skills

* Good team player

* Experienced with or open to working in agile development teams

* Driven by intellectual curiosity and focused on excellence in service delivery

* Programming languages/capabilities: PHP, SQL, Ruby.  Perl and Python experience a plus




-       dCAP Certification is desirable

-       Experience configuring Oracle Acme packet SBC, ECB

-       Familiarity with enterprise monitoring and logging platforms (Zabbix and ELK is a plus)

-       Experience with Oracle Palladion/EOM SIP logging

-       Experience with DevOps tools and methodologies, particularly with Puppet,

-       Familiarity with basic layer 2/3 networking, including subnetting, assigning IPs, etc.

-       Experience using Git for common tasks (branching, committing changes, merging)



-       We are in the vibrant West Loop neighborhood with easy accessibility to mass transit as well as food/drink options

-       Building access to rooftop deck for summer meetings, lunches, and company get togethers

-       Multiple medical/dental/vision health benefit options offered

-       401(K) savings plan

-       Competitive PTO


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