Software Engineer II – Voice Client

Five9

76d • $72,500 - $168,300

About The Position

Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide. Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves. The Voice Client team at Five9 is seeking a passionate and experienced Software Engineer II to help build and enhance the voice solutions that power our industry-leading contact center platform. This person will play a key role in developing high-quality, reliable, and high-performing voice applications across desktop (Mac and Windows) and web platforms using technologies such as SIP, WebRTC, ICE, and Web Sockets. This role requires strong technical expertise, problem-solving ability, and close collaboration with cross-functional teams to deliver exceptional audio quality and customer experiences. You’ll also have the opportunity to engage directly with customers, leveraging feedback to continuously improve and evolve our voice solutions for greater business impact.

Requirements

• 5+ years of industry experience in software development and troubleshooting VOIP systems.
• Great understanding on WebRTC in browser and/or SIP signalling.
• Proficient and expert in JavaScript. Additionally have a minimum of two years of practical experience in the second language between C++ and Java.
• Experience in troubleshooting tools, audio media analysis and good debugging skills.
• Experience working on complex problems and systems.
• Experience working within an Agile/Scrum team.
• Positive, self-motivated and enthusiastic attitude with a strong-sense of ownership.
• Strong communication skills, both verbal and written.
• Bachelor’s degree (or equivalent /above) in relevant discipline.

Nice To Haves

• Good understanding of VOIP protocols like SIP, RTP, RTCP and other network protocols.
• Experience in telecom or IoT field.
• Experience with Contact Centre, IVR, Virtual Agents and telecommunications service providers is advantageous.

Responsibilities

• Be part of an agile team to develop a scalable, highly available global voice platform.
• Understand performance and scalability principles and apply when developing software.
• Collaborate with Product Managers, Architects, Engineering leaders and test engineers.
• Mentor and train junior team members.

Benefits

• Health, dental, and vision coverage, beginning on the first day of employment.
• Five9 covers 100% of the employee portion of the health, dental and vision coverage and shares a high portion of the dependent cost.
• Short & Long-Term Disability, Basic Life Insurance, and a 401k saving plan with employer matching.
• Access to an innovative mental health support platform that offers personalized care and resources.
• Generous employee stock purchase plan.
• Paid Time Off, Company paid holidays, paid volunteer hours and 12 weeks paid parental leave.

What This Job Offers

• Career Level: Mid Level
• Education Level: Bachelor's degree