Sr Software Engineer

About the Team

The Voice Client Team is responsible for delivering critical voice call capabilities for our customer call and contact centre solutions. Our focus is on providing high-quality audio and seamless communication experiences. The team develops native applications for macOS and Windows, along with web-based applications using the latest web technologies.

We work closely with our customers to understand their needs, quickly address concerns, and continuously enhance our products—ensuring exceptional customer experience and measurable business impact.

Role Purpose

The role is focused on identifying customer challenges, leveraging the Five9 Voice Platform, and delivering customer value through solution implementation and ongoing support. This position involves close collaboration with cross-functional teams and occasional direct interaction with customers.

Key Responsibilities

• Work as part of an agile team to design and develop a scalable, highly available global voice platform.

• Apply performance and scalability principles in software development.

• Collaborate with Product Managers, Architects, Engineering Leads, and QA Engineers to deliver robust solutions.

• Mentor and guide junior developers to foster a culture of technical excellence.

• Participate in code reviews and contribute to continuous improvement initiatives.

Required Skills and Qualifications

• 5+ years of experience in software development and VOIP system troubleshooting.

• Strong understanding of WebRTC (in browsers) and/or SIP signalling.

• Expertise in JavaScript, with at least 2 years of hands-on experience in either C++ or Java.

• Experience with debugging, audio media analysis, and use of troubleshooting tools.

• Proven experience in solving complex technical problems within distributed systems.

• Familiarity with Agile/Scrum methodologies.

• Strong ownership mindset, proactive attitude, and excellent communication skills.

• Bachelor's degree (or higher) in Computer Science, Engineering, or a related field.

Preferred / Desirable Skills

• Understanding of VOIP protocols such as SIP, RTP, RTCP, and other network protocols.

• Experience in Telecom or IoT domains.

• Background in Contact Centre, IVR, Virtual Agents, or Telecommunication Service Provider environments.

Additional Information

• This position requires on-call availability as part of the support rotation.

Key Stakeholders

• Product Management Team

• Customer Support Team

• Engineering & QA Teams