Telecom Engineer I is a specialized engineering professional responsible for building, testing, and maintaining the voice solutions that power the customer voice integrations and Five9 cloud contact center platform.

Key Responsibilities A Five9 Telecom Engineer I focuses on the customer facing voice SIP trunk builds, architecture and operation of real-time communication systems, which includes:

• Developing high-quality, reliable, and high-performing voice applications across various platforms (desktop, web).
• Working with key technologies such as SIP, MPLS and VPN.
• Designing and optimizing low-latency voice pipelines and handling real-time streaming voice (RTP/SIP).
• Troubleshooting and resolving complex issues within the global voice platform.
• Collaborating with cross-functional teams (Product Managers, Global Solution Architects and Connectivity PMs) to deliver a seamless customer experience.
• Ensuring the platform is scalable, reliable, observable, and maintainable, following DevOps practices.
• Mentoring and training junior team members.

Required Skills and Qualifications Typical requirements for a voice engineering role at Five9 include:

• Experience: 5+ years of industry experience in software development and troubleshooting VoIP systems.
• Technical Expertise: Expert-level knowledge of SIP call flows, routing algorithms, and carrier interoperability. Strong hands-on experience with real-time voice systems in C++, Java, or JavaScript. Ribbon SBC (5k, 7k, SWe), GSX (9000)
• Networking Knowledge: Deep understanding of telecommunication protocols (SIP, RTP, WebRTC).
• Problem-Solving: Strong debugging skills and experience with audio media analysis and troubleshooting tools like SIPp.
• Methodology: Experience working within Agile/Scrum teams.

Company Benefits

• Company stocks
• Annual merit increase based on performance
• 15% night shift differential pay
• Paid Leave with Cash Conversion
• HMO with free dependents
• Retirement Plan
• Life Insurance
• While on work from home setup: Internet and meal allowance are provided
• Employee Assistance Program for mental and social well-being
• Government-mandated Benefits (SSS, PhilHealth, PagIBIG, 13th month pay, Solo parent leave, Special leave for women)

Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer.