Telecom Engineer I - Voice Delivery Engineer

Five9; Metro Manila; On-site; PHP 900,000 - 1,500,000; Full time

Benefits offered by this job

Stock options

Annual merit increase based on perfom?

Night shift differential pay

Paid leave with cash conversion

HMO with dependents

Retirement Plan

Life Insurance

Internet and meal allowance for work‑f

Employee Assistance Program

Government-mandated Benefits (SSS, Pag

Job summary

Five9 is a leading provider of cloud contact center software, empowering customers worldwide with cloud-based voice and contact center solutions. The Telecom Engineer I role focuses on building, testing, and maintaining voice technologies powering the Five9 platform and customer voice integrations.

You will work with SIP, RTP, and WebRTC, optimize voice pipelines, and collaborate with cross-functional teams to ensure scalable, reliable delivery.

Qualifications

• 5+ years of industry experience in software development and VoIP troubleshooting.
• Expert-level knowledge of SIP call flows and routing algorithms.
• Strong hands-on experience with real-time voice systems in C++, Java, or JavaScript.
• Experience working in Agile/Scrum teams.

Responsibilities

• Develop high-quality, reliable voice applications across platforms (desktop, web).
• Collaborate with Product Managers, Solution Architects and Connectivity PMs to deliver seamless customer experience.
• Troubleshoot and resolve complex issues within the global voice platform.
• Design and optimize low-latency voice pipelines and real-time streaming voice (RTP/SIP).
• Ensure the platform is scalable, observable, and maintainable following DevOps practices.
• Mentor and train junior team members.

Skills

VoIP engineering

SIP call flows

Real-time voice systems

C++, Java, JavaScript

Ribbon SBC

GSX

Networking protocols

Agile/Scrum

Tools

Ribbon SBC (5k/7k/SWe)

GSX (9000)

SIPp

WebRTC

Job description

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 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

• 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

• 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.

View our privacy policy, including our privacy notice to California residents here: https://www.five9.com/pt-pt/legal.

Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.