VoIP Architect

HighRadius; Hyderabad; On-site; INR 1,200,000 - 1,800,000; Full time

Job summary

A leading communications solutions provider is seeking a VoIP Calling Architect in Hyderabad, India. This role involves designing and developing VoIP services primarily with Asterisk, alongside high-performance Python backend development. Candidates should have over 5 years of experience with VoIP systems, cloud solutions, and integration with Twilio and Telnyx APIs. Collaboration is essential to deliver reliable calling solutions and promote scalable service development.

Qualifications

• 5+ years of experience building or maintaining production VoIP systems.
• 5+ years developing scalable services in Python using frameworks like FastAPI or Flask.
• Hands-on experience with Twilio and/or Telnyx APIs for voice and messaging.

Responsibilities

• Design dial-plans, IVRs, call routing, SIP trunking, and monitoring.
• Optimize performance and security of the Asterisk stack.
• Design and implement voice flows using Twilio and Telnyx APIs.

Skills

VoIP Protocols

Networking

VoIP Platforms

Troubleshooting

Security

Cloud Solutions

Python development

Twilio

Telnyx

Version Control

Tools

Twilio

Telnyx

Asterisk

Docker

GitHub/GitLab

Jenkins

AWS

Azure

Java

Spring Boot

ReactJS

Node.js

Job description

Overview

We are seeking a VoIP Calling Architect to join our growing communications product line. The successful candidate will be responsible for the design, development, and maintenance of VoIP services, primarily utilizing Asterisk. This role also involves designing and developing high-performance Python backend code and integrating cloud telephony features with Twilio and Telnyx. Collaboration with product and engineering managers will be essential to deliver end-to-end features and launch reliable, scalable calling solutions.

Technical Skills

Core Technical Expertise:

• VoIP Protocols: In-depth knowledge of SIP, WebRTC, RTP, H.323, and other relevant VoIP and media protocols.
• Networking: Strong understanding of TCP/IP, UDP, QoS mechanisms, LAN/WAN networking, routing, and switching.
• VoIP Platforms: Practical experience with Cisco Unified Communications Manager (CUCM), Avaya Aura, and open-source solutions like Asterisk.
• Troubleshooting: Knowledge and experience in troubleshooting audio issues in client environments such as VDI, VPN, and MPLS networks.
• Security: Awareness of VoIP security best practices, including encryption and firewalls.
• Cloud Solutions: Experience with cloud-based VoIP platforms and integration with services like AWS or Azure.

Required Experience:

• VoIP System Development/Maintenance: 5+ years of experience building or maintaining production VoIP systems using Asterisk, FreePBX, or FreeSWITCH.
• Scalable Service Development: 5+ years developing scalable services in Python (using frameworks like FastAPI, Flask, or Django).
• Voice/Messaging APIs: Hands-on experience with Twilio and/or Telnyx APIs for voice and messaging.
• Version Control & CI/CD: Proficient with Git and modern CI/CD pipelines (Docker, GitHub/GitLab, Jenkins, etc.).
• Experience working with Java, Spring Boot, and ReactJS to bridge backend and frontend communication layers.

Key Responsibilities

VoIP & Asterisk

• Design dial‑plans, IVRs, call routing, SIP trunking, and monitoring
• Optimize performance, security, and high availability of the Asterisk stack
• Build micro‑services, REST/gRPC APIs, background workers, and data pipelines

Telephony Integrations

• Design and Implement voice and messaging flows using Twilio and Telnyx APIs (Programmable Voice, Messaging, Webhooks, etc.)

Quality & Delivery

• Understand the current code base, and build new features.
• Designing the features on aggressive timelines with minimal iterations.
• Node.js for ancillary services
• Cloud deployment on AWS or GCP (EC2, Lambda, S3, IAM, CloudWatch)
• Familiarity with Jira, Confluence, and Agile delivery practices
• Certifications : Relevant industry certifications are highly valued, such as:
• Microsoft certifications for platforms like Teams Voice.