VoIP Architect

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.
• Database Skills: Solid SQL proficiency.
• 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 dialplans, IVRs, call routing, SIP trunking, and monitoring
• Optimize performance, security, and high availability of the Asterisk stack

Backend Development (Python & Java)

• Build microservices, 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.

NicetoHave

• Node.js for ancillary services
• Cloud deployment on AWS or GCP (EC2, Lambda, S3, IAM, CloudWatch)
• Frontend basics (React or plain JavaScript) for simple dashboards
• Familiarity with Jira, Confluence, and Agile delivery practices
• Certifications : Relevant industry certifications are highly valued, such as:
• Cisco Certified Network Professional (CCNP) Collaboration
• Cisco Certified Internetwork Expert (CCIE) Collaboration
• Microsoft certifications for platforms like Teams Voice.