Senior Telephony Engineer

CompanyNarwhal Media Group (NMG)

LocationCity Of Bristol, England, United Kingdom

Posted At1/6/2026

UK Visa Sponsorship Analytics

Occupation Type

Telecoms and related network installers and repairers

Occupation Code Skill LevelMedium Skilled

Sponsorship Salary Threshold

£41,700 (£21.38 per hour)

Standard minimum applies

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Description

Location: Bristol In House/Hybrid (must be within commutable distance of Bristol)

Employment Type: Full-time

Experience Level: Senior

Salary: £80k - £100k

About the Role

We are seeking an experienced Senior Telephony Engineer to design, build, and scale a robust, cloud-based voice communications platform. This role will focus on developing the core telephony infrastructure that powers programmable voice, call routing, real-time audio processing, and system reliability at scale.

You will play a key role in shaping the architecture of a modern communications platform and will work closely with backend, DevOps, and AI teams to deliver high-quality, production-grade voice services.

What You’ll Do

Architect and implement a scalable telephony infrastructure supporting inbound and outbound voice calls.
Design call routing, session management, and failover strategies for high availability.
Build and maintain real-time voice services using SIP, RTP, and WebRTC technologies.
Develop APIs and internal tooling for call control, provisioning, and monitoring.

Ensure low-latency, high-quality audio and reliable call delivery across regions.

Collaborate with AI teams to integrate voice services with speech recognition, TTS, and conversational agents.

Lead troubleshooting and optimization of complex telephony and networking issues.

Define best practices for security, compliance, and observability within voice systems.

What We’re Looking For

5+ years experience working with telephony or real-time communications systems.
Strong knowledge of SIP, RTP, VoIP, and call signaling protocols.
Experience building or operating large-scale voice or communications platforms.
Proficiency in at least one backend language (e.g., Python, Go, Java, or C++).
Strong understanding of networking concepts (NAT traversal, codecs, latency, jitter).
Experience with cloud infrastructure and distributed systems.
Ability to lead technical decisions and collaborate across multiple engineering disciplines.

Nice to Have

Experience with WebRTC media servers or SIP application servers.
Familiarity with telecom regulations, number provisioning, and compliance requirements.
Experience with monitoring real-time systems and call-quality metrics.
Exposure to AI voice pipelines (ASR, TTS, real-time streaming).

Why Join Us

Opportunity to build a foundational communications platform from the ground up.
Work on complex, real-time systems at scale.
Influence architecture and long-term technical direction.
Flexible working arrangements and competitive compensation.
Collaborative team environment with a strong engineering focus.