Telephony Engineer - UK AI Startup

RocketPhone.ai; Greater London; Hybrid; GBP 40,000 - 80,000; Full time

Job description

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GTM, Biz Dev & Marketing Leader | Growing the #1 conversation processing platform for Salesforce

Telephony Engineer – AI-Powered Voice Solutions

Location: Hybrid - London

Type: Full-Time

About RocketPhone.ai:

RocketPhone.ai is the #1 conversation processing platform for Salesforce, transforming how businesses handle voice and video interactions. Fresh off the back of our $10 million funding round, we’re scaling fast, with an expanding base of active customers who rely on us to unlock real-time insights from every conversation.

We’re headquartered in London, where you’ll be joining a high-energy team backed by world-class leadership. Our CEO is a Salesforce veteran, bringing decades of experience in scaling enterprise SaaS, while our Director of Engineering—a former Google leader—ensures we build with technical excellence and innovation at our core.

This is an opportunity to own your role, make an impact, and grow with a company that’s moving fast. With eligibility for share options, you’ll have skin in the game as we push towards the next stage of our journey. If you thrive in a high-growth, fast-moving environment and want to be part of an ambitious team that’s disrupting the market, this is the ride for you.

Role Overview

We are looking for a Telephony Engineer to take full ownership of our telephony infrastructure. You will be responsible for integrating, managing, and optimizing our telephony stack, ensuring seamless connectivity between our AI system and enterprise voice sources.

Key Responsibilities

1. Telephony Integration: Design, implement, and manage integrations with PBX systems, SIP trunks, VoIP providers, and cloud-based telephony platforms.
2. SIP and VoIP Management: Maintain and optimize SIP signaling, media handling, and VoIP infrastructure for low-latency, high-reliability voice processing.
3. Real-Time Audio Processing: Work closely with AI and engineering teams to ensure high-quality audio streams for real-time analysis and actions.
4. System Architecture: Design and maintain scalable telephony solutions that support enterprise deployments.
5. Troubleshooting & Support: Diagnose and resolve telephony-related issues, ensuring high availability and performance.
6. Security & Compliance: Implement best practices for telephony security, encryption, and regulatory compliance.

Key Skills & Experience

1. Strong expertise in VoIP, SIP, RTP, PBX systems (Asterisk, FreeSWITCH, OpenSIPS, Cisco, Avaya, etc.)
2. Familiarity with telephony APIs (Twilio, Plivo, SignalWire, etc.)
3. Proficiency in networking protocols (TCP/IP, UDP, TLS, NAT traversal, STUN, TURN)
4. Experience with cloud telephony and containerized deployments (AWS, Kubernetes, Docker)
5. Strong problem-solving and debugging skills

Nice-to-Have

1. Experience with speech-to-text (STT) and AI-driven voice processing
2. Knowledge of mobile operator infrastructure
3. Knowledge of real-time media processing frameworks (GStreamer, FFmpeg, etc.)
4. Familiarity with telephony security, fraud detection, and call authentication (STIR/SHAKEN)

Why Join Us?

1. Be a key player in a growing, innovative telecom AI startup
2. Competitive salary and benefits
3. Flexible work environment

If you’re passionate about telephony, AI, and real-time communications, we'd love to hear from you!

Seniority level

Mid-Senior level

Employment type

Full-time

Industries

Telecommunications