Senior Voip Engineer

Our client is a fast-growing, technology-driven company operating in the AI communication space, helping businesses streamline customer interactions through intelligent, real-time messaging solutions. Currently expanding, they are looking for a driven Senior VoIP Engineer Voice AI & New Product Development to own systems end-to-end, make architecture decisions that matter, and ship to production. Job Profile for Senior VoIP Engineer Voice AI & New Product DevelopmentDesign, develop, and maintain VoIP applications and services using Asterisk 22, OpenSIPS, and supporting technologiesBuild backend services and integrations using Java (Spring Boot preferred)Build and integrate voice AI agents that deliver high audio quality, natural latency, and reliable performance in productionDesign and ship new voice products — including ringless voicemail, branded calling, and advanced routingImplement SIP routing, call flows, dialplans, STIR/SHAKEN, media handling, andcustom modules when neededDevelop and maintain REST/ARI-based services and automation for telephonyworkflowsOptimise system performance, troubleshoot SIP/RTP issues, and analyse packet-level trafficDeploy, monitor, and manage VoIP infrastructure on Google Cloud Platform —scalability via MIGs, networking, load balancing, infrastructure-as-codeEnsure SIP security, fraud prevention, resiliency, and high availabilityCollaborate with cross-functional teams across DevOps, networking, and QA Candidate Profile for Senior VoIP Engineer Voice AI & New Product DevelopmentMust be fluent in English, both written and spokenHands-on experience with ringless voicemail (RVM)Open-source contributions in voice/telephony or audio AIStrong Java programming skills, ideally with Spring or similar frameworksHands-on experience with Asterisk v22 — dialplan, ARI/AMI, PJSIP, audio codecsSolid networking knowledge — SIP, RTP, TCP/UDP, NAT traversal, QoS, DNS, TLS firewalls, packet analysis (tcpdump, Wireshark)Strong experience with Google Cloud Platform — Compute Engine, VPC, load balancing, Cloud Logging/Monitoring, networking, Linux administration, shell scripting, and performance tuningUnderstanding of distributed systems, microservices, and high-availability architectureHands-on experience building, integrating, or operating voice AI systems (TTS, STT, real-time conversational AI) in productionSharp ear for audio quality — you can tell the difference between “demoable” and “production-ready” and you push for the latterFamiliarity with the current voice AI ecosystem (ElevenLabs, Deepgram, OpenAI Realtime, Cartesia, Vapi, etc.) and the trade-offs between providersKnowledge of containerization (Docker, Kubernetes) is a plusFamiliarity with CI/CD pipelines (Bitbucket Pipelines, Cloud Build, Jenkins) is beneficial5+ years of VoIP engineering experience, with hands-on voice AI exposure in productionPrior experience at a CPaaS, telco, or voice infrastructure companyExperience with OpenSIPS — SIP routing, modules, registrar, dispatcher, scriptingExperience with STIR/SHAKEN implementation (Asterisk or OpenSIPS)Experience with NoSQL or time-series databases (Bigtable, Couchbase, Redis) is an advantageExperience with message queues (Kafka, Pub/Sub, RabbitMQ) is preferredExperience with branded calling or other emerging voice products is a plusComfortable making architecture decisions and owning systems end-to-endStrong problem-solving — you debug complex SIP/RTP issuesAbility to work independently in a fast-paced environmentCollaborative mindset — small team where you own your domain What Our Client OffersCompetitive compensation aligned with the experienceOpportunity to work in a fast-growing AI company with a global footprint and a high-impact product used by businesses worldwideRemote setup with a globally distributed team, operating across multiple continentsFlexible working hours focused on outcomesExposure to a fast-scaling AI product used by thousands of businesses globallyOpportunity to work closely with founders and senior leadershipReal ownership and impact in a high-growth environmentPlease note: Candidates may be required to present references and diplomas, and have a background check