Summary
✨ AI‑Generated
Join a team responsible for large-scale telephony infrastructure as a hands-on Telephony Engineer. You will troubleshoot SIP signaling and media, work with VoIP platforms and dialplans, build infrastructure utilities, optimize performance, and administer Linux systems. Experience with cloud-native infrastructure and Go is a plus.
Highlights
Work on large-scale VoIP infrastructure with deep exposure to SIP, real-time media, networking, Linux, and telephony platforms, with opportunities to improve infrastructure performance and reliability.
Description
We're expanding the team and are looking for a Telephony Engineer.
Requirements
5 to 10 years of experience in VoIP and telephony engineeringDeep understanding of SIP protocol including messaging, methods, response codes and SDP, as well as troubleshooting of signaling and media issues including NAT and RTPKnowledge of FreeSWITCH/Asterisk/ or any other b2ua including architecture, dialplan development using Lua/XML/conf, configuration of SIP profiles, gateways and modules, performance optimizationExperience building utilities, tools, management services for VoIP infrastructureExperience with any kind of programming language.Solid understanding of networking including TCP IP, RTP RTCP and traffic analysis using tools such as tcpdump, Wireshark and sngrepStrong Linux administration (Debian or Ubuntu)
Nice to have
Experience with Go language.Experience with Kamailio/Opensips or rtpengineFamiliarity with CI CD, Docker, Ansible and KubernetesExperience with large scale telephony systemsExperience with ESL and Sofia knowledgeExperience with Node.js for integration services, event socket (ESL) interaction with FreeSWITCH and REST API developmentBackground in voice biometrics projects
Responsibilities
Design and modernization of the telephony infrastructureIntegration with telecom providers in the US, LATAM and EuropeOptimization of resources and telecom costsBuilding call handling systems from scratch for both outbound and inbound trafficDevelopment of integration solutions with the AI platformDriving reliability, scaling and fault toleranceWorking with high call volumes using Kamailio/OpenSIPS and rtpengineParticipate in 2d and 3d level support duties as well as on-call rotation
What We Offer
The team has built award-winning AI products for tech corporations — devices, voice assistants, products that are actually in the world Cutting-edge tech stack: Speech Technologies, NLP, Generative AI (LLMs, diffusion models), voice-first agentic architecture with privacy-first and on-premises deploymentHigh engineering bar and real ownership — the team cares about what actually works in production, not what looks good in a demo, and you'll see the impact of your work directly Fast career progression — a senior-heavy team and a high volume of real problems means you grow faster than you would anywhere else Startup pace with enterprise stability — real clients, real revenue, no bureaucracy Fully remote across Europe21 vacation days + public holidays + 5 sick days Private English lessons via Preply
