Design, modernize, and operate large-scale VoIP telephony infrastructure (FreeSWITCH/Asterisk/Kamailio). Integrate carriers, build call handling for inbound/outbound, optimize costs and resources, develop integrations with AI, ensure reliability/scalability, and participate in 2nd/3rd-level support and on-call rotation.
Description
We're expanding the team and are looking for a Telephony Engineer.
Requirements- 5 to 10 years of experience in VoIP and telephony engineering
- Deep understanding of SIP protocol including messaging, methods, response codes and SDP, as well as troubleshooting of signaling and media issues including NAT and RTP
- Knowledge of FreeSWITCH/Asterisk/ or any other b2ua including architecture, dialplan development using Lua/XML/conf, configuration of SIP profiles, gateways and modules, performance optimization
- Experience building utilities, tools, management services for VoIP infrastructure
- Experience 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 sngrep
- Strong Linux administration (Debian or Ubuntu)
Nice to have
- Experience with Go language.
- Experience with Kamailio/Opensips or rtpengine
- Familiarity with CI CD, Docker, Ansible and Kubernetes
- Experience with large scale telephony systems
- Experience with ESL and Sofia knowledge
- Experience with Node.js for integration services, event socket (ESL) interaction with FreeSWITCH and REST API development
- Background in voice biometrics projects
- Design and modernization of the telephony infrastructure
- Integration with telecom providers in the US, LATAM and Europe
- Optimization of resources and telecom costs
- Building call handling systems from scratch for both outbound and inbound traffic
- Development of integration solutions with the AI platform
- Driving reliability, scaling and fault tolerance
- Working with high call volumes using Kamailio/OpenSIPS and rtpengine
- Participate in 2d and 3d level support duties as well as on-call rotation
- 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 deployment
- High 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 Europe
- 21 vacation days + public holidays + 5 sick days
- Private English lessons via Preply
Similar Jobs
Fintech • Legal Tech • Software • Financial Services • Cybersecurity • Data Privacy
Provide corporate governance and legal entity administration support: coordinate board and shareholder meetings, maintain statutory registers and corporate records, prepare filings and legal documents, liaise with directors, auditors, and advisers, manage share capital administration, and support operational tasks such as bank account administration.
Top Skills:
Document Management SystemsExcelMicrosoft OutlookMicrosoft Word
Enterprise Web • Hardware • Internet of Things • Software
Embed with manufacturing customers to design, build, and deploy Tulip solutions. Lead OT/IT integrations (PLCs, MES/ERP, quality systems), troubleshoot production issues, and deliver scalable, production-ready applications. Advise on architecture, document solutions, and represent customer needs to Product and Engineering.
Top Skills:
Cloud-NativeEmbedded AiErpMachine Data IntegrationsMesNo-Code PlatformPlcsQuality SystemsTulip Frontline Operations Platform
Big Data • Food • Hardware • Machine Learning • Retail • Automation • Manufacturing
As a Finance FP&A Manager, you will lead financial planning processes, ensure compliance, analyze financial performance, and support decision-making within a Finance team, while driving continuous improvement initiatives.
Top Skills:
Data AnalysisFinancial ModelingFinancial PlanningReporting
What you need to know about the Dublin Tech Scene
From Bono and Oscar Wilde to today's tech leaders, Dublin has always attracted trailblazers, with more than 70,000 people working in the city's expanding digital sector. Continuing its legacy of drawing pioneers, the city is advancing rapidly. Ireland is now ranked as one of the top tech clusters in the region and the number one destination for digital companies, with the highest hiring intention of any region across all sectors.
