{"id":1282898,"url":"https://alion.io/job/synthflow-ai-leadsenior-voip-engineer","title":"Lead/Senior VoIP Engineer","company":{"id":6349,"name":"Synthflow AI","domain":"synthflow.ai","url":"https://alion.io/company/synthflow-ai","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Deel","truth_index":null},"role":"DevOps","role_family":"DevOps","seniority":"lead","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Berlin, Germany"],"countries":["DE"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":67000,"max_usd":182000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":982},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Git","optional":false},{"name":"Linux","optional":false},{"name":"Tcpdump","optional":false},{"name":"Wireshark","optional":false},{"name":"Bash","optional":true},{"name":"GCP","optional":true},{"name":"Kubernetes","optional":true},{"name":"Python","optional":true},{"name":"Voice Agents","optional":true}],"status":"live","first_seen_at":"2026-09-25T20:16:47Z","employer_posted_date":"2026-09-25","last_verified_at":"2026-10-20T10:35:41Z","board_verified":true,"closed_at":null,"days_open":24,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":24},"description":"Synthflow AI is an enterprise AI agent platform that unifies customer operations across voice, chat, and messaging. Our agents handle routine interactions at scale so teams can focus on high-value work.\nOver 20M hours of operations automated\n\n60% more calls answered vs. non-AI operators\n\n150M interactions handled, 99.99% uptime\n\nBacked by Accel, Atlantic Labs, and Singular. Trusted by 1,000+ customers. Recognized as one of the most promising companies in Germany.\nWe’re looking for a hands-on VoIP Engineer to help build, maintain, and improve our telephony infrastructure, with a focus on Kamailio and RTPEngine. You’ll work on SIP routing, media handling, and production troubleshooting to keep our voice services reliable and performant.\nThis role is a good fit for someone with practical Kamailio and RTPEngine experience, working knowledge of FreeSWITCH, and strong Linux and SIP/RTP debugging skills.\nYour Responsibilities\nDeploy, configure, and maintain Kamailio and RTPEngine\n\nTroubleshoot SIP signaling, RTP media, and call quality issues\n\nSupport FreeSWITCH services and Linux-based telephony infrastructure\n\nImprove call routing, load balancing, failover, and monitoring\n\nManage configurations in Git and document operational changes\n\nWhat We’re Looking For\nHands-on experience with Kamailio and RTPEngine\n\nStrong SIP/RTP debugging skills using tools like sngrep, tcpdump, or Wireshark\n\nWorking knowledge of FreeSWITCH\n\nSolid Linux administration and networking skills\n\nExperience with Git and collaborative change management\n\nNice to have: GCP, Kubernetes, Python or Go, and Bash scripting\n\nFounded in Berlin in 2023 by serial entrepreneurs Albert Astabatsyan, Hakob Astabatsyan, and Sassun Mirzakhan-Saky, Synthflow AI democratizes access to advanced voice AI with a no-code platform that lets enterprises easily create, deploy and scale natural-sounding, cost-effective voice agents tailored to their business needs.","description_format":"text","description_chars":1934,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Conversational AI","Speech & Audio AI","AI Agents"],"lifecycle":[{"event":"open","at":"2026-09-26T03:41:37Z"}],"visa":[],"liveness":{"score":57,"band":"ok","label":"Likely open","p_open":1,"p_active":0.754,"p_room":0.75,"age_days":24,"expected_fill_days":30,"reasons":["conf:0","win:late"],"computed_at":"2026-10-20T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/synthflow-ai-leadsenior-voip-engineer","json_url":"https://alion.io/job/synthflow-ai-leadsenior-voip-engineer.json","meta":{"generated_at":"2026-10-20T12:16:02Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":13542,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-21T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":6349},"rest":"https://alion.io/mcp/rest/get_company?id=6349"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fsynthflow-ai-leadsenior-voip-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fsynthflow-ai-leadsenior-voip-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fsynthflow-ai-leadsenior-voip-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/synthflow-ai-leadsenior-voip-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fsynthflow-ai-leadsenior-voip-engineer"}]}