{"id":3527989,"url":"https://alion.io/job/nairon-cloud-telco-engineer-sip-reliability","title":"Cloud & Telco Engineer (SIP / Reliability)","company":{"id":684130,"name":"NAIRON","domain":"nairon.ai","url":"https://alion.io/company/nairon","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Join","truth_index":null},"role":"DevOps","role_family":"DevOps","seniority":null,"employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":[],"countries":[],"hiring_countries":["GR"],"hiring_countries_total":1,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ArgoCD","optional":false},{"name":"AWS","optional":false},{"name":"GitOps","optional":false},{"name":"Grafana","optional":false},{"name":"Helm","optional":false},{"name":"Kubernetes","optional":false},{"name":"Linux","optional":false},{"name":"OpenTelemetry","optional":false},{"name":"Terraform","optional":false},{"name":"Voice Agents","optional":false},{"name":"Wireshark","optional":false},{"name":"AI Agents","optional":true},{"name":"IAM","optional":true},{"name":"LiveKit","optional":true},{"name":"Python","optional":true},{"name":"WebRTC","optional":true}],"status":"live","first_seen_at":"2026-10-30T14:54:27Z","employer_posted_date":"2026-10-30","last_verified_at":"2026-11-04T04:42:27Z","board_verified":true,"closed_at":null,"days_open":4,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":4},"description":"Intro\nFor this position we are only looking for candidates located in Greece.\nNairon GmbH is a Swiss startup building AI voice agents that answer and make phone calls for businesses. Our platform runs real-time conversations over the phone and on the web, connected to our customers' telephony and business tools. We value clear communication, thoughtful engineering, and a collaborative approach to problem-solving. Join us as we continue to develop tools that make a difference.\nYou will own the hardest reliability problems on our platform: the telco edge where phone calls enter and leave, and the cloud infrastructure underneath that has to stay up during live calls.\nTasks\nAs a Cloud & Telco Engineer at Nairon GmbH, your responsibilities will include:\nRunning and hardening our SIP edge: Kamailio-based session border controllers, carrier and customer SIP trunks, PBX integrations, TLS and SRTP.\nMaking calls survive failures: redundancy, failover between zones and providers, graceful draining and releases without dropped calls.\nTroubleshooting call quality at SIP and RTP level: NAT traversal, codecs, DTMF, one-way audio, transfers and re-INVITEs.\nRunning Kubernetes on AWS and European clouds with GitOps (Argo CD, Helm) and Terraform.\nObservability and incident response: metrics, logs and traces (OpenTelemetry, Grafana), alerting, runbooks and postmortems.\nLoad testing, capacity planning and cost at the edge.\nRequirements\nExperience:\nSeveral years running production infrastructure where downtime is visible to customers, ideally in telecom, VoIP or real-time media.\nTechnical Skills:\nRequired:\nSIP in production: trunks, registrations, REFER and re-INVITE, NAT traversal, RTP, codecs and DTMF.\nRouting logic in a SIP proxy such as Kamailio or OpenSIPS; GUI-only PBX administration is not enough.\nLinux networking and packet-level troubleshooting (sngrep, Wireshark, SIPp).\nKubernetes in production and infrastructure as code (Terraform or similar).\nNice to have:\nAWS networking (VPC, load balancers, IAM) and multi-region or multi-provider setups.\nRTPengine, FreeSWITCH or Asterisk; LiveKit or WebRTC.\nCarrier interconnects and number porting, in Greece or in the German-speaking markets we serve.\nPython or Go for tooling and automation.\nCommunication:\nEnglish proficiency is essential, both written and spoken, as it is the working language for all positions.\nSoft Skills:\nCalm during incidents; you find the root cause and write it down.\nYou prefer boring, reliable systems over clever ones.\nOwnership: a call path that breaks is your problem until it is fixed.\nBenefits\nFlexible Work Setup: Work fully remotely or from a co-working space - whichever suits you best.\nEquipment Provided: Company laptop and phone provided for all employees.\nCollaborative Environment: Join a small, agile team where your contributions have a direct impact.\n Growth Opportunities: Own the path of every call, from the carrier to the AI agent.\nClosing\nIf you enjoy making phone calls and infrastructure work reliably under real load, we'd love to hear from you.","description_format":"text","description_chars":3062,"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":[{"language":"German","level":"All levels","optional":true},{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":["Flexible schedule","Growth opportunities"],"hiring_locations":[{"name":"Greece","iso":"GR","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Machine Learning","Contact Center Software"],"lifecycle":[{"event":"open","at":"2026-10-30T14:56:38Z"}],"visa":[],"liveness":{"score":85,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.851,"p_room":1,"age_days":4,"expected_fill_days":19,"reasons":["conf:1","win:early"],"computed_at":"2026-11-04T06:34:25Z"},"pay":null,"html_url":"https://alion.io/job/nairon-cloud-telco-engineer-sip-reliability","json_url":"https://alion.io/job/nairon-cloud-telco-engineer-sip-reliability.json","meta":{"generated_at":"2026-11-04T07:28:16Z","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":11628,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-05T00:00:00Z"}},"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":684130},"rest":"https://alion.io/mcp/rest/get_company?id=684130"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fnairon-cloud-telco-engineer-sip-reliability"},{"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%2Fnairon-cloud-telco-engineer-sip-reliability"},{"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%2Fnairon-cloud-telco-engineer-sip-reliability"},{"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/nairon-cloud-telco-engineer-sip-reliability\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fnairon-cloud-telco-engineer-sip-reliability"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3527989}},{"tool":"search_jobs","arguments":{"company":"nairon.ai","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3527989},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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