{"id":2046047,"url":"https://alion.io/job/dogesms-telecom-network-engineer-ss7-smsc","title":"Telecom Network Engineer (SS7 / SMSC)","company":{"id":2430436,"name":"DogeSMS","domain":"dogesms.com","url":"https://alion.io/company/dogesms","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Schema","truth_index":null},"role":"Networking","role_family":"Networking","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Tallinn, Estonia"],"countries":["EE"],"hiring_countries":["EE","LT"],"hiring_countries_total":2,"salary":{"min":70000,"max":150000,"currency":"USD","period":"year","gross":null,"usd_annual":150000},"salary_estimate":null,"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Go","optional":false},{"name":"Java","optional":false},{"name":"Linux","optional":false},{"name":"OpenTelemetry","optional":false},{"name":"Rest API","optional":false},{"name":"Rust","optional":false},{"name":"SigNoz","optional":false},{"name":"Wireshark","optional":false}],"status":"live","first_seen_at":"2026-10-01T00:00:00Z","employer_posted_date":"2026-10-07","last_verified_at":"2026-10-12T02:29:58Z","board_verified":true,"closed_at":null,"days_open":11,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":11},"description":"About the role\nMost \"SMS API\" companies are a thin REST surface in front of a single upstream intermediary. We are not. DogeSMS is moving up the stack - first as a CLEC-style direct operator in North America (ISP Telecom on the +1 footprint), then through additional licensed footholds in Europe and APAC. That means owning the actual signalling and message-transit layers, not just the customer-facing API. This role sits at that boundary.\nThe day-to-day is unglamorous in the way that real telecom work is unglamorous: SS7 / SIGTRAN over M3UA for legacy interconnects, SMPP 3.4 / 5.0 toward operator SMSCs, Diameter for LTE / 5G-NSA charging and routing, GSM MAP for MO / MT-SMS at the application layer, and the boring but mandatory parts - HLR / HSS subscriber lookups, SCCP global title translation, MAP-PhaseN compatibility quirks, MNP (number portability) dips. You will design and operate the integration between our Go message-pipeline and the carrier-grade signalling stack (commercial or open-source - Mavenir, RestComm jSS7, Kannel, OpenBSC heritage code), make sure the signalling interconnects stay up across maintenance windows, and explain to backend engineers why \"just retry the SMPP submit\" is a category error.\nThis is a hire for someone who has actually worked at a carrier, MVNO, or signalling-as-a-service operator - not someone who has only read the specs. We do not need ten of these. We need one who is unmistakably the person to call.\nWhat you'll do\nOwn DogeSMS's signalling-layer architecture across SS7 / SIGTRAN (M3UA, SCCP, TCAP, MAP) and Diameter (S6a/d, Gy/Ro for LTE/5G-NSA), including capacity planning for SMSC throughput and HLR query rates.\nRun the SMPP termination fleet: bind-receiver / bind-transceiver lifecycle, throughput pacing, DLR (delivery receipt) correlation, and integration with the Go pipeline's order state machine.\nOperate our MAP-layer interface for MO-SMS (Mobile Originated) reception on the ISP Telecom +1 footprint - windowing, MAP-PhaseN negotiation, abort-handling for malformed TCAP dialogues.\nDesign the GSM / LTE / 5G NSA roaming and number-portability (MNP) dip strategy: when to consult an HLR / HSS, when to use a third-party dip service, how to cache without burning operator goodwill.\nPartner with the Go backend team on the wire-protocol boundary: define internal contracts between the signalling stack and the order pipeline, instrument every PDU class with OpenTelemetry, drive postmortems when packet-level pathology shows up as user-visible failure.\nLead the technical conversation with new carrier and signalling-stack counterparties - what does their SMSC support, which MAP phase, what Diameter AVPs are mandatory, how do they handle SMS over IMS (SIP MESSAGE / SMSoIP).\nWhat we expect\n7+ years inside the actual telecom industry - at a Tier-1 MNO, an MVNO with a real signalling stack, an SMSC platform builder (Mavenir / Sinch / Comviva / Mobixell), or a signalling-as-a-service operator (NetNumber, iconectiv, Tata Communications).\nHands-on operational experience with at least three of: SS7 over SIGTRAN (M3UA), GSM MAP, SMPP 3.4 / 5.0, Diameter, SIP / SMS over IMS. Spec-only knowledge does not count - we will ask about quirks that only appear in production.\nWorking comfort with HLR / HSS, SCCP global title translation, GSM short-message routing, and number-portability dips against operator-specific NP databases.\nLinux fundamentals (tshark / Wireshark with SS7 dissectors, perf / bpftrace for kernel-side debugging, systemd for production daemons). You are not afraid of legacy stacks written in C or Java that pre-date your tenure.\nCalm demeanor on signalling incidents - when a Diameter peer flaps at 3AM you do not panic, you read the connection trace and you know what AVP went wrong.\nBonus: regulatory familiarity with EE / LT / EU CLEC licensing, GSMA IR.74 / IR.71 messaging interop, or Canadian CLEC obligations (we have an ISP Telecom partnership in flight that hits all three).\nStack we use\nSS7 / SIGTRAN signalling: commercial implementations (Mavenir, NetNumber) and/or open-source heritage (RestComm jSS7, OpenSS7, Kannel for SMPP / WAP termination). SMPP termination toward carrier SMSCs over TLS where supported. Diameter for LTE/5G-NSA via commercial stacks (sm9s, freeDiameter). The Go backend speaks to this layer over well-defined internal RPC - you own the contract on the signalling side, the Go team owns it on the pipeline side. OpenTelemetry per PDU class, SigNoz dashboards, Lark on-call for signalling incidents.\nNo \"let's rewrite SS7 in Rust.\" No greenfield-or-bust attitude. The whole point of this lane is that telecom is a 40-year-old discipline and our job is to interoperate with it correctly, not to declare it obsolete.\nCompensation\n$70,000-$150,000 USD annually. Real signalling engineers in Tallinn and Vilnius are a small, specialized labor market - the upper band reflects that scarcity and is reserved for someone with named SS7 / Diameter production experience at a Tier-1 carrier or signalling-platform builder. Pay is in USD, structured as either Estonian / Lithuanian employment with full local benefits or USD contractor invoice depending on your situation. Equity available for full-time hires. We cover certification fees for relevant industry training (GSMA, Mobileum, Mavenir certifications).\nHiring process\nSubmit via the talent pool form linked on /careers/openings/telecom-network-engineer. One paragraph on the most operationally painful signalling incident you have personally resolved - what protocol, what symptom, what root cause, what the fix was.\n60-minute technical conversation with a co-founder + an external advisor we work with from the carrier side. We will trade pcaps and ask you to walk us through what is wrong with one.\nPaid scoped exercise ($400 USD): given a representative SMPP / MAP scenario, sketch the integration architecture with our Go pipeline and identify three failure modes you would instrument first. Scoped to one calendar week, ~6 hours of effort.\n2-week paid trial project ($1,200 USD): a real piece of the ISP Telecom integration work - we deliberately do not gate this behind theatre; you get a real ticket and we observe how you think through it.","description_format":"text","description_chars":6223,"description_truncated":false,"requirements":{"experience_years_min":7,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Equity"],"hiring_locations":[{"name":"Estonia","iso":"EE","kind":"country"},{"name":"Lithuania","iso":"LT","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-07T19:34:51Z"}],"visa":[],"liveness":{"score":78,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.828,"p_room":0.945,"age_days":11,"expected_fill_days":29,"reasons":["conf:4","urgency","win:mid"],"computed_at":"2026-10-12T06:55:09Z"},"pay":{"stated_usd_annual":150000,"is_top_pay":false},"html_url":"https://alion.io/job/dogesms-telecom-network-engineer-ss7-smsc","json_url":"https://alion.io/job/dogesms-telecom-network-engineer-ss7-smsc.json","meta":{"generated_at":"2026-10-12T13:10:04Z","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":20591,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-13T00:00:00Z"}},"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":2430436},"rest":"https://alion.io/mcp/rest/get_company?id=2430436"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fdogesms-telecom-network-engineer-ss7-smsc"},{"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%2Fdogesms-telecom-network-engineer-ss7-smsc"},{"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%2Fdogesms-telecom-network-engineer-ss7-smsc"},{"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/dogesms-telecom-network-engineer-ss7-smsc\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fdogesms-telecom-network-engineer-ss7-smsc"}]}