{"id":4275469,"url":"https://alion.io/job/textnow-mobile-core-engineer-carrier","title":"Mobile Core Engineer, Carrier","company":{"id":686311,"name":"TextNow","domain":"textnow.com","url":"https://alion.io/company/textnow-2","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"A","score":95,"open_postings":25,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":141,"computed_at":"2026-11-12T10:38:37Z"}},"role":"Mobile","role_family":"Mobile","seniority":"senior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Canada"],"countries":["CA"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":158000,"max":207000,"currency":"CAD","period":"year","gross":null,"usd_annual":145132},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"AWS","optional":false},{"name":"Go","optional":true},{"name":"kubectl","optional":true},{"name":"Kubernetes","optional":true},{"name":"Python","optional":true}],"status":"live","first_seen_at":"2026-11-13T15:39:07Z","employer_posted_date":"2026-11-13","last_verified_at":"2026-11-14T00:39:50Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"TextNow is a full MVNO. We run our own converged 4G/5G mobile core in AWS for hundreds of thousands of subscribers, growing toward millions, and we're growing the team that owns and evolves it. AI is built into how this team works: it's how a small team operates, triages and changes a network this size.\nAbout the role\nYou've run a mobile core at a carrier and want to do it on a cloud-native platform. You'll be the person on the team who knows what the network is supposed to do: how an attach should flow, why a Diameter or SIP request failed, what a policy rule does to a subscriber's traffic.\nYou'll work alongside our SRE, who owns the cloud platform, and developers who build the services around the core.\nWhere you'll work: remote anywhere in the US or Canada, with working hours that overlap Eastern time. You'll travel to our Waterloo office a few times a year to work in the device lab and meet the team, so you need to be able to travel to Canada.\nWhat you'll do\nOperate our converged 4G/5G core: packet core, IMS, HSS/UDM and related network functions.\nDefine what we monitor: the alarms, KPIs and thresholds that matter, wired into paging with SRE.\nOwn config changes: change plans, rollback criteria and impact analysis, shipped through the change pipeline our SRE runs.\nValidate vendor software in our lab before it reaches production.\n Own capacity and SIMs: subscriber, session and license headroom, SIM management and over-the-air (OTA) updates.\n Lead partner and device onboarding: devices (UE), roaming partners and SIM profiles. You'll learn the parts that are new to you and lead the area.\nLead core incidents: protocol, charging and policy issues. Read the capture, find the cause.\nLead voice interconnect and roaming signalling: SBCs and SIP trunks, Diameter routing and IPX, and signalling security, so fraud and spoofed signalling get caught early. You'll learn the parts that are new to you.\nKeep lawful intercept working with the team, with checks so changes don't break it.\nWork with our vendor on defects, bringing evidence to every escalation and pushing for root causes that hold up.\nTeach the automation what good looks like. Turn your network knowledge into runbooks, health checks and investigation steps that AI agents can follow. Lead on core alarm correlation, config change auditing and unusual call or data session patterns.\nBring the team up to speed. The SRE and developers all ramp up on the core and share on-call for it with you. You set the direction for the core, and the team shares the load.\nUse AI across the job: triaging alarms, reading logs and captures, digging through vendor docs, drafting change plans.\nWho you are\n5+ years operating a live mobile core in production for an operator (carrier, MVNO or MVNE). Vendor experience counts if you were on call for a customer's live network\nHands-on EPC/5GC packet core (PGW, SMF, UPF); working knowledge of IMS\nWorking knowledge of policy and charging (PCRF/PCF, OCS, quota enforcement)\nComfortable reading and dissecting a packet capture end to end\nYou've written and run MOPs, upgrades and maintenance windows in production\nYou've led production incidents\nComfortable deciding what \"correct\" looks like when nobody else knows\nYou don't settle for how things have always been done. You look for better ways to run the network, even when \"that's how carriers do it\" is the easy answer\nYou already use AI to triage, analyze logs and captures, and automate the repetitive parts of operations\nNice to have\nAlarm correlation or noise reduction on vendor network function alarms, or automated runbooks for core operations\nCloud-native network functions on Kubernetes\nDPI-based traffic classification\nOnboarding and troubleshooting devices (UE)\nWorking with GSMA roaming specs (IR.21, IR.88)\nPython or Go, git, kubectl\nBase Salary Range\nThe expected base salary range for this role is: \nCanada Senior: CAD $158,000 - 207,000 annually \nCanada Staff: CAD $200,400 - 248,000 annually \nOur salary ranges are determined by role, level, and location. Within the range, individual pay is determined by job-related skills, experience, and relevant education or training. \nOur goal is to offer a competitive package that reflects the impact and expertise you bring to the team. \nThis posting is for a current, active vacancy.\nMore about TextNow \nOur culture \nWe’re proud of the culture that we’ve built at TextNow, but one of the most common questions we hear is ‘how do you continue to sustain it as the world and the company continues to change?’ The reality is that we’re only able to keep up because each and every TextNovian contributes to our culture through being involved, by living our values, sharing feedback, embracing change and more! \nOur values \nCustomer Obsessed \nWe strive to have a deep understanding of our customers. \nDo Right By Our People \nWe treat each other with fairness, respect, and integrity. \nAccept the Challenge \nWe adopt a \"Yes, We Can\" mindset to achieve ambitious goals. \nAct Like an Owner \nWe treat this company like it's our own... because it is! \nGive a Damn \nWe are deeply committed and passionate about our work and achieving results. \n Our benefits and more \nThis is a brief overview of the benefits that TextNow offers its employees. More complete details can be found in TextNow’s Benefit Guide and legal plan documents, which are available to employees on or shortly after their start date with TextNow. The benefits listed herein are for illustrative purposes only and may change from time-to-time in TextNow’s sole discretion. \nFree phone service \nStrong work life blend \nEmployee stock options \nUnlimited vacation \n12 paid holidays per year \nCompetitive pay \nHealth, dental, and vision benefits \nShort-term & long-term disability \n$750 annual wellness benefit or healthcare spending account \nRRSP matching (Canada)\nParental leave for eligible employees \nLearning & Development opportunities\nWe travel a few times a year for various team events, company-wide off-sites, and more \nMore information about our total rewards package will be available during the hiring process. \nDogfooding & Customer Obsession \nAt TextNow, every employee gets to actively use our app for calling and texting. Dogfooding helps us experience what customers do, to spot issues early, and drive better design, developer, and user experiences. \nDiversity and Inclusion \nOur aim is to make every person who joins TextNow feel like they belong, that they’re valued, and that they’re able to be their authentic selves at work. \nWe’re all accountable for creating an inclusive culture and a sense of belonging for one another. By doing this together, we’ll make TextNow better for everyone. \nEqual opportunity \nWe are an equal opportunity employer and are committed to creating an inclusive environment for all employees. We consider all qualified applicants without regard to race, color, religion, sex, gender identity or expression, sexual orientation, age, disability, or any other protected characteristic. \nApplicants who require reasonable accommodation during the hiring process may contact our Talent Team. \nTextNow Candidate Policy \nBy submitting an application to TextNow, you agree to the collection, use, and disclosure of your personal information in accordance with the TextNow Candidate Policy","description_format":"text","description_chars":7312,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Parental leave"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"},{"name":"Canada","iso":"CA","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Messaging Apps"],"lifecycle":[{"event":"open","at":"2026-11-13T18:50:54Z"}],"visa":[{"country":"CA","licensed_sponsor":true,"adverts_offering_sponsorship_24m":0,"sanctioned_now":false,"evidence":"Approved LMIA in the last two years","filings_12m":0,"filings_prev_12m":3,"green_card_filings_12m":null,"median_offered_wage_usd":null,"route":null,"cap_exempt":false,"checked_at":"2026-11-12T07:36:15+00:00","sources":["ESDC: employers issued a positive LMIA"],"filings_for_role_12m":0}],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":141,"reasons":["conf:4","win:early"],"computed_at":"2026-11-14T04:47:06Z"},"pay":{"stated_usd_annual":145132,"is_top_pay":false},"html_url":"https://alion.io/job/textnow-mobile-core-engineer-carrier","json_url":"https://alion.io/job/textnow-mobile-core-engineer-carrier.json","meta":{"generated_at":"2026-11-14T04:47:06Z","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":7828,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-15T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":686311},"rest":"https://alion.io/mcp/rest/get_company?id=686311"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ftextnow-mobile-core-engineer-carrier"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"free","price":{"credits":0,"usd":0},"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%2Ftextnow-mobile-core-engineer-carrier"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Ftextnow-mobile-core-engineer-carrier"},{"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/textnow-mobile-core-engineer-carrier\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ftextnow-mobile-core-engineer-carrier"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4275469}},{"tool":"search_jobs","arguments":{"company":"textnow.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4275469},"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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