{"id":2133196,"url":"https://alion.io/job/apple-cellular-protocol-stack-development-engineer-wireless-tech-and-ecosystems","title":"Cellular Protocol Stack Development Engineer, Wireless Tech and Ecosystems","company":{"id":12,"name":"Apple","domain":"apple.com","url":"https://alion.io/company/apple","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Apple Jobs","truth_index":{"grade":"B","score":75,"open_postings":925,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":49,"computed_at":"2026-10-10T05:45:15Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"junior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Beijing, China"],"countries":["CN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":23000,"max_usd":56000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":4417},"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Machine Learning","optional":true}],"status":"live","first_seen_at":"2026-08-03T08:50:54Z","employer_posted_date":"2026-10-09","last_verified_at":"2026-10-11T23:11:48Z","board_verified":true,"closed_at":null,"days_open":69,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":69},"description":"At Apple, we don’t just build products - we create experiences that redefine entire industries. It’s the diversity of our people and their ideas that fuels innovation across everything we do, from breakthrough technologies to industry-leading environmental efforts. Join the Wireless Technologies and Eco-Systems (WTE) organization and and drive innovation that matters!\nAs part of the Wireless team you we will be working on building solutions for Wireless technologies. We are looking for a highly reciprocal individual who can excel in a high-paced environment. Be ready to make something extraordinary when you come here. Dynamic, encouraging people and innovative, industry-defining technologies are the norm at Apple. The people who work here have reinvented and defined entire industries with our products and services. The same real passion for innovation also applies to our business practices - strengthening our dedication to leave the world better than we found it. You should join the Apple Wireless SW Developing Team if you want to help deliver the next amazing Apple product.\nDescription\nDesign and develop cellular protocol stack software.\nBring up iOS productions with cellular features.\nDiagnose, debug, and resolve cellular issues with rigorous root-cause methodology.\nAnalyze and optimize cellular performance through systematic analysis and data-driven refinement.\nSupport comprehensive production testing across all functional, performance and regulatory requirements.\nMinimum Qualifications\n2+ years of hands-on experience in a cellular protocol stack (NAS/RRC/PDCP/RLC/MAC) developing role.\nGood knowledge of wireless communication and computer networks.\nStrong troubleshooting and problem-solving skills.\nQuick learning capability in a fast-paced environment.\nFluent in both English and Chinese.\nPreferred Qualifications\nExperienced in cellular system design as plus.\nExperienced in LTE/NR firmware development as plus.\nDeep knowledge of LTE or NR cross layers as well as end to end system as plus.\nExperienced data analytic and data-informed solution design as plus.\nHands on experience in GenAI and machine learning as plus.","description_format":"text","description_chars":2152,"description_truncated":false,"requirements":{"experience_years_min":2,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Operating Systems","Laptops","Smartwatches & Fitness Trackers","Tablets"],"lifecycle":[{"event":"open","at":"2026-10-09T01:22:29Z"}],"visa":[],"liveness":{"score":16,"band":"cold","label":"Long shot","p_open":1,"p_active":0.362,"p_room":0.44,"age_days":67,"expected_fill_days":49,"reasons":["conf:2","stale_co","urgency","velocity","win:tail","crowd:junior,brand"],"computed_at":"2026-10-10T05:45:15Z"},"pay":null,"html_url":"https://alion.io/job/apple-cellular-protocol-stack-development-engineer-wireless-tech-and-ecosystems","json_url":"https://alion.io/job/apple-cellular-protocol-stack-development-engineer-wireless-tech-and-ecosystems.json","meta":{"generated_at":"2026-10-12T00:52:03Z","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":690,"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":12},"rest":"https://alion.io/mcp/rest/get_company?id=12"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fapple-cellular-protocol-stack-development-engineer-wireless-tech-and-ecosystems"},{"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%2Fapple-cellular-protocol-stack-development-engineer-wireless-tech-and-ecosystems"},{"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%2Fapple-cellular-protocol-stack-development-engineer-wireless-tech-and-ecosystems"},{"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/apple-cellular-protocol-stack-development-engineer-wireless-tech-and-ecosystems\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fapple-cellular-protocol-stack-development-engineer-wireless-tech-and-ecosystems"}]}