{"id":2570165,"url":"https://alion.io/job/tylsemi-ethernet-scale-up-rtl-leadprincipal-engineer","title":"Ethernet Scale-Up RTL Lead/Principal Engineer","company":{"id":4380397,"name":"TYLsemi","domain":"tylsemi.ai","url":"https://alion.io/company/tylsemi","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Rippling","truth_index":{"grade":"A","score":90,"open_postings":12,"ghost_share":0,"stale_share":0.417,"repost_share":0,"time_to_fill_p50_days":55,"computed_at":"2026-10-31T05:58:55Z"}},"role":"Hardware","role_family":"Hardware","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":["San Jose, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":164000,"max_usd":305000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":656},"experience_years_min":15,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"HPC","optional":false},{"name":"InfiniBand","optional":true},{"name":"OpenAI","optional":true}],"status":"live","first_seen_at":"2026-08-14T19:57:17Z","employer_posted_date":"2026-08-14","last_verified_at":"2026-10-31T11:01:23Z","board_verified":true,"closed_at":null,"days_open":77,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":77},"description":"About TYLsemi, Inc.\nThe Opportunity\nThe AI infrastructure market is exploding. Every hyperscaler, every cloud provider, every AI company is building custom silicon. But they all face the same problem: how do you connect hundreds of chips, deliver clean power at scale, and move terabits of data without melting the package?\nThat's what we solve. TYLsemi builds the chiplet infrastructure IP - the IO, power delivery, and interconnect building blocks - that makes AI/HPC systems actually work at scale.\nThis isn't a nice-to-have. It's the critical path.\nWhy Now\nThe Market Window\nThe semiconductor industry is going through its biggest architectural shift in 40 years:\nMoore's Law is dead. 2nm and beyond delivers marginal performance gains. The future is chiplets, not monolithic dies.\nCustom silicon is now mainstream. Google, Microsoft, Amazon, Meta, OpenAI - they're all designing their own ASICs. The $50B custom silicon market is growing 30% annually.\nIO and power are the bottleneck. Solve hard problems and provide something which is a category in itself.\nTranslation: We're entering the market at exactly the moment when every major AI/HPC player needs what we're building, and their alternatives are disappearing.\nCulture & Team: How We Work\nNo Politics, No Bureaucracy\nThere are no layers, no approval chains, no corporate theater.\nIf you have an idea, we test it. If it works, we ship it.\nNo endless meetings, no PowerPoint presentations to convince middle management.\nRemote-Friendly, Global Team\nUS team: Bay Area preferred, but we hire the best people regardless of location\nIndia team: Building a world-class design center in Bangalore\nMove Fast, Ship Real Products\nWe're not a research project. We have paying customers, committed capital, and aggressive timelines.\nThis is a company, not a lifestyle business. We're building to win.\nWhat We Value\nOwnership mindset. You're not here to execute someone else's roadmap. You're here to define it.\nBias for action. We move fast. Analysis paralysis doesn't fly here.\nDeep technical expertise. This is hard engineering. We need people who've shipped real silicon and debugged real hardware.\nLow ego, high standards. We don't care about titles or politics. We care about results.\nThe Ask\nIf you're reading this, you're probably comfortable. You have a good job at a stable company with all the benefits.\nWe're asking you to walk away from that and bet on us.\nHere's why you should:\nThe market is real. AI infrastructure spending is $200B+ annually and growing 40% YoY. Every hyperscaler needs what we're building.\nThe team has done this before. We've built and exited semiconductor companies at scale. This isn't our first rodeo.\nThe traction is de-risked. We have LOIs, strategic investors, and a clear path to revenue.\nThe work is consequential. You're not optimizing someone's ad click-through rate. You're building the silicon infrastructure that powers AI.\nThis is the bet. Join us and build something that matters.\nOr stay comfortable. No judgment.\nBut if you're the kind of person who wants to take the shot, we'd love to talk.\nREADY TO JOIN?\nRole Overview\nTYLsemiis developingpurpose-built connectivity chiplet for HPC/rack-scale AI systems. We are seeking a Principal Engineer Ethernet Scale-up tolead the architecture and design of next-generationEthernet Scale-Up Networking (ESUN) solution. This is a high-impact technical role.\nWhat You'll Do\nDefine architecture for Ethernet-based AI scale-upinterconnects andaccelerator fabrics.\nLead development of high-performanceEthernet Subsystemmicroarchitectures including RDMA, packet processing,network offload,traffic management, congestion control, and reliability mechanisms.\nDrive execution from architecture through RTL, verification, physical design, silicon bring-up, and production.\nOptimizeperformance, latency, scalability, power, and reliability for demanding AI and HPC workloads.\nCollaborate across hardware, firmware, software, and system teams to deliver industry-leading AI networking solutions.\nServe as a company-wide technical leader, influencing product strategy, roadmap, and architectural direction.\nWhat We're Looking For\n15+ years of ASIC/SoC architecture and design experience.\nProventrack recorddelivering networking, NIC, switch, DPU, accelerator interconnect, or high-speed connectivity silicon.\nDeepexpertiseinSystemVerilog/RTL design and high-performancedatapatharchitecture.\nStrong knowledge of Ethernet, RDMA, traffic management, congestion control, and scalable fabric architectures.\nExperience across the full ASIC lifecycle, from architecture toproductionsilicon.\nGood to Have\nUltra Ethernet,UALink, RoCEv2, InfiniBand\nPCIe Gen6/Gen7, UCIe, CXL\nAI/HPC interconnects and collective communication acceleration\n400G/800G/1.6T Ethernet systems\nHigh-speed SerDes and advanced networking architectures\nSuccess in This Role Looks Like\nEthernet Scale-Up Networking architecture is defined and validated for next-gen HPC/rack-scale AI systems, with clear technical direction across accelerator fabrics.\nHigh-performance Ethernet subsystem microarchitecture (RDMA, packet processing, offload, traffic management, congestion control) is delivered on schedule and meets production-quality reliability bars.\nPrograms move cleanly from architecture through RTL, verification, physical design, and silicon bring-up with minimal rework.\nPerformance, latency, power, and reliability targets are met or exceeded for demanding AI/HPC workloads.\nCross-functional teams (hardware, firmware, software, systems) are aligned and unblocked, with this role recognized as a trusted technical authority shaping product strategy and roadmap.\nCompensation:\nThe compensation range shown below represents total target cash compensation and includes both base salary and target bonus. Actual compensation will vary based on factors such as experience, skills, qualifications, job level, and work location.\nIn addition to cash compensation, this position is eligible for equity in the form of stock options, giving you the opportunity to share in the Company’s long-term growth and success.","description_format":"text","description_chars":6106,"description_truncated":false,"requirements":{"experience_years_min":15,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Equity","Stock options"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["AI Chips & Accelerators","Semiconductor IP & Chip Design Services"],"lifecycle":[{"event":"open","at":"2026-10-14T22:44:48Z"}],"visa":[],"liveness":{"score":40,"band":"fade","label":"Fading","p_open":1,"p_active":0.723,"p_room":0.55,"age_days":77,"expected_fill_days":55,"reasons":["conf:2","velocity","win:tail"],"computed_at":"2026-10-31T05:58:55Z"},"pay":null,"html_url":"https://alion.io/job/tylsemi-ethernet-scale-up-rtl-leadprincipal-engineer","json_url":"https://alion.io/job/tylsemi-ethernet-scale-up-rtl-leadprincipal-engineer.json","meta":{"generated_at":"2026-10-31T14:27:50Z","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":22485,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-01T00:00:00Z"}},"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":4380397},"rest":"https://alion.io/mcp/rest/get_company?id=4380397"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ftylsemi-ethernet-scale-up-rtl-leadprincipal-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%2Ftylsemi-ethernet-scale-up-rtl-leadprincipal-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%2Ftylsemi-ethernet-scale-up-rtl-leadprincipal-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/tylsemi-ethernet-scale-up-rtl-leadprincipal-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ftylsemi-ethernet-scale-up-rtl-leadprincipal-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":2570165}},{"tool":"search_jobs","arguments":{"company":"tylsemi.ai","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":2570165},"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. Docs: https://alion.io/developers"}}