{"schemaVersion":"jobsearcher.job.v1","id":"d630f323cbe4da47c1e5e2fd","url":"https://jobsearcher.com/jobs/d630f323cbe4da47c1e5e2fd","canonicalUrl":"https://jobsearcher.com/jobs/d630f323cbe4da47c1e5e2fd","title":"RF Test & Systems Engineer","description":"About Oso Semiconductor\nOso Semiconductor is an early‑stage fabless semiconductor company developing next‑generation mmWave beamforming technology. Founded by UC Berkeley PhDs, our proprietary RFIC architecture delivers 2–4x power reduction for phased array systems across satellite communication (SATCOM), 5G, and radar. We’ve raised Series A funding, secured our first defense and commercial customers, and are preparing to scale the team 3X.\n\nThe Role\nWe are looking for an RF Test & Systems Engineer to own the testing, characterization, and system‑level validation of our mmWave beamforming chips and phased array platforms. This role sits at the intersection of RF testing, systems design, and applications engineering—you will prove our silicon works, build the systems around it, and help customers integrate it.\n\nResponsibilities\n\nDesign, execute, and automate RF bench‑top and over‑the‑air test plans for custom RFIC chipsets and phased array antennas. Own chip‑level and system‑level characterization.\n\nArchitect and build phased array evaluation systems—PCB design, antenna integration, packaging interfaces, RF signal chain assembly.\n\nPerform EM simulation of phased arrays, RF passives, chip packages, PCBs, and antennas using Ansys HFSS and ADS Momentum. System‑level signal chain modeling using MATLAB, Python, or Keysight SystemVue.\n\nDevelop evaluation kits, reference designs, and technical documentation. Support customer design‑in activities.\n\nBuild and maintain RF test infrastructure including automation scripts (Python), calibration procedures, and measurement workflows.\n\nWork with RFIC designers, founding team, and customers to translate test results into design feedback.\n\nRequired Qualifications\n\n5+ years in RF/mmWave testing, system design, or applications engineering.\n\nProficient with RF test equipment: VNAs, spectrum analyzers, signal generators, power meters, and over‑the‑air test setups.\n\nExperience automating test equipment using Python and building repeatable measurement workflows.\n\nExperience in high‑frequency (>6 GHz) phased array antenna PCB design, layout, and testing using Altium.\n\nComfortable with EM simulation tools (Ansys HFSS, ADS Momentum) for antenna and package analysis.\n\nStrong understanding of RF front‑end circuit blocks and theory.\n\nAdvanced degree (MS/PhD) in EE or significant industry experience.\n\nPreferred Qualifications\n\nTheoretical expertise in multi‑antenna wireless systems and phased array beamforming.\n\nSystem‑level signal chain modeling (MATLAB, Python, Keysight SystemVue).\n\nPrior FAE or customer‑facing technical role at a semiconductor company.\n\nExperience developing evaluation boards, reference designs, or customer hardware.\n\nFamiliarity with chip packaging and its impact on RF performance at mmWave.\n\nSelf‑directed: takes ownership, builds what’s needed, doesn’t wait to be told.\n\nWhy Oso\n\nFull ownership: Own the test and validation pipeline for a first‑of‑a‑kind mmWave beamforming platform.\n\nBridge role: Your work directly determines how our technology gets adopted by customers.\n\nMeaningful equity: Competitive stock option grant with real upside.\n\nUC Berkeley DNA: Work alongside PhDs with deep domain expertise.\n\nDual‑market: Defense (SATCOM, radar) and commercial (5G).\n\nWhat We Offer\n\nEquity: Stock option grant with 4‑year vesting and 1‑year cliff.\n\nMedical, Dental & Vision: Comprehensive health coverage with employer‑sponsored medical, dental, and vision plans.\n\nHybrid Schedule: Monday–Wednesday in office.\n\nTime Off: Unlimited PTO.\n\n401(k): Employer‑matched retirement plan.\n\nParental Leave: Equal parental leave for all parents.\n\nTeam Culture: Regular team lunches, events, and celebrations.\n\nLife Insurance: Company‑paid life insurance.\n\nFSA & HSA: Flexible spending and health savings account options available.\n\nCommuter Benefits: Pre‑tax transit and parking benefits.\n\nOso Semiconductor is an equal opportunity employer. We consider all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any other protected characteristic.\n\n#J-18808-Ljbffr","company":"Mixmode","rawCompany":"mixmode","city":"Mountain View","state":"CA","isRemote":false,"isActive":true,"createdAt":"2026-06-18T03:23:52.628Z","occupations":[{"code":"17-2072.00","title":"Electronics Engineers, Except Computer","slug":"electronics-engineers-except-computer"},{"code":"17-2199.00","title":"Engineers, All Other","slug":"engineers-all-other"},{"code":"15-1241.01","title":"Telecommunications Engineering Specialists","slug":"telecommunications-engineering-specialists"}],"industries":[{"code":"334220","title":"Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing","slug":"radio-and-television-broadcasting-and-wireless-communications-equipment-manufacturing"},{"code":"541715","title":"Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)","slug":"research-and-development-in-the-physical-engineering-and-life-sciences-except-nanotechnology-and-biotechnology"},{"code":"334419","title":"Other Electronic Component Manufacturing","slug":"other-electronic-component-manufacturing"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"RF Test & Systems Engineer","description":"About Oso Semiconductor\nOso Semiconductor is an early‑stage fabless semiconductor company developing next‑generation mmWave beamforming technology. Founded by UC Berkeley PhDs, our proprietary RFIC architecture delivers 2–4x power reduction for phased array systems across satellite communication (SATCOM), 5G, and radar. We’ve raised Series A funding, secured our first defense and commercial customers, and are preparing to scale the team 3X.\n\nThe Role\nWe are looking for an RF Test & Systems Engineer to own the testing, characterization, and system‑level validation of our mmWave beamforming chips and phased array platforms. This role sits at the intersection of RF testing, systems design, and applications engineering—you will prove our silicon works, build the systems around it, and help customers integrate it.\n\nResponsibilities\n\nDesign, execute, and automate RF bench‑top and over‑the‑air test plans for custom RFIC chipsets and phased array antennas. Own chip‑level and system‑level characterization.\n\nArchitect and build phased array evaluation systems—PCB design, antenna integration, packaging interfaces, RF signal chain assembly.\n\nPerform EM simulation of phased arrays, RF passives, chip packages, PCBs, and antennas using Ansys HFSS and ADS Momentum. System‑level signal chain modeling using MATLAB, Python, or Keysight SystemVue.\n\nDevelop evaluation kits, reference designs, and technical documentation. Support customer design‑in activities.\n\nBuild and maintain RF test infrastructure including automation scripts (Python), calibration procedures, and measurement workflows.\n\nWork with RFIC designers, founding team, and customers to translate test results into design feedback.\n\nRequired Qualifications\n\n5+ years in RF/mmWave testing, system design, or applications engineering.\n\nProficient with RF test equipment: VNAs, spectrum analyzers, signal generators, power meters, and over‑the‑air test setups.\n\nExperience automating test equipment using Python and building repeatable measurement workflows.\n\nExperience in high‑frequency (>6 GHz) phased array antenna PCB design, layout, and testing using Altium.\n\nComfortable with EM simulation tools (Ansys HFSS, ADS Momentum) for antenna and package analysis.\n\nStrong understanding of RF front‑end circuit blocks and theory.\n\nAdvanced degree (MS/PhD) in EE or significant industry experience.\n\nPreferred Qualifications\n\nTheoretical expertise in multi‑antenna wireless systems and phased array beamforming.\n\nSystem‑level signal chain modeling (MATLAB, Python, Keysight SystemVue).\n\nPrior FAE or customer‑facing technical role at a semiconductor company.\n\nExperience developing evaluation boards, reference designs, or customer hardware.\n\nFamiliarity with chip packaging and its impact on RF performance at mmWave.\n\nSelf‑directed: takes ownership, builds what’s needed, doesn’t wait to be told.\n\nWhy Oso\n\nFull ownership: Own the test and validation pipeline for a first‑of‑a‑kind mmWave beamforming platform.\n\nBridge role: Your work directly determines how our technology gets adopted by customers.\n\nMeaningful equity: Competitive stock option grant with real upside.\n\nUC Berkeley DNA: Work alongside PhDs with deep domain expertise.\n\nDual‑market: Defense (SATCOM, radar) and commercial (5G).\n\nWhat We Offer\n\nEquity: Stock option grant with 4‑year vesting and 1‑year cliff.\n\nMedical, Dental & Vision: Comprehensive health coverage with employer‑sponsored medical, dental, and vision plans.\n\nHybrid Schedule: Monday–Wednesday in office.\n\nTime Off: Unlimited PTO.\n\n401(k): Employer‑matched retirement plan.\n\nParental Leave: Equal parental leave for all parents.\n\nTeam Culture: Regular team lunches, events, and celebrations.\n\nLife Insurance: Company‑paid life insurance.\n\nFSA & HSA: Flexible spending and health savings account options available.\n\nCommuter Benefits: Pre‑tax transit and parking benefits.\n\nOso Semiconductor is an equal opportunity employer. We consider all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any other protected characteristic.\n\n#J-18808-Ljbffr","datePosted":"2026-06-18T03:23:52.628Z","dateModified":"2026-06-18T03:23:52.628Z","hiringOrganization":{"@type":"Organization","name":"Mixmode","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Mountain View","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"d630f323cbe4da47c1e5e2fd"},"url":"https://jobsearcher.com/jobs/d630f323cbe4da47c1e5e2fd"}}