Staff Wireless Systems Design Engineer

InnoPhase Inc. DBA GreenWave Radios™ is at the forefront of innovation in Open RAN digital radios. Our cutting-edge solutions powered by the Hermes64 RF SoC are designed to enhance network energy efficiency while dramatically reducing operational expenses with purpose-built silicon that is the heart of ORAN-based active antenna arrays. Headquartered in San Diego California GreenWave Radios™ has established itself as a pioneer in delivering power-efficient digital-to-RF solutions. The company is supported by a talented team of over 100 engineers spread across four global R&D facilities. With an extensive portfolio of more than 120 global patents GreenWave Radios™ continues to push the boundaries of radio technology and innovation. To learn more about GreenWave Radios™ and hear what our employees have to say visit the GreenWave™ certification profile at GreatPlacetoWork.com or explore our Home - GreenWave Radios website.

About the Role

GreenWave Radios is building the next generation of Cellular Infrastructure Radio solutions and we're looking for a Staff DSP Systems Design Engineer to own end-to-end system architecture for our 5G NR and O-RAN product lines. You'll translate real-world RF and protocol requirements into silicon-level specs working at the intersection of RF baseband and massive MIMO — all the way from architecture to lab validation. This is a hands-on high-impact role at a company that ships.

What You'll Do

Define and own system-level architecture for cellular SoCs including link budgets system partitioning mMIMO beamforming chain design and performance trade-off analysis Architect and specify O-RAN compliant subsystems — define split options (7.2x 6

• fronthaul interface requirements and RU/DU functional partitioning in coordination with protocol and firmware teams Develop and maintain detailed system specifications covering RF front-end baseband clocking power and RF/digital interfaces serving as the authoritative reference for IC design teams Build and run system simulations (RF link mMIMO beamforming gain interference EVM sensitivity dynamic range) to validate architecture decisions before tape-out Lead lab bring-up and characterization of prototype hardware including hands-on use of spectrum analyzers signal generators VNAs oscilloscopes and protocol analyzers to validate RF and system performance Define test plans and acceptance criteria for system-level performance and work closely with test engineers to implement automated measurement flows in the lab Partner with RF analog digital and firmware teams to resolve cross-domain issues discovered in simulation or lab — own the path from root cause to silicon fix Drive system-level compliance verification against 3GPP 5G NR and O-RAN Alliance specifications and represent GreenWave in standards and alliance working group discussions where applicable Produce clear architecture documents design review materials and technical trade-off memos that inform product and executive decisions Assist in mentoring junior systems engineers establish best practices for system modeling specification and lab methodology What You Bring 8+ years of hands-on experience in wireless systems development (LTE 5G NR) PhD in Electrical Engineering required Proficient in signal processing analysis/modeling skills with Matlab Python or C/C++ Strong understanding of communication theory & signal processing related algorithms design (such as timing recovery signal estimation and detection MIMO signal estimation and detection automatic gain control channel estimation equalization coding theory beamforming etc.) Familiar in 5G NR system architecture — PHY layer numerology beamforming and massive MIMO (mMIMO) antenna system design Experience with O-RAN architecture functional split options O-RU/O-DU/O-CU definitions fronthaul (eCPRI/CPRI) specifications and O-RAN Alliance WG4/WG7 compliance Proven lab experience — comfortable operating and interpreting data from spectrum analyzers signal generators VNAs oscilloscopes and RF test equipment in a prototype bring-up environment Hands-on experience with Cadence tools (Virtuoso Spectre or AWR Microwave Office) for schematic capture simulation or system-level modeling Experience authoring system-level specifications and architecture documents that drive IC design decisions Strong fundamentals in RF system analysis noise figure linearity (IIP3 P1dB) dynamic range phase noise spurious and link budget methodology Familiarity with 3GPP 5G NR standards testing and compliance methodology (TR 38.803 TS 38.104 etc.)

Nice to Have

Experience with MATLAB or Python for system-level simulation mMIMO beamforming modeling or automated test scripting Exposure to mixed-signal or RFIC design in advanced CMOS nodes (28nm 22nm 16nm FD-SOI or FinFET) Familiarity with O-RAN open-source platforms or test tools (e.g. OSC OpenAirInterface ORAN-SC) for integration and conformance testing Familiarity with AI-assisted test data analysis and ML-based signal/power integrity prediction tools to catch issues earlier in the design cycle Experience using Claude Code or similar AI coding assistants to accelerate design scripting simulation automation or documentation — familiarity with agentic AI tools for engineering workflows is a genuine differentiator Experience applying AI to technical documentation workflows — LLM-assisted datasheet parsing specification drafting or design review summarization General comfort adopting AI-augmented workflows to boost design productivity — this is a plus not a requirement for the right hands-on cellular systems expert

Compensation

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Benefits

At InnoPhase dba GreenWave Radios our total rewards package includes both a competitive base salary and pre-IPO stock options. The anticipated base salary range for this position is $180000 to $200000 annually. Actual compensation will be determined based on several factors including market conditions interview performance skills qualifications experience education and geographic location. In addition to base pay employees are eligible for a comprehensive benefits package. For detailed information on our benefits programs please visit our website.