Director of Engineering (RFIC Focus)

Oso Semiconductor • Mountain View, CA

9d • Hybrid

About The Position

Oso 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. The Role We are hiring a Director of Engineering to lead our engineering organization through its next phase of growth. This is a hands-on technical leadership role: you will help set the architectural direction for our mmWave RFIC platform while personally contributing to circuit design. You will build, scale, and manage the engineering team as we grow. The right person is a senior RFIC leader who has built teams before, takes initiative, and wants the accountability of owning engineering outcomes end to end. We need an engineering leader who is capable of circuit design and building a team. This role does both.

Requirements

• 10+ years of experience in RFIC/mmWave design, system architecture, and product development (minimum 5+ years professional/industry experience).
• Proven track record building and scaling engineering teams, ideally in a startup or high-growth environment.
• Expert proficiency with Cadence EDA suite (Virtuoso, Spectre, and ADE), EM simulation tools (Ansys HFSS, Momentum, or EMX), and RF test methodologies.
• Deep expertise in mmWave front-end circuits: PAs, LNAs, phase shifters, VGAs, and passive structures.
• Strong understanding of phased array systems and RF signal chains.
• Experience with tapeouts, chip packaging, testing, DFM, and reliability.
• Track record delivering RFIC products from design through production.
• Excellent communication and cross-functional leadership skills.

Nice To Haves

• Experience bringing beamforming RFICs from concept to volume production.
• Experience in SATCOM, 5G, or radar markets.
• Experience working with foundries and managing semiconductor supply chains.
• Strong transmit circuit design background, particularly high-frequency PA techniques.
• Advanced degree (MS/PhD) in Electrical Engineering.
• Strategic mindset: engineering decisions framed in terms of business outcomes and competitive positioning.

Responsibilities

• Own the engineering organization. Guide technical strategy, define team structure, and establish processes that scale.
• Design, simulate, layout, and integrate front-end circuits (LNAs, PAs, phase shifters, VGAs). You will be designing alongside your team, not just managing.
• Help to define and drive the architectural direction of our mmWave beamforming chips and phased array systems.
• Oversee the full chip lifecycle: design, verification, testing, and managing fabrication and OSAT relationships; from prototyping through mass production.
• Recruit, manage, and mentor RFIC, system, and mixed-signal engineers. Build a culture of technical excellence.
• Work directly with the CEO/CTO, BD, and customers to align engineering execution with market opportunities.
• Help develop novel architectures and build the company’s patent portfolio.
• Drive best practices in design methodology, simulation, testing, and manufacturability.

Benefits

• Stock option grant with 4-year vesting and 1-year cliff.
• Comprehensive health coverage with employer-sponsored medical, dental, and vision plans.
• Unlimited PTO.
• Employer-matched retirement plan.
• Equal parental leave for all parents.
• Regular team lunches, events, and celebrations.
• Company-paid life insurance.
• Flexible spending and health savings account options available.
• Pre-tax transit and parking benefits.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior