RF Frequency Synthesis Architect
Tacit · San Francisco
- On site
- Fulltime
- San Francisco
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Subject: Interested in the RF Frequency Synthesis Architect role at Tacit
Hi Alex — I came across the RF Frequency Synthesis Architect opening and wanted to reach out directly. I've spent the last few years doing exactly this kind of work, and Tacit stood out because…
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About the role
About Tacit
We are an early-stage, deep tech startup based in San Francisco, developing innovative hardware that rethinks human-computer interaction. We are backed by General Catalyst, Khosla Ventures, and Greylock Partners, with a founding team from Stanford, BrainGate, Oculus, and Tesla. While we can’t reveal too much just yet, our team is tackling cutting-edge engineering challenges to bring revolutionary products to life.
About the role
We are seeking an RF Frequency Synthesis Architect to design and advance our next generation RF signal synthesis architectures. The ideal candidate has strong expertise in PLLs, synthesizers, oscillators, LO generation, phase-noise optimization, and low-power frequency-generation techniques, with experience spanning RFIC, package, module, and integrated RF hardware platforms.
What you'll do
Design and develop power efficient advanced RF frequency synthesis architectures.
Improve phase noise, jitter, spurs, harmonics, frequency stability, spectral purity, and power efficiency.
Evaluate and compare PLL, VCO, DCOs, oscillator, LC resonator and alternative frequency-generation approaches across power, phase noise, tuning agility, integration complexity, and scalability.
Conduct RF simulation, modeling, and system-level tradeoff analysis.
Support architecture selection, component evaluation, debugging, validation, and prototype integration.
Guide implementation across RFIC, package, laminate, module, and dense RF hardware integration environments.
Collaborate with RF, hardware, firmware, and systems teams to optimize RF performance.
Requirements
Master’s degree or PhD in Electrical Engineering, RF Engineering, Microwave Engineering, or related field.
5+ years of experience in RF frequency synthesis, or advanced RF system design.
Strong understanding of:
Frequency synthesis architectures
PLL and VCO design
Oscillator theory
RF/microwave fundamentals
Phase-noise and jitter optimization
Experience with RF design and simulation tools such as: ADS, Cadence, AWR, LTspice, CST or HFSS.
Experience with RFIC/IC design and SoC, package, module, or dense RF hardware integration.
Strong analytical, debugging, and system-level problem-solving skills.
Strong candidates may have
Experience with alternative frequency-generation techniques beyond conventional PLL-based synthesis, including injection-locked oscillators (ILO), digitally assisted synthesis, DDS-based approaches, Delay-Line oscillator, open loop, oscillator-based, ADPLL/DCO architectures, or hybrid frequency-generation techniques.
Experience with radar, sensing technologies, or mixed-signal systems.
Experience developing novel RF architectures or advanced low power wide band signal-generation techniques.
Publications, patents, or research contributions related to RF frequency synthesis or oscillator technologies.
Compensation Range
$150,000 - $200,000/year
Benefits
Competitive equity package
Comprehensive medical, dental, and vision insurance
Company size: 20-30 people
Unlimited PTO
Visa sponsorship
4% 401k matching