IoT Mixed Signal Design Engineer

Mixed Signal Design Engineer Mid-level (L4 equivalent) 2-5 years

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The job description

Tech stack. Cadence Virtuoso, Spectre, Verilog-AMS, MATLAB, ultra-low-power PDKs, BLE/Zigbee RF basics, energy harvesting interfaces

About the role

You will design the mixed-signal subsystems at an IoT chip startup whose products must run for years on tiny batteries or harvested energy. The team builds the sensor interfaces, radios, power management, and wake-up circuits that make a complete IoT node on one die. This role matters because every microamp you save extends deployment life, and in IoT, deployment life is the business model. You will work with firmware and systems engineers on the full node energy budget, since the lowest-power circuit still fails if the system wakes it up too often.

What you will achieve

Ship IoT mixed-signal blocks (sensor ADCs, always-on wake-up receivers, nanoamp references, or power management) that hit aggressive power targets: sub-microamp sleep and microwatt active budgets.
Drive system energy by co-designing with firmware and digital teams: event-driven architectures and duty cycling that cut average power by 30% or more versus always-on alternatives.
Reduce time to market for new sensor products by building a reusable library of characterized low-power analog blocks (amplifiers, ADCs, references) that product teams can drop into new chips.
Own the radio-adjacent analog: crystal oscillators, PLLs, and baseband filters for BLE or sub-GHz radios, meeting phase noise and power specs for reliable wireless links.
Cut field power surprises by modeling the full energy budget (active, sleep, transitions, radio events) and validating it against measured silicon within 10% before product launch.

What you will bring

Must-haves

2-5 years designing ultra-low-power analog/mixed-signal circuits with tapeout and measured power results.
Subthreshold design fluency: gm/Id methodology, weak-inversion tradeoffs, and the noise and speed penalties of nanoamp design.
Experience with sensor interfaces: bridge amplifiers, capacitive sensing, temperature sensors, or low-rate ADCs for sensor readout.
Understanding of IoT system power: duty cycling, power gating, wake-up latency, and energy budgeting across a full application cycle.
Familiarity with wireless radio analog: crystal oscillators, PLL basics, and baseband filtering for BLE, Zigbee, or sub-GHz.
Lab skills for low-power measurement: sub-microamp current measurement and long-duration power profiling.

Nice-to-haves

Experience with energy harvesting (solar, thermal, vibration) interfaces and maximum power point tracking.
Knowledge of security-adjacent analog: PUFs, TRNGs, or tamper sensing.
Familiarity with cost-optimized packaging and its analog implications.