[Remote] Staff Firmware Engineer, AI Native

Note: The job is a remote job and is open to candidates in USA. Life360 is hiring a Staff Firmware Engineer to build and own a reusable on-device machine-learning platform for its connected devices. The role spans embedded firmware, edge-model deployment and optimization, production debugging, and setting technical direction while collaborating across engineering and data teams. Responsibilities • Design and build the reusable on-device inference framework any Life360 device can adopt — the runtime, the model integration path, and the sampling and preprocessing pipeline — and make the platform-level calls (runtime and model format, memory/flash budgeting, OTA model updates) • Own it end to end: you architect it, implement it, and debug it when it misbehaves on a device in the field • Integrate inference into resource-constrained RTOS firmware (Zephyr / FreeRTOS) without compromising stability, scheduling, or power, and own the low-level plumbing — drivers, DMA data paths, SPI/I²C, and the middleware that feeds the pipeline • Debug on real hardware (oscilloscope, logic analyzer, JTAG) and drive cross-layer issues to root cause across the firmware/hardware boundary • Carry regular firmware work when ML demand is light — a full share of features, bug fixes, field issues, and on-call/triage • Get models running within firmware constraints — from Data Science or built and trained yourself, increasingly with AI-assisted tooling — handling quantization, operator support, and the latency/memory tradeoffs • Own the whole loop, from training output to validated on-device behavior. You don't take a model over the wall and hope • Squeeze inference into tight power, memory, and latency envelopes, and own the tradeoffs between model accuracy, power draw, and footprint — validated in the real world, not just on the bench • Drive alignment across firmware, app/cloud, data science, hardware, and ops on how on-device intelligence gets built here, and raise the team's embedded-ML fluency through code review, design docs, and pairing • Use AI tooling as a genuine development partner across firmware and ML, and help define what AI-native looks like for embedded work Skills • 10+ years of firmware engineering, taking complex consumer hardware from prototype through mass production, with a demonstrated track record of shipping at scale • Bachelor's degree in Electrical Engineering, Computer Science, or a related field • Deep C/C++ for embedded systems and real fluency in RTOS internals (Zephyr, FreeRTOS, or equivalent) • Strong low-level hardware skills — SPI/I²C/UART, DMA, interrupts, driver development from the datasheet up — plus hands-on debugging (scope, logic analyzer, JTAG) and power/memory discipline • Demonstrated experience deploying ML models on microcontroller-class hardware in a shipping product — not a course project or one-off PoC • Hands-on with embedded inference frameworks (TFLite Micro, CMSIS-NN, ExecuTorch, or equivalent) and model optimization (quantization, pruning); able to develop and train models yourself, not only deploy someone else's • Solid grounding in the sensor data and signal-processing pipelines that feed a model (IMU and similar) • You use AI coding tools (Claude Code or equivalent) as a genuine development partner and review their output as critically as any PR • Strong written communication and a habit of documenting decisions and working across firmware, hardware, and data science • Daily use — you use AI tools (Claude Code, Cursor, or equivalent) every day for real firmware and ML work: drafting and refactoring code, debugging on-device failures, writing specs and design docs, and building or validating models • Judgment and ownership — you review every line of AI-generated code and every AI-assisted model output as critically as you would a human PR before it ships to a device in the field. The AI writes it; you're accountable for it • Velocity — you're expected to use AI to compress timelines that used to take weeks, from specifications to working prototype to validated on-device behavior, and to be able to explain your approach when you don't • Team leadership — you share what you learn (patterns that work, guardrails you've added, failure modes you've hit) through code review, design docs, and pairing, and you help raise the team's AI fluency, not just your own • Continuous learning — you stay current on embedded-AI tooling and techniques and bring recommendations back to the team rather than waiting for them to arrive • Security and compliance for connected devices — secure boot, key provisioning, signed and rollback-safe OTA, and RF/regulatory certification (FCC/CE) • Hands-on experience with cellular, BLE, GPS/GNSS, or audio subsystems on battery-powered wearables or trackers • New-board bring-up — powering up unproven hardware, verifying power rails and peripherals, and getting first firmware running on a fresh board • Hardware schematic evaluation — reading and reviewing schematics, partnering with EE on design reviews, and catching issues before a board spin • Factory and manufacturing support — manufacturing test development, production-line bring-up and debug, and supporting yield and quality at the contract manufacturer Benefits • Restricted Stock Units (RSUs) • Medical, dental, vision, life and disability insurance plans (100% paid for US employees). • Life and disability as well as supplemental plans for medical and dental for Canadian employees. • 401(k) plan with company matching program in the US • RRSP with DPSP plan for Canadian employees • Paid parental leave • Mental Wellness Program & Employee Assistance Program (EAP) for mental well-being • Generous time off: flexible PTO, companywide holidays throughout the year plus summer and winter shutdowns • Learning & Development programs • Equipment, tools, and reimbursement support for a productive remote environment. • Free Life360 Platinum Membership Tile trackers • A remote work environment will be the primary experience for all employees. All positions, unless otherwise specified, can be performed remotely (within the US and Canada). Company Overview • Life360 creates a mobile app for families that helps families feel closer together. It was founded in 2008, and is headquartered in San Mateo, California, USA, with a workforce of 501-1000 employees. Its website is http://www.life360.com. Company H1B Sponsorship • Life360 has a track record of offering H1B sponsorships, with 12 in 2026, 15 in 2025, 22 in 2024, 17 in 2023, 21 in 2022, 17 in 2021, 7 in 2020. Please note that this does not guarantee sponsorship for this specific role.