Principal Embedded Software Engineer

Principal Embedded Engineer | Long Island, NY (On-site) PermanentNot sure what skills you will need for this opportunity Simply read the full description below to get a complete picture of candidate requirements.X4 Technology is hiring a Principal Embedded Engineer for an on-site role based in Brentwood, NY (Suffolk County / Long Island).Our client is a well-established, growing engineering organization building next-generation hardware products, backed by a stable, well-resourced engineering function and a strong pipeline of ongoing product development. They offer a genuinely flexible working pattern (9/80 schedule - every other Friday off) and a collaborative, hands-on engineering culture where you'll have real technical ownership and influence over architecture decisions.Open to C2C, W2, or permanent applicants - engagement type is flexible depending on what works best for you.This is a Principal-level position - we're looking for a senior technical leader, not just a strong individual contributor.Interviewing now, with the ability to start from September.This is a hands-on principal engineering role spanning embedded software, bare-metal firmware, wireless systems, and hardware-adjacent electrical work. You'll be the technical authority in the room, setting direction on system architecture while still writing code and getting into the detail with the hardware.What you'll be doing:Owning architecture and technical direction for embedded and bare-metal firmware across current and next-generation product linesWriting and reviewing low-level C/C++ firmware directly on microcontrollers, with no OS or RTOS abstraction where requiredLeading development and integration of wireless communication protocols (e.g. BLE, Wi-Fi, cellular, LoRa, or similar) into embedded productsWorking closely with electrical/hardware engineering on schematic review, board bring-up, pin mapping, and system-level debuggingMentoring and technically guiding other engineers on the team, and acting as a escalation point for the hardest technical problemsDriving decisions on processor selection, power budgets, and system architecture trade-offsWhat we're looking for:Deep, hands-on embedded and bare-metal firmware experience - genuine low-level development, not just configuration or integration workReal experience with wireless technologies (any of BLE, Wi-Fi, cellular, LoRa, GPS, or similar) at the firmware/protocol levelStrong electrical engineering knowledge - comfortable reading schematics, working through hardware bring-up, and collaborating directly with EE teamsPCB-level knowledge - able to read and work from PCB layouts, understand board-level design constraints, and troubleshoot issues down to the component/trace levelStrong C/C++ fundamentals and a track record of taking embedded products from architecture through to productionPrior experience operating at a Principal / senior technical leadership level, mentoring engineers and owning architecture decisionsEmbedded Linux exposure is a plus but not required - this role is centered on bare-metal and wireless systems workLocation: This is an on-site role in Brentwood, NY, with a 9/80 working pattern. Candidates must be local to, or willing to relocate to, the Long Island / Suffolk County area - this is not a remote position. But the client are paying toward $200k per year.Interested? xhyhwjd Apply directly or send a message with your resume.