Senior Electrical Engineer I

In-Person

Role Overview

OXOS builds radiographic imaging devices that give providers the capability and confidence to make accurate decisions at the point of need. As we scale, we're hiring a Senior Electrical Engineer to own the design of the PCBAs at the heart of our next-generation systems, the boards that carry our high-speed detector and emitter electronics.

This is a hands-on senior IC role. You'll design boards end-to-end: architecture, schematic capture, component selection, layout, working with fab vendors, and hands-on bring-up and test in the lab. You're the person who simulates a power stage before committing to a five-figure board spin, who length-matches the high-speed signals so the board passes EMC the first time, and who helps the rest of the team get better.

If you've personally designed and brought up complex multilayer boards in a regulated industry, and you simulate your circuits instead of hoping they work, we should talk.

What This Person Will Do

• Own Boards end-to-end. Take PCBAs from architecture through production. You decide how features and functions get split across boards, capture the schematic, select components, do the layout, work with vendors to fabricate, then bring the board up yourself on the bench. At OXOS the engineer who designs the board also tests it. You write the test plan, the board comes in, and you run it.
• Simulate before you build. Our boards are expensive and the layer counts are high (12 today, 14 to 16 on the detector roadmap). A single detector-board mistake can cost five figures. You'll use LTspice and similar tools to check signal integrity and power integrity up front, so we find problems in simulation instead of on the bench.
• Design for compliance. OXOS devices meet IEC 60601-1 (basic safety, single-fault-safe) and IEC 60601-1-2 (EMC). You'll design boards that pass radiated and conducted emissions and immunity, handle high-speed digital and RF behavior, and keep power stages efficient enough that we're not fighting heat inside the enclosure.
• Work across the team. You'll work with Mechanical on board shapes, hold-downs, and harnesses, with our FPGA engineer on the boards his detector lives on, and with the software and firmware team (ST microcontrollers) during bring-up. You'll also write the electrical requirements for outsourced subsystems like the battery pack and BMS.
• Raise the team's bar. Contribute real feedback in team design reviews, audit your own and others' work, and bring the simulation skill the team is trying to build, including teaching it.

What We Are Looking For

Required:

• 5 to 7 years designing PCBAs in a regulated industry (medical preferred; automotive or any other regulated industry works too).
• Significant hands-on board-design experience: schematic capture, component selection, layout, DFM and DFT, and working with vendors to fabricate boards, including complex multilayer boards.
• Strong signal-integrity and power-integrity simulation experience (LTspice or equivalent).
• Working knowledge of IEC 60601-1, or equivalent depth in another regulated-industry safety standard.
• EMC design experience (radiated and conducted emissions and immunity), ideally including having run the testing yourself.
• Hands-on lab skills: oscilloscopes, function generators, power supplies, electronic loads, and soldering and rework down to 0201.
• Microcontroller experience (ST family preferred).
• Comfortable owning both the design and the test and bring-up of your boards.

Preferred:

• Altium Designer experience (we'll teach it if you've used a comparable tool).
• RF and power-electronics experience.
• ST microcontroller firmware experience.
• Battery pack and BMS requirements experience (UN 38.3, IEC 62133).
• Experience using AI tools to automate engineering work.

About Working Here

OXOS is a small, lean team, and this role is hands-on and high-ownership. EE engineers here own both the design and the test of their boards. There's no separate test team handing you a defect list. The people who do well are persistent and resourceful. They don't drop a problem because it's hard or ambiguous, they find a way forward, and they hold themselves to a high standard without being asked.