Electrical Engineer II

About Ephemeris Net

We are extending the internet to space. Ephemeris Net is a pre‑seed space networking company on a mission to provide space connectivity for all through collaborative engineering of commercial space networking solutions. We are creating the infrastructure that will enable the space internet beyond bent pipe—starting with foundational networking infrastructure that will define how data moves through space.

Join our electrical engineering team to design and develop the electronics that make our vision of space networking a reality—from the high‑speed digital systems inside our Ephemeris Network Box to the opto‑electronics that run optical inter‑satellite link terminals. You'll contribute to three critical hardware domains: high‑speed digital networking electronics, optical terminal electronics, and semi‑custom optical transceivers. As part of the team, you will help establish how we approach electronics design for space networking systems and contribute to building Ephemeris Net's hardware engineering capabilities.

Your designs will define the hardware foundation for all Ephemeris Net products. This role reports to the CTO and co‑founder, Nicolas Brown.

The following are responsibilities across our electrical engineering team. You will own a subset of these based on your experience and interests, and contribute to others as needed.

• Design high‑speed digital systems with interfaces up to 9.6 Tbps for space‑based routing
• Implement optical interface protocols in space‑qualified hardware
• Ensure signal integrity and EMI/EMC compliance for high‑speed differential signaling
• Design power delivery systems for high‑performance networking processors and FPGAs
• Design storage subsystem electronics for a ~200 TB space‑based data cache, including high‑speed memory interfaces and storage controller integration

• Design and develop semi‑custom optical transceiver modules for space networking applications
• Work with optics and photonics vendors to integrate custom requirements into transceiver form factors
• Characterize and qualify transceiver performance for space environments

• Design motor control systems for precision pointing and tracking of optical terminals
• Develop photodiode transimpedance amplifiers for closed‑loop terminal pointing control
• Design laser driver circuits for closed‑loop terminal pointing control
• Implement closed‑loop control systems for beam steering and acquisition
• Optimize analog front‑end performance for low noise and high bandwidth

• Select commercial off‑the‑shelf (COTS) components appropriate for space environments
• Collaborate with the mechanical team on thermal management solutions for high‑power digital electronics in vacuum
• Support qualification test team in developing test procedures and qualification campaigns
• Work with fabrication partners to manufacture and assemble flight hardware
• Support hardware‑in‑the‑loop (HITL) testing and integration activities

• Define electrical interfaces between network box, optical terminals, and spacecraft bus
• Design electrical harnessing and cable routing for dynamic motion environments
• Collaborate with firmware team to ensure hardware‑software integration
• Support mission engineer in spacecraft‑level integration and testing
• Debug and troubleshoot hardware issues during build, integration, and test phases

• Bachelor's degree in Electrical Engineering or equivalent experience
• 3+ years of electronics design experience either with mixed focus on high‑speed digital or analog circuits or deep focus in one area
• Experience with PCB design tools (Altium, Cadence, or similar)
• Track record delivering hardware
• Understanding of signal integrity principles for high‑speed digital design
• Experience with laboratory test equipment (oscilloscopes, spectrum analyzers, network analyzers)
• Ability to obtain and maintain a US security clearance

• Experience designing space‑qualified or radiation‑tolerant electronics
• Familiarity with Xilinx Versal FPGA line
• Verilog or VHDL experience for FPGA…