Signal Processing Engineer – GNSS/PNT

About Logos Space

Logos Space is building a proliferated Low Earth Orbit (pLEO) constellation to deliver resilient, high-performance connectivity to enterprise and government users worldwide. As part of that effort, the Navigation team is designing and building the software and infrastructure for spacecraft timing, astrodynamics, maneuver planning, orbit determination, and related navigation workflows used across flight and ground systems.

Position Summary

We are hiring a Signal Processing Engineer to help design the navigation signals our satellites will transmit. You will turn signal and navigation-message concepts into working reference implementations, clear specifications, and tests that demonstrate the transmitted signal can be acquired, tracked, and decoded.

You will work across navigation signal design, message packaging, and verification, alongside specialists in navigation, timing, payload, RF, FPGA, flight software, and security.

At the Senior level, you will independently own defined signal-design, implementation, and verification workstreams. At the Lead level, you will own the technical direction and delivery of the signal-in-space effort, lead architectural trades and design reviews, and coordinate work across contributing teams.

Responsibilities

• Design and evaluate navigation signal structures, including PRN/spreading codes and assignment, data and pilot channels, modulation, and coding. Quantify trade-offs in acquisition, tracking, receiver complexity, and signal performance.

• Define navigation message content, framing, and broadcast schedules for ephemeris, clock, satellite health, and constellation information. Evaluate bandwidth, update cadence, data validity, and the time required for a receiver to obtain usable navigation data.

• Develop simulation tools and reference implementations that encode navigation messages and generate baseband/IQ signals. Use them to evaluate design choices and provide reproducible reference data for implementation teams.

• Develop and maintain the Signal-in-Space Interface Control Document (ICD), capturing signal definitions, message formats, field semantics, and relationships among code, symbol, message, and transmit timing.

• Work with navigation, timing, security, and payload implementation teams to define navigation-data and timing interfaces, signal configuration, operating modes, and authentication-related message requirements.

• Build conformance tests and golden-reference test vectors. Verify signal and message behavior with representative receiver processing, support software and hardware integration tests, and investigate discrepancies between the specification and implementation.