Principal GNSS Systems Eng, Amazon LEO

We are seeking an exceptionally skilled Senior GNSS Systems Engineer with a minimum of 10 years ofhands-on experience in GNSS engineering, satellite systems, and advanced positioning, navigation, andtiming (PNT) technologies. This is a senior-level technical leadership role requiring deep, first-principlesexpertise across the full GNSS signal chain — from satellite constellation physics and signal generation through receiver design, carrier phase tracking, and precision position and time solutions delivered toground terminals.

The successful candidate will lead the design and delivery of a custom satellite-based wirelesspositioning and timing transfer service operating across S-Band and L-Band frequencies. This system willtransmit simultaneous multi-source signals that ground terminals can receive, correlate, and process toextract carrier phase differentials, enabling high-accuracy ranging, time delta computation, and precisegeolocation. The role demands mastery of both the theoretical underpinnings of GNSS — includingrelativistic time corrections, ionospheric and tropospheric propagation modeling, and CDMA spreadingcode correlation — and the practical engineering required to implement real-world satellitecommunication subsystems.

This position sits at the intersection of satellite communications engineering, precision time and frequency, and advanced signal processing. The engineer will own the GNSS subsystem architectureend-to-end, contribute to the TT&C subsystem, and serve as the technical authority on all matters related to satellite-based PNT service design, clock disciplining, and time transfer over wireless andoptical physical mediums.

Key job responsibilities

The Senior GNSS Systems Engineer will serve as the technical lead and subsystem owner for thespacecraft GNSS architecture, driving all aspects of design from initial requirements definition throughhardware acceptance

Basic qualifications Education
• Master's degree (or higher) in Electrical Engineering, Aerospace Engineering, Physics, or a closely related technical field. A Bachelor's degree may be considered with exceptional demonstrated experience.

Experience
• Minimum 10 years of professional engineering experience in GNSS systems engineering, RF systems engineering, satellite payloads, TT&C design, or precision PNT system development.
• Demonstrated hands-on experience with at least two of the major GNSS constellations (GPS,GLONASS, Galileo) at the signal and systems engineering level — not limited to receiver integration.
• Proven experience designing or significantly contributing to precision time transfer systems, includingtwo-way time transfer (satellite or optical medium), with documented accuracy results at thenanosecond level or better.
• Demonstrated experience implementing Kalman filter-based navigation or timing solutions in real-world systems, with measurable performance results.
• Experience with RF systems engineering across S-Band and/or L-Band frequencies, including linkbudget derivation, antenna specifications, and receiver performance analysis.
• Proven track record managing RF hardware development cycles with external suppliers and definingstrict test and qualification parameters for flight hardware.

Preferred qualification Experience designing a custom satellite-based PNT service from initial concept through operationaldeployment — including waveform design, ground terminal specification, and algorithm development.
• Practical experience with optical time transfer systems (White Rabbit, TWFTF) and integration ofoptical and RF time references in hybrid synchronization networks.
• Expertise in Alternative PNT (Alt-PNT) system design and evaluation, including non-GNSS positioningtechnologies and GNSS-independent timing…