Senior Wireless Systems Engineer, R&D

Hubble Network•Seattle, WA

4d•Onsite

About The Position

Hubble Network is building a global Bluetooth® network for machine-to-machine connectivity, aiming to be the first billion-endpoint-connected network. This role is for a Senior Wireless Systems Engineer on the R&D team, focusing on improving the accuracy of the core satellite location system and researching future technologies. Approximately 75% of the time will be dedicated to enhancing the accuracy of the satellite-based location solution by refining algorithms, modeling error sources, and closing the gap between theoretical and achieved positioning performance. The remaining 25% will be for forward-looking research, specifically investigating a downlink beacon for time and position estimation. The engineer will collaborate with hardware, software, and space systems teams to transition research into production technologies, working within the ambiguity of pushing beyond established standards. This is a full-time position based in Seattle, WA.

Requirements

Bachelor's degree in Electrical Engineering, Computer Engineering, or related field; Master's or PhD highly preferred
Deep grounding in communication theory and signal processing (channel estimation, equalization, timing/frequency recovery, coding/error correction)
Experience with geolocation/positioning algorithms (TDOA, FDOA, multilateration, or similar) is a strong plus
Strong knowledge of wireless communications fundamentals (FSK, OFDM, MIMO, spread spectrum, etc.)
Familiarity with existing protocols (5G/LTE, 802.11 variants, Bluetooth/BLE) as reference points
Proficiency in MATLAB and/or Python and/or C/C++ for modeling, simulation, and algorithm prototyping
Comfort taking research to hands-on validation: lab bring-up, RF test equipment (spectrum analyzer, signal generator, oscilloscope, logic analyzer), FPGA/SoC prototyping
Ability to work independently across both incremental optimization work and open-ended exploratory research
Strong written and verbal communication skills
Comfort in a fast-paced, early-stage environment, including availability for extended hours around critical milestones
U.S. citizens or lawful permanent residents (“green card holders”) as defined by ITAR (22 CFR §120.15)

Nice To Haves

10+ years of directly relevant experience, ideally including satellite or GNSS-adjacent positioning/timing work
Experience with LEO satellite links, Doppler compensation, or extreme link-budget-constrained systems
Background in time-of-arrival/frequency-of-arrival estimation or precision timing systems
Experience with multi-radio coexistence and modem/microprocessor architecture
Prior experience in an R&D or advanced-technology group

Responsibilities

Improve the accuracy and reliability of location estimation algorithms for BLE-to-satellite links — timing recovery, Doppler/frequency estimation, multilateration, and error correction
Characterize and model dominant error sources (satellite ephemeris, oscillator drift, propagation effects, multipath, receiver noise) and prioritize which to attack first
Build and refine link and geolocation models to validate improvements before they hit hardware or flight software
Design experiments — simulation, emulation, and over-the-air — to measure real-world positioning accuracy against theoretical bounds
Work with flight software and ground infrastructure teams to translate algorithm improvements into deployed accuracy gains
Research and prototype algorithms for a satellite downlink beacon that terrestrial devices could use to independently estimate time and position
Model link budgets, signal design trade-offs, and expected accuracy for a downlink-based approach versus today's uplink architecture
Run early feasibility studies and go/no-go experiments to determine whether and how a downlink beacon could be integrated into the network
Document findings and present them in design reviews to inform whether this becomes a funded roadmap item