Da Estévez
Contractor Consultant at Freelance
Tres Cantos, Community of Madrid, Spain
Summary
🤩
Rockstar🎓
Top SchoolDa Estévez is a contractor consultant and GNSS/DSP specialist with a PhD in Operator Theory and dual BSc degrees in Mathematics and Computer Science, blending deep mathematical rigor with practical engineering. With a decade of experience, he designs and validates DSP algorithms for FPGA and embedded Linux, and consults on spacecraft communications while previously working as a GNSS engineer at GMV. An active GNU Radio contributor, he has improved core digital blocks and developed gr-satellites decoders used across many amateur and university cubesat projects. An amateur radio operator, he runs a technical blog documenting hands-on RF and satellite experiments and has collaborated with universities on cubesat systems—demonstrating a rare mix of theory, open-source impact, and field-tested RF implementation.
10 years of coding experience
4 years of employment as a software developer
BSc, Mathematics, 9.63 (scale 0-10), BSc, Mathematics, 9.63 (scale 0-10) at Universidad Autónoma de Madrid
Spanish, English
Github Skills (12)
c-language10
software-defined-radio10
cprogramming-language10
python10
gnuradio10
rad10
signal-processing9
digital-signal-processing9
algorithms8
data-structures8
algorithm8
data-structure8
Programming languages (13)
Github contributions (5)
daniestevez/gr-satellites
Aug 2016 - Jan 2023
GNU Radio decoder for Amateur satellites
Role in this project:
Back-end & System Engineer
Back-end & System EngineerContributions:80 releases, 125 reviews, 1566 commits in 6 years 5 months
Contributions summary:Da contributed to the development of the GNU Radio decoder for Amateur satellites, specifically by fixing bugs in telemetry parsing and adding support for different satellites. They implemented a fix for a FUNcube telemetry parser and integrated support for various satellites such as JY1-Sat, Suomi 100, PW-Sat2, ESEO, ITASAT 1, D-STAR One, Astrocast, and many others. The user also improved the functionality of the FSK and BPSK demodulators by incorporating a low-pass filter and implemented features such as the inclusion of timestamps in the output of KISS files.
fecrtlsdramateursatellitegarmin
gnuradio/gnuradio
Dec 2019 - May 2022
GNU Radio – the Free and Open Software Radio Ecosystem
Role in this project:Back-end Developer & QA Engineer
Back-end Developer & QA EngineerContributions:117 reviews, 20 commits, 24 PRs in 2 years 5 months
Contributions summary:Da primarily contributed to the GNU Radio project by addressing issues related to the digital domain. They enhanced the functionality and fixed bugs in the differential encoder/decoder blocks, adding a NRZI option and optimizing the modulus 2 implementation. Additionally, the user added generic CRC blocks with associated QA tests to the digital module. Further contributions included fixing a frame size bug in the async_decoder and implementing tests, alongside fixing tag propagation issues in the repeat block.
pythonwirelessc-plus-pluscybersecuritycommunications
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