John Sheehan
Freelance Software Engineer at JennaSys
Hemet, California, United States
Summary
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RockstarJohn Sheehan is a freelance software engineer with 11 years of experience blending software and systems development with deep roots in manufacturing and business operations. He builds end-to-end solutions spanning embedded systems, IoT, database and data engineering, and system integration while also managing project, finance, and training responsibilities. Comfortable across industries from healthcare to retail, he excels at translating complex manufacturing processes into practical, auditable software and data migrations. Known for "knowing a little bit about a lot," he often connects hardware, firmware, and enterprise tooling to solve cross-disciplinary problems. Based in Hemet, California, he brings a pragmatic, hands-on approach that prioritizes reliable delivery and clear technical documentation.
11 years of coding experience
English
Stackoverflow
436reputation
29kreached
15answers
0questions
Github Skills (70)
thonny10
pyngrok10
python-ide10
css10
transcrypt10
plugin10
javascript9
build-configuration9
browser9
parcel9
html9
python9
localtunnel9
ide9
commonjs9
Programming languages (4)
Github contributions (5)
JennaSys/esp8266
Jun 2018 - May 2020
Contributions:4 commits, 28 pushes, 1 branch in 1 year 10 months
JennaSys/micropython-max7219
May 2019 - Aug 2022
MicroPython driver for MAX7219 7-segment modules
Contributions:1 release, 11 commits, 1 PR in 3 years 3 months
max72197-segmentsegmentmicropythonmicropython-driver
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