Jonathan Cefalu
Senior Software Engineer at Onto Innovation
United States
Summary
👤
Senior🎓
Top SchoolJonathan Cefalu is a Senior Software Engineer with over a decade of experience building full-stack solutions, specializing in .NET (C#) and Python for industrial and embedded systems. He combines hands-on development of control and automation software with practical electromechanical expertise, having reverse-engineered legacy systems, recovered critical data paths, and integrated hardware like RFID scanners and vision systems. Jonathan has led teams and delivered product-grade control platforms, CI/CD pipelines, and cloud integrations while serving as a bridge between software, mechanical, and customer stakeholders. Comfortable across the stack, he’s built data pipelines and analytical tooling using NumPy, OpenCV, SQLite and GCP, and accelerated development with AI tooling and Dev Containers. Known for pragmatic problem solving, he often uncovers non-obvious fixes (including finding hidden access points in legacy databases) that restore functionality and reduce downtime. Based in the United States, he mentors peers and drives technical vision in fast-moving, cross-disciplinary environments.
11 years of coding experience
14 years of employment as a software developer
Bachelor of Science in Electromechanical Engineering Electrical and Mechanical, Bachelor of Science in Electromechanical Engineering Electrical and Mechanical at Wentworth Institute of TechnologyDrafting Drafting, Drafting Drafting at Assabet Valley Vocational High School
Github Skills (14)
firmware10
arduino10
boxee9
3d-printer9
esp329
3d-printing9
avr8
32-bit8
microcontroller8
atmel7
telnet4
lcd2
file-transfer1
upload-file1
Programming languages (2)
Github contributions (5)
Jbchow/Marlin-Ender-5-Plus
Mar 2020 - Jun 2020
jbchow Ender 5 Plus - Optimized firmware for RepRap 3D printers based on the Arduino platform.
Contributions:49 commits, 7 pushes, 1 branch in 2 months
3d-printerarduinofirmware
andocromn/NoBulldozeMod
Oct 2022 - Oct 2022
Contributions:3 pushes in 1 day
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