Sem Onyalo
Principal at Slalom Build
Old Toronto, Ontario, Canada
Summary
👤
Senior🎓
Top SchoolSem Onyalo is a Principal software engineer with nearly a decade of hands-on experience building enterprise systems, specializing in graph databases (Neo4j, AWS Neptune) and applied ML (computer vision, NLP). He has a proven track record delivering high-impact solutions under tight deadlines—turning weeks-long analytics tasks into minutes for a large beverage processor and enabling organization-wide knowledge graph adoption at a global asset manager. Comfortable across languages and stacks from C/C# and Java to JavaScript and cloud platforms (AWS, Azure, GCP), he blends system architecture, TDD, and distributed-system design to stabilize and scale mission-critical applications. His work has preserved and grown millions in revenue for healthcare clients by redesigning failure-prone systems into resilient, regulated cloud services. Fueled by a lifelong curiosity (thanks to LEGOs and Star Trek), he pairs pragmatic engineering with continuous learning and mentorship. Based in Old Toronto, he brings both deep technical fluency and the rare ability to translate complex graph-and-ML solutions into production-ready business value.
9 years of coding experience
8 years of employment as a software developer
Bachelor of Engineering (B.Eng.) Computer Systems Engineering, Bachelor of Engineering (B.Eng.) Computer Systems Engineering at Carleton University
Github Skills (28)
annotations7
azure6
api6
imagenet6
deep-learning5
audio5
image-classification5
microsoft5
labeling4
coco4
computer-vision4
image-annotation-tool3
time-series3
microsoft-azure3
java2
Programming languages (4)
Github contributions (5)
sem-onyalo/video-object-detection
Apr 2018 - Jan 2021
Contributions:5 commits, 8 pushes, 1 branch in 2 years 9 months
sem-onyalo/speed-reflex-game
Oct 2018 - Apr 2019
Contributions:62 commits, 33 pushes, 3 branches in 6 months
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