Konstantinos Vaggelakos
Staff Machine Learning Engineer at Apple
Boston, Massachusetts, United States
Summary
👤
Senior🎓
Top SchoolKonstantinos Vaggelakos is a Staff Machine Learning Engineer with 11 years of experience building and shipping large-scale language and voice systems, currently leading Siri’s integration with ChatGPT and Apple Intelligence. He combines deep research instincts with hands-on engineering, having designed on-device LLM training, evaluation, and an on-device MLOps stack that powered shipped Apple Intelligence features. Previously he led ML architecture and NLU at Roku and co-founded BeyondWords, where he invented an NLP-driven SSML system to markedly improve TTS quality. Konstantinos is skilled at bridging modeling, infrastructure, and product teams to make AI practical, efficient, and deployable under real-world constraints. Based in Boston, he pairs a KTH computer science background with a founder’s pragmatic approach to scaling systems and teams. An under-the-radar strength is his track record of delivering the single Apple Intelligence Siri features that reached users, not just prototypes.
11 years of coding experience
11 years of employment as a software developer
Master's degree, Computer Science, Master's degree, Computer Science at KTH Royal Institute of Technologyhigh school, Computers, Math, high school, Computers, Math at Rudbeck
Swedish, English, Greek
Stackoverflow
26reputation
133reached
1answer
0questions
Github Skills (157)
yolov510
object-detection10
mp310
onnx9
geojson9
parser9
deep-learning9
tflite9
docker-image9
coreml9
ios9
pytorch9
geospatial9
machine-learning9
docker9
Programming languages (8)
Github contributions (5)
kvaggelakos/serverless-ffmpeg
Dec 2017 - Feb 2018
Contributions:22 commits, 15 pushes, 1 branch in 1 month
kozze89/badpunsintended.com
Sep 2015 - Nov 2015
Contributions:67 pushes, 1 branch in 2 months
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