Kostas Vaggelakos

Senior Machine Learning Engineer @ Roku
12+ Years of experience in Software Engineering & ML
United States of America 5.0 (3 reviews) Active 7 months ago


$290 / month

The most popular way to get mentored, let's work towards your goals!

4 calls per month

Unlimited Q&A via chat

Expect responses in 24 hours or less

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I'm your friendly social tech enthusiast. I've been programming for over 16 years and I've done machine learning for 5+ years. I've started my own startup as well as worked for large companies. I've specialized in the NLP space, but I have plenty of projects in Computer vision and other fields.

I'm excited to share my knowledge with you and help you navigate the machine learning field. I know what companies are looking for and what they will require of you, and I can help you get there.

Enough bragging about me, I promise to keep it humble and respect whatever level your on. Honesty is key to every relationship.

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What mentees say



5 out of 5 stars

Standard Plan · 
16 months

Kostas is an amazing mentor! He helped me transition my career from Data Science to ML Engineering in 5 months. I am extremely grateful to have met him and learn from him :)

Shekhar wrote 2 more reviews for the same mentorship


5 out of 5 stars

Kostas is a great mentor. He helped me bridge the gap between being a Senior Data Scientist with no real world deployment experience to becoming a full time Machine Learning Engineer in Speech and Language Domain at work, the field I really wanted to work in. Before meeting him, I was solving problems on Leetcode and taking different courses online to learn about ML Engineering, however, those courses made seem packaging and deploying machine learning models a very tedious task and also lacked depth as nothing related to scaling or automating was every touched upon. Plus the problems discussed in these courses were very basic. After I met Kostas, I not only worked on a seemingly complex real world problem, but also learned how to actually package models and deploy them at scale to handle high volume of inference requests. The same learning reflected in my interviews and heavily complemented my leetcode problem skills and I was able to make the jump to my desired role. I cannot thank him enough for that :)



5 out of 5 stars

Kostas is a great mentor! He systematically breaks down the learning cycle into smaller chunks for the mentee to completely understand the overall picture. I am really grateful for his time and help in my learning journey.

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