$ independent AI / ML contractor
I'm Vadim von Brzeski, a data scientist and AI leader with 20+ years in machine learning. I help companies apply AI, ML and modeling where it makes a difference, either by owning a project end to end or by joining your team as a senior, hands-on contributor.
Previously: Director of Marketing Data Science, eBay · Yahoo! Search & Yahoo Labs
// work with me
You have a business problem and suspect AI or ML can help. I'll scope it, build the solution, and hand it off in a form your team can run.
You already have a team and need more senior AI/ML capacity. I plug in as a contractor, work in your stack and process, and start contributing quickly.
You need senior data science leadership but not a full-time director. I step in part-time to set direction and help your team deliver.
// about
Most recently I was Director of Marketing Data Science at eBay Core AI, where I led scientists and engineers applying AI to e-commerce and marketing. Before that, I was an applied researcher at Yahoo! building machine-learned systems for search and advertising. And before that, I was the CTO/Founder of a dot-com era startup developing cloud-computing solutions.
I've been building models since long before "AI" was a buzzword. That long view helps me separate what will actually work for your business from what just demos well.
LogLambda Consulting LLC is my independent practice. When you work with LogLambda, you work directly with me. No account managers and no junior staff.
See my background on LinkedIn →I start with what you're trying to achieve, not the model. If AI isn't the right answer, I'll tell you.
I validate ideas on your real data before you commit to a bigger build.
Results are tied to metrics you care about, so you can see whether it's working.
I work the way your team works and leave clean code, clear docs and no dependency on me.
// experience
A sample of production ML/AI projects from my time at eBay and Yahoo!.
eBay · GenAI
Fine-tuned open-source and proprietary LLMs to generate personalized marketing copy for campaigns.
eBay · GenAI
Fine-tuned LLMs to rewrite item listing titles and descriptions on ebay.com to drive buyer engagement.
eBay · GenAI
Developed LLM-based solutions to detect users' shopping intent at scale.
eBay
Optimized the frequency and channel (email vs. push) of marketing communications to lift engagement without increasing unsubscribes.
eBay
Inferred shoppers' purchase propensity from their activity to drive promotional marketing emails and product recommendations.
eBay
Predicted which inactive users were likely to come back, so marketing could target re-engagement where it would pay off.
eBay
Estimated the causal effect of new app releases on user behavior, using large-scale longitudinal modeling of user activity.
Yahoo! Search
Science and technical lead on a platform that detected key phrases and named entities in news, mail, finance and sports content, with ML ranking, summarization and word-sense disambiguation.
Yahoo Labs
P(click) models for sponsored search ads, including large-scale data exploration, feature engineering and model verification.
// contact
Or a team that could use another experienced hand? Send me a short note about what you're working on and I'll get back to you.
