2026
Life in the Slow Lane: Cost-Efficient Streaming Through Latency Tiering
Everyone loves real-time data until the cloud bill arrives. How splitting one fast pipeline into lanes made streaming cheaper.
40 min
On stage.
My two cents about topics that fascinate me, delivered live to real people around the world. Usually educational, sometimes entertaining.
2026
AI vs. Karen: Building Real-Time Sentiment Analysis Pipelines at Scale
How to spot the impossible customers before it's too late: real-time sentiment analysis with Kafka and Flink, and when an LLM or a small language model fits better.
50 min
Also given at AI Summit Europe 2025
2025
This Place is a Mess, Rewrite Everything!
You joined a new team, the legacy code makes no sense, and the urge to rewrite it all keeps getting louder. Should you?
15 min
Also given at Reversim Summit 2022 (lightning talk, in Hebrew)
2025
The Future of Data is Words
SQL has been the way we ask data questions for 50 years. LLMs now let anyone ask in plain words. Does SQL still matter? And what does the future of data look like?
50 min
Also given at hayaData 2024 (keynote, in Hebrew)
2024
When the CFO Comes Knocking: Our Journey to a Cost Efficient Data Platform
How we cut our cloud bill by more than 50% in under two years, and the habits that made it stick.
45 min
2024
From Chaos to Order: Transforming Analytical Data with Event-Driven Architecture
Data contracts, events and the lakehouse: how to get clean, owned, well-described data into your lake without chasing producers afterwards.
50 min
Also given at Build Stuff 2023 and Big Data Technology Warsaw Summit 2023
2023
Levels and Expectations: A Software Engineer's Career Journey
How do you get from junior to senior, and is management the only way up? A software engineer and an R&D manager compare notes.
50 min · with David Ostrovsky
2023
Tales of Data Architecture Evolution
The paths data architecture takes as a company grows, the growing pains along the way, and the mistakes that cost the most.
60 min
Also given at Build Stuff 2022
2021
A Brief History of Data
Five minutes on how we got from one big database server to data lakes and data meshes, and where it might go next.
Lightning talk · 5 min
For organizers.
If you find what I talk about interesting, don't be a stranger, reach out.
Speaker bio
The data and culture guy. Currently leading the Big Data Platform R&D at Wix. Josef has over 15 years of experience building data intensive SaaS applications and growing the awesome teams that make them. He believes that the secret sauce for creating sustainable complex systems is good design practices, effective communication between people, and automating everything. In his day to day he works tirelessly on building the culture necessary to support these values and propagate them to others, one pep-talk at a time.
Invite me to speak →- Speaks on Big Data · Infrastructure · AI in Production · Engineering Culture & Leadership
- Languages English · Hebrew
- Based in Tel Aviv / Israel