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How Expedia Monitors 1000+ A/B Tests in Real Time with Flink and Kafka
A look inside the pipeline that spots underperforming experiments in minutes and not days
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Data Tinkerer
How Target Used GenAI to Lift Sales by 9% Across 100K+ Products
LLMs helped Target match the right add-ons, from throw pillows to phone cases -boosting engagement (+11%) and relevance (+12%) without blowing up…
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Data Tinkerer
3
The Alignment Trap: When Stakeholders Want Data but Not the Truth
How to survive loaded questions, confirmation bias and requests for “just a quick chart.”
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Data Tinkerer
5
How Bolt Reconciles €2B in Revenue Using Airflow, Spark and dbt
A look under the hood of a multi-country finance pipeline that ingests raw data, models discrepancies and reconciles cash flows at scale.
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Data Tinkerer

June 2025

How DoorDash Used LLMs to Trigger 30% More Relevant Results
What happens when you mix knowledge graphs, tight vocabularies and just enough AI? You get cleaner segments, smarter retrieval and a system that knows…
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Data Tinkerer
When the Ratio Lies: The Denominator Problem Explained
How misleading metrics creep in when you forget to ask “out of how many?”
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Data Tinkerer
Meta Buys Half of Scale AI, Apple Polishes Glass and Veo 3 Crashes the NBA Finals
Zuck drops $14.8B on ‘superintelligence’, Apple skips Siri upgrades and AI-generated ads hit primetime TV
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Data Tinkerer
How Flipkart Scaled Delivery Date Calculation 10x While Slashing Latency by 90%
Optimising for 100 items in 100ms without breaking the backend (or the bank)
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Data Tinkerer
ChatGPT Codex, Lawsuit Drama and A 52 Dollar Festival
OpenAI expands tools, lawsuits heat up, and a small town in Brazil wins the internet with a $52 Veo promo video.
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Data Tinkerer
How Uber Cut Invoice Handling Time by 70% with GenAI (Without Ditching Humans)
What started as a messy mix of bots and spreadsheets is now a smart, scalable pipeline powered by LLMs and human-in-the-loop design.
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Data Tinkerer
2
Veo's Viral Videos, Upgraded Agents and Dashboards in 10 Minutes
Google’s Veo stuns the internet, OpenAI upgrades its operator and Perplexity Labs mode goes full analyst.
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Data Tinkerer

May 2025

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