Senior Data & MarTech Engineer

Valentina

Tihova

— Statement

I build data systems that don't lie to the people who rely on them.

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Valencia, Spain · Remote · EU Auth

02

Work

Case studies with public GitHub repos and long-form write-ups from production work — no client data, just how things were built and measured.

LatestData Engineering
May 2026 · 11 min read

Data Cloud Documentation Should Not Be Written by Hand

Apex HTTP callouts against the Data Cloud REST API to extract stream inventory, field mappings, and DMO relationships into reproducible SI documentation.

MarTech
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02Machine Learning
Apr 2026 · 12 min read

Predicting Gold Recovery (Zyfra ML Model)

Gold recovery from multi-stage ore: same features in train and test, custom sMAPE, cuts on bad concentrations and feed size. Notebook on GitHub; charts here match the notebook EDA.

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03Machine Learning
Apr 2026 · 10 min read

Bank Churn Prediction & Retention Strategy

Churn on public tabular data: F1 with heavy class imbalance, no leakage in prep, and why a weighted random forest beat upsampling. Details in the GitHub notebook.

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04MarTech
Apr 2026 · 9 min read

When Open Rate Lies: Detecting Suspicious Opens in SFMC

SFMC Data Views to flag likely fake opens, cut noise in reports, and get a cleaner read on engagement.

Analytics
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05Data Visualization
Apr 2026 · 8 min read

How We Build a Day: Baby Feeding Clock Infographic

24-hour bottle feeds on one circular clock: volume and time in a single view.

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