work experience | Alejandra

Here is a summary of projects i have done for previous jobs, grouped by subject

Natural Language Processing

Classification model of digital news for national newspaper company, through feature engineering evaluating grammar rules and styles of writing using part of speech tagging and regular expressions.
Creation of use cases tags applying regular expressions and context knowledge for digital whiteboard company, taking as input titles of canvas files.
Topic modeling, word clouds, lemmatization for several exploratory data analysis and visualization deliverables.

Model to assign probability of customer churn according to product usage.
Natural Language Processing and transfer learning to create a book genre classification system based on their titles and content description (written in spanish), for a company of book delivery.
User segmentation with behavioral variables and usage data extracted from open databases, experiments, observations and surveys to provide strategies to public transportation system company.

Creation of score to classify canvas usage according to product behavior into synchronous and asynchronous, for digital whiteboard company.
Analysis to find frontend and backend events related with low Frames Per Second (FPS) performance in product.
Analysis of Net Promoter Score (NPS) to find variables related with changes and to track feedback of users.
Analysis of features in beta and post-launch stages to provide insights related with user adoption.

Graphs for data exploration and visualization of results through Python packages like pyplot, seaborn and matplotlib.
Dashboards for stakeholders in Periscope Sisense and Tableau.

Data availability processes through Airflow (DAGs) and AWS (S3 for parquet storage, Glue crawlers).
Creation of automated reports in google sheets (BigQuery integration) and Microsoft Excel (macros in VBA).