Nicolas Contreras Email & Phone Number

Valencia, Valencian Community, Spain

Neuilly-Sur-Seine, Île-De-France, France

Led a team of up to four developers in:- building and improving features for data-driven ad campaign measurement applications, deployed in over 10 countries- benchmarking the best tech stacks for our use cases- implementing a microservice architecture and improving our orchestration- consolidating our applications into multi-language monoreposDeveloped several in-house frameworks related to machine learning and geodata indexing.Provided cross-teams trainings on Spark job optimization and SOLID OOP in Python.Contributed to the development of cross-teams guidelines regarding project structures and tests integration into CI/CD pipelines.Tech stack: Python, Scala, SQL, Spark, DBT, Airflow, AWS

Neuilly-Sur-Seine, Île-De-France, France

Optimized Scala/Spark jobs to cut run time by over 30% and significantly reduce out-of-memory and null pointer exceptions.Benchmarked methodologies from the econometric literature to estimate the incremental impact of ad campaigns on various business objectives (sales, store visits, brand recognition, etc.). Implemented the resulting methodology in in-house solutions and disseminated it across stakeholders.Refactored and maintained a dashboard tracking the recovery of out-of-home mobility following the end of the COVID lockdowns in various countries, using third-party geolocalised mobile data.Tech stack: Python, Scala, Spark, Airflow, AWS

Paris, Île-De-France, France

Lectures: data processing with NumPy and Pandas, dataviz with Matplotlib and Seaborn, JSON data encoding / decoding, API requesting and web scraping in Python.

Paris, Île-De-France, France

Assessed HR policies in French companies belonging to the banking / financial sector :- developed and visualised client-relevant KPIs- presented conclusions to employee representatives and ExCo membersSpearheaded the development of automated data processing tools in Python: needs analysis, UI/UX design, development, testing and user support.Stack: Pandas, NumPy, TkInter

London, England, United Kingdom

Teamed with fellow participants in the S2DS programme to set up a pipeline for processing clickstream data from AWS and develop a dashboard as well as machine learning algorithms meant to predict return visits to Clicksco's clients' websites.Stack: Boto3, Pandas, NumPy, Bokeh, Scikit-learn

Paris, Île-De-France, France

Empirical research in education economics:- processing and merging of time series and geolocalised data- estimation of unbiased causal coefficients using econometrics (fixed effects and 2SLS)Taught undergraduate microeconomics (144 hours), including constrained optimisation, consumer and producer theory, and risk and uncertainty theory.Thesis not defended.

Brussels, Brussels Region, Belgium

Co-authored a report on active ageing in Belgium as part of MoPAct (Mobilising the Potential ofActive Ageing in Europe), a European research project, based on survey data, focus groups and stakeholders interviews, and a review of the literature.

Master'S Degree, International Economics

English-speaking, research-oriented graduate program in empirical economics with a focus in development and international trade economics.

Bootcamp, Full Stack Data Science

10-week full-time & intensive training in full stack data science. The curriculum covers Python programming, data collection, data.

Master'S Degree, Siences Po

Multidisciplinary curriculum in social sciences and business administration.

Hokkaido University Student Exchange Program (Hustep), Exchange Student

International student exchange program. English-taught curriculum in social sciences.