Javier Fernandez - Data Scientist, Freelance

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Work Background

SpotifyData Scientist

Sep. 2021 - Jan. 2024Estocolmo, Estocolmo, Suecia

Webstep ABData Scientist

Jun. 2021 - Feb. 2022Estocolmo, Estocolmo, Suecia

Utopia Music Senior Data Analyst

Nov. 2020 - Jun. 2021Stockholm, Stockholm, Sweden

Digital Workforce Services LtdData Scientist

Nov. 2018 - Nov. 2020Stockholm, Sweden- Agile: Scrum planning development - Machine learning | Deep Learning | Computer vision techniques applied to a multidisciplinary across-functional environment in a diverse technical team - Data scientist and ML candidates screening and interviews. - Working with large multinational clients using computer vision and NLP solutions.

BYON8Data Scientist

Feb. 2018 - Nov. 2018Stockholm, SwedenData mining with demographic and clinical data: • Data Acquisition • Exploratory Data Analysis • Preprocessing: Data imputation data cleaning and feature engineering Algorithms: KNN, Decision Trees, Random Forest, SVM, Logistic Regression. Ensemble Methods: Voting Classifier, Bagging (Bagged K-NN, Bagged Decision Tree), Boosting (Adaptive Boosting, Stochastic Gradient Descent Boosting, XGBoost) • Model Optimization: Hyper-Parameter Tuning, Regularization • Model Validation : stratified K-Fold Cross Validation Tools: Scikit-learn, Pandas, Seaborn, etc. using Python as the main language.

PwCCibersecurity consultant

May. 2017 - Oct. 2017Madrid y alrededores, España

MAPFRECibersecurity engineer (consultant)

May. 2017 - Oct. 2017Madrid, Comunidad de Madrid, EspañaIdentity Management Department • Incidences Management Oracle Identity Manager(OIM) • Identity management via Apache Directory Studio • Digital Identity Management & Governance and Electronic Signature • Electronic Certificates Management

Universidad Rey Juan CarlosResearch Assistant - Machine Learning

Sep. 2016 - Apr. 2017Statistical analysis and machine learning applied to demographic and clinical data. Built and deployed a solution that facilitates visual interpretation of relationships of certain diseases using statistical methods. Achieved cost reduction and time of research for physicians to apply certain resources to the appropriate patients.

BBVAIT engineer (consultant)

Jan. 2016 - Aug. 2016Madrid, Comunidad de Madrid, EspañaCarrying out projects in a big Spanish financial institution IT Quality Management & supporting at the IT department in Corporate and Investment Banking (CIB) across several geographies: * Analyzing and updating current service-level agreements (SLAs). * Defining new KPIs and performance thresholds. * Designing ACS/SLA.

ExergyIT and Software Engineer

Jul. 2015 - Oct. 2015Coventry, Reino UnidoSupporting the "Smart Monitoring" area at the company & development and implementation of the IT technology in connection with different projects.