David Santiago Fajardo Barrera
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David Santiago Fajardo Barrera

David Santiago Fajardo Barrera  new_releases

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Machine learning and Data Engineering | Python | SQL | Scala | C and C ++ | Reinforcement Learning
Bogota, Colombia
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Flexible work
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Jobs verified_user 0% verified
  • Nubank
    Senior Machine Learning Engineer
    Nubank
    Mar 2022 - Current (3 years 5 months)
    - *Developed data pipelines (ETLs) and helped with ML model training, monitoring, validation and ensure the data reproducibility using Python and Scala for acquisition machine learning models - Deploy Machine Learning based services for facial recognitions impacting directly about 300k customers and making decision process faster in about 15%
  • EPAM
    Senior Software Engineer
    EPAM
    Feb 2022 - May 2022 (4 months)
    - Developed data pipelines for machine learning models based projects, machine learning production roadmaps, set good practices for implementing machine learning models. Deploy 2 machine learning models for pricing and recommendations systems. - Make simulations to validate machine learning models and validate correct behavior of the data and stochastic process using Python.
  • Mercado libre
    Machine Learning Engineer public Remote experience
    Mercado libre
    Jan 2021 - Feb 2022 (1 year 2 months)
    - * Develop ETLs and help with ML model training using python to improve the open-rate in push notifications improving the health of the channel by 3.8% and getting an uplift of 20% versus organic sales - Developed ETLs using python to make data available to analyse pricing AB tests, helping to get the AB test results and check the business metrics, ended with an uplift of 5.6% of revenue and an uplift of 15.3% in product sales in multiple countries.
  • GlobalBit S.A.S
    Full Stack Engineer
    GlobalBit S.A.S
    Oct 2020 - Jan 2021 (4 months)
    - Split data pipelines to make them more efficient using concurrent and parallel computing, improving the average time of the pipelines by 30%. - Develop and deploy web apps using python (Django and Wagtail) and JavaScript (Vanilla JS and React)
  • Efecto Studios
    Gameplay Developer
    Efecto Studios
    Feb 2020 - Jul 2020 (6 months)
    - Develop and prototype the AI (Behavior trees) and senses (sight and hearing) for 3 different types of enemies, using C++ in UE4
  • S
    Fullstack developer
    Solbemor SAS
    Aug 2019 - Feb 2020 (7 months)
    - Develop a sustainable and profitable Micro Services Architecture for Android systems. Work with the developers and clients to ensure the product is profitable and fits the target demographic. - Worked as Scrum Master/Full Stack Developer, to help the team solve any current problems, and to make sure the product was viable for development.
  • B
    Full Stack Engineer/ML engineer
    Blink Mink
    Aug 2019 - Feb 2020 (7 months)
    - * Develop REST APIs and web apps visited by hundreds of people, working along the designers and clients using python (Flask and Django) and Typescript (React and Redux). - Develop machine learning models using python to classify users in clusters in order to get insights about the population environment.
Education verified_user 0% verified
  • Universidad Nacional de Colombia
    Computer and Systems Engineering
    Universidad Nacional de Colombia
    Aug 2014 - Jun 2020 (5 years 11 months)