José David Marroquin Toledo

Developer at Tracklib
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Contact Information
us****@****om
(386) 825-5501
Location
Stockholm, Stockholm County, Sweden, SE

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Experience

    • Sweden
    • Musicians
    • 1 - 100 Employee
    • Developer
      • Mar 2021 - Present

      Created Snowflake dashboards written in SQL cross-referencing data of thousands of users such as user level, description, subscription state and activity in order to visualize customer churn and retention patterns. Enabled multiple payment methods option with Django and Adyen API to allow customers paying different types of orders with different credit details. Have been in charge of on-boarding and off-boarding process of back-end developers. Wrote Notion documents for developers such as a handbook for developers on-call, a step-by-step guide to set up the local development environment and drew explanatory diagrams such as subscription model, orders and payments. Organize monthly company-wide back-end meetups to share programming tips and discuss coding standards and guidelines. Show less

    • Sweden
    • Research Services
    • 1 - 100 Employee
    • Consultant
      • May 2018 - Mar 2021

      Coded in Python, tested and deployed contracts between music rightholders and the global music streaming leader: 286 million of monthly active users, $1.8 billion total revenue in the first quarter of 2020. Decreased runtime of royalty calculation about 59% (11 hours). Migrated royalty calculator from Python 2 to Python 3. Supported Royalties and Technical Accounting teams of Stockholm and New York during month-end close periods while being on-call and once on-site in New York (June 2019). Did the design of my team's hoodie. Show less

    • IT Services and IT Consulting
    • 1 - 100 Employee
    • Analyst Programmer at Global Business Services
      • Mar 2017 - Mar 2018

      Implemented visual features with Ionic and IBM Cloud for the iOS and Android app of Bupa Chile.Designed and coded a proof of concept of an iOS and Android app to improve the property valuation process of Banco de Chile.

    • Student at Global Business Services
      • Jan 2017 - Mar 2017

      Built an iOS and Android application with Ionic Framework and IBM Cloud to book medical, dental and exam appointments for Bupa Chile.

    • Germany
    • Research Services
    • 500 - 600 Employee
    • Summer Student at Paranal Software Group
      • Jan 2016 - Mar 2016

      Created a scalable, interactive, easy-to-use and self-documented diagnosis tool to retrieve logs and display technical data of the Very Large Telescope from a PostgreSQL database, using Jupyter notebooks and Python. Created a scalable, interactive, easy-to-use and self-documented diagnosis tool to retrieve logs and display technical data of the Very Large Telescope from a PostgreSQL database, using Jupyter notebooks and Python.

    • France
    • Media Production
    • 1 - 100 Employee
    • Tutor
      • Jan 2015 - Jul 2015

      Taught Scratch programming language in three Chilean cities: Santiago, Valparaíso and Antofagasta. Created the LEGO MINDSTORMS EV3 learning module for the "Taller de Jóvenes Programadores" project. Taught Scratch programming language in three Chilean cities: Santiago, Valparaíso and Antofagasta. Created the LEGO MINDSTORMS EV3 learning module for the "Taller de Jóvenes Programadores" project.

    • Chile
    • Higher Education
    • 700 & Above Employee
    • Research Assistant at Photonics Laboratory
      • Dec 2012 - Sep 2013

      Using Arduino and Python, created a multipoint thermometer for an optics interferometer and a beam splitter within the projet 31110014 ALMA. Using Arduino and Python, created a multipoint thermometer for an optics interferometer and a beam splitter within the projet 31110014 ALMA.

    • Chile
    • Research Services
    • 700 & Above Employee
    • Computer Programming Undergraduate Teaching Assistant
      • Aug 2012 - Dec 2012

      Supported classroom teacher and did reinforce lessons about Python. Supported classroom teacher and did reinforce lessons about Python.

    • Primary and Secondary Education
    • 1 - 100 Employee
    • Consultant
      • Jan 2012 - Sep 2012

      Created a robot with fischertechnik robotics sets to solve the Renewable Energies and Robotics Competition (CERR, by its acronym in Spanish), and the Educational Robotics Olympics. Created a robot with fischertechnik robotics sets to solve the Renewable Energies and Robotics Competition (CERR, by its acronym in Spanish), and the Educational Robotics Olympics.

    • Instructor
      • May 2011 - Nov 2011

      Did workshops about robotics with LEGO MINDSTORMS NXT. Did workshops about robotics with LEGO MINDSTORMS NXT.

    • Guadeloupe
    • Wholesale
    • 1 - 100 Employee
    • Expert Seller at Special Services
      • Feb 2008 - Feb 2011

      Delivered information and expert advice to customers about products selling for home improvements. Managed and monitored sales throughout the national territory. Delivered information and expert advice to customers about products selling for home improvements. Managed and monitored sales throughout the national territory.

Education

  • Universidad Técnica Federico Santa María
    Computer Engineering
    2014 - 2018

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