Andrés Ruiz, Software Developer in Amsterdam, Netherlands
Andrés Ruiz

Software Developer in Amsterdam, Netherlands

Member since October 3, 2019
Andrés is a US-educated software engineer with ten years of experience tending to computers to solve human problems. He is proficient in Java, Python, Go, Elixir, JavaScript, Linux, and various databases. Andrés has been a part of large and small companies, which has helped him better understand the critical components necessary for software to be successful.
Andrés is now available for hire


  • Spotify - Main
    Go, Docker, Kubernetes, Test-driven Development (TDD)
  • Unidex
    JavaScript, TypeScript, React, Node.js, Web3.js...
  • Vercer
    Go, Test-driven Development (TDD)



Amsterdam, Netherlands



Preferred Environment

Vim Text Editor, JetBrains, Linux

The most amazing...

...project I've created and supported is a platform to track and better understand settings for buying inventory for Amazon Fresh.


  • Software Engineer

    2022 - PRESENT
    Spotify - Main
    • Implemented a throttling ad delivery mechanism, bringing close to $250,000 in revenue for Q2/2022.
    • Helped migrate multiple microservices to a Kubernetes cluster, saving developers close to 100 hours on ops-related tasks.
    • Designed and implemented a feature that allowed customers to include multiple ads in a podcast, bringing close to $100,000 in revenue for Q2/2022.
    Technologies: Go, Docker, Kubernetes, Test-driven Development (TDD)
  • Lead Full-stack Developer

    2021 - 2022
    • Worked closely with a designer on a complete refactoring of the UI, which increased conversion rates by 15% and made our platform more attractive to investors.
    • Designed and developed a system to create, manage, and execute leveraged transactions, which brought close to $1 million in revenue in 2021.
    • Collaborated with a team of three developers to maintain and improve various aspects of the trading platform, specifically limit and market orders, increasing our user base from 100x in 1 year.
    Technologies: JavaScript, TypeScript, React, Node.js, Web3.js, Test-driven Development (TDD), CSS, HTML
  • Software Engineer

    2021 - 2021
    • Developed an app that helps traders visualize order book offerings for future trading in the energy sector.
    • Helped write automated tests to verify the application was successfully calculating different statistics.
    • Collaborated with traders and clearing houses to make sure our application adhered to the best standards.
    Technologies: Go, Test-driven Development (TDD)
  • Machine Learning Engineer

    2018 - 2019
    3D Hubs
    • Developed the necessary infrastructure to move the machine learning pipeline to AWS.
    • Contributed to the design and implementation of integrations with multiple external services for accounting (QuickBooks) and finance (Stripe).
    • Designed and implemented automated refunds, which saved close to 10 hours a week for all our customer support representatives.
    • Developed a 3D geometric search algorithm to find similar pairs of 3D models.
    Technologies: JavaScript, PostgreSQL, Python, Amazon Web Services (AWS), Neural Networks, Python 3, Test-driven Development (TDD), QuickBooks API, CSS, HTML
  • Sofware Engineer

    2016 - 2018
    • Created and supported a platform to track and better understand the settings for buying inventory for Amazon Fresh.
    • Developed an application to help allocate inventory to physical spaces in the most optimal way possible.
    • Collaborated with an external team to design and implement tracking of inventory in a more granular fashion, which enabled the team to save close to 100 man/hours per month.
    Technologies: Amazon Web Services (AWS), MySQL, Java, AngularJS, Test-driven Development (TDD), HTML



  • Languages

    Go, Python 3, JavaScript, Python, TypeScript, CSS, HTML, Java 9, Elixir, C++, Java, ECMAScript (ES6), Elm
  • Libraries/APIs

    QuickBooks API, Stripe, React, Stripe API, Vue, NumPy, Web3.js, Node.js
  • Paradigms

    Test-driven Development (TDD), Scrum, UX Design
  • Tools

    AWS SDK, JetBrains, Vim Text Editor
  • Platforms

    Linux, Docker, MacOS, Google Cloud Platform (GCP), Amazon Web Services (AWS), AWS Kinesis, Kubernetes
  • Storage

    PostgreSQL, MongoDB, MySQL, Amazon S3 (AWS S3), Amazon DynamoDB
  • Frameworks

    Django, Spring, AngularJS
  • Other

    Intuit QuickBooks, Machine Learning, Software Development, Algorithms, Neural Networks


  • Master's Degree in Computer Science
    2014 - 2016
    University of New Mexico - Albuquerque, NM, USA
  • Bachelor's Degree in Computer Systems Management
    2009 - 2014
    National University of Colombia - Bogotá, Colombia

To view more profiles

Join Toptal
Share it with others