toptal.com
Contact us: +1.888.867.7001
Joohwan Oh, Software Developer in Vancouver, BC, Canada
Joohwan Oh

Software Developer in Vancouver, BC, Canada

Member since April 2, 2020
Joohwan has over eight years of professional experience in software development, specializing in distributed and back-end systems. His work history includes successful startups and big tech companies such as Amazon and Meta. Author of several popular open-source projects on GitHub, Joohwan works most often with Python, Django, and AWS.
Joohwan is now available for hire
Hire Joohwan

Portfolio

Experience

Location

Vancouver, BC, Canada

Availability

Part-time

Preferred Environment

Amazon Web Services (AWS), Linux, Git, Python, Django

The most amazing...

...experience I've had was from my open source projects, several of which made it to the front page of Hacker News and now have many users.

Employment

  • Software Engineer

    2021 - PRESENT
    Meta (Facebook)
    • Was a founding member of a critical back-end service for company-wide capacity management.
    • Designed and built highly scalable APIs and microservices using Thrift, Python, MySQL, and Hive.
    • Optimized one of the core microservices owned by the team and reduced its timeouts by 90%.
    Technologies: Apache Thrift, Python, Infrastructure, MySQL, REST APIs, React, TypeScript

  • Software Development Engineer

    2020 - 2021
    Amazon Web Services (AWS)
    • Led a team of engineers to deliver multiple projects end-to-end, adding new scheduling features to Amazon Connect.
    • Designed and built highly scalable APIs, microservices, and data pipelines using AWS.
    • Mentored other software engineers and interns in the team regularly.
    Technologies: Amazon Web Services (AWS), Git, Python, Java, TypeScript

  • Software Development Engineer

    2017 - 2018
    Amazon.com
    • Designed and built software and video games platform features, part of Amazon.com retail website.
    • Overhauled the web portal for onboarding third-party software vendors.
    • Trained the new intern and oversaw his internship project.
    Technologies: Amazon Web Services (AWS), Linux, IntelliJ, Git, AngularJS, Java

  • Software Engineer

    2015 - 2016
    Unata (acquired by Instacart)
    • Integrated Unata's eCommerce platform with third-party services such as Salesforce and Paypal.
    • Optimized the daily client data ingestion process and reduced its runtime by 80%.
    • Wore many hats and played vital roles in the back end, DevOps, and client meetings while the company grew quickly from 10 to 50+ people in a year.
    Technologies: Linux, Datadog, Git, Amazon Web Services (AWS), Redis, PostgreSQL, Flask, Python

  • Software Engineer Intern

    2013 - 2014
    Demonware (Activision Blizzard)
    • Implemented features for an operations tool for automating datacenter management workflows.
    • Created plugins for the automation tool to interface with MySQL and ArangoDB.
    • Built a datacenter topology visualizer for an in-house hackathon.
    Technologies: Linux, Jira, Git, ArangoDB, MySQL, Python

Experience

  • Python-Arango
    https://github.com/ArangoDB-Community/python-arango

    Original author and maintainer of Python-Arango. Python-Arango is the most popular Python driver for ArangoDB, a NoSQL graph database. The project started out as a hobby and gradually evolved into an official, production-ready library.

  • Binarytree
    https://github.com/joowani/binarytree

    Author and maintainer of Binarytree, an open-source Python library that provides a simple API to generate, visualize, inspect, and manipulate binary trees. It lets users skip the tedious work of setting up test data and dive straight into practicing algorithms.

  • Kafka Queue (KQ)
    https://github.com/joowani/kq

    Author and maintainer of Kafka Queue (KQ), an open-source Python library for enqueuing and processing jobs asynchronously using Apache Kafka as the back-end storage. The project received over 550+ stars on Github.

Skills

  • Languages

    Python, Java, TypeScript

  • Libraries/APIs

    REST APIs, Node.js, React

  • Tools

    Git, GitHub

  • Platforms

    Amazon Web Services (AWS), Linux, Docker, Apache Kafka

  • Frameworks

    Django REST Framework, Django, Flask, AngularJS, Apache Thrift

  • Paradigms

    Automation

  • Storage

    PostgreSQL, NoSQL, Redis, ArangoDB, Databases, MySQL

  • Other

    Distributed Systems, Infrastructure

Education

  • Bachelor's Degree in Computer Science
    2010 - 2015
    University of Toronto - Toronto, ON

To view more profiles

Join Toptal
Share it with others
Hire the top 3% of freelance developers TM