Philip Kim, Software Developer in Washington, DC, United States
Philip Kim

Software Developer in Washington, DC, United States

Member since December 14, 2020
Phil is a full-stack web applications developer who has spent time on the Microsoft stack and in the Rails shop and is now working with a statically-typed language. He has worked in investment banking and federal contracting at business-to-business and consumer finance startups. Phil loves loosely-coupled, orthogonal software components written in concise, declarative code.
Philip is now available for hire




Washington, DC, United States



Preferred Environment

Vue, C#.NET, Ruby on Rails (RoR), Java

The most amazing...

...thing I've implemented is a distributed decision engine linking machine learning models and expert systems to produce the best available results in real-time.


  • Software Engineer

    2019 - PRESENT
    Fundrise, LLC
    • Served as a software engineer specialized in performance optimization for recurring back-end processes implemented in Java against a MySQL datastore. Reduced runtime and memory usage by 30 to 60%.
    • Designed and implemented a data model, processors, and back-end support for new features and products.
    • Collaborated with accounting and finance teams to design and implement systems and processes for end-of-quarter and end-of-year tax and regulatory compliance requirements.
    Technologies: MySQL, Hibernate, Java
  • Senior Software Engineer

    2017 - 2019
    Optoro, Inc.
    • Reimplemented SmartDisposition, a decision engine that connected machine learning models, various data sources, and expert systems to produce the best available decisions in real-time, including a custom domain-specific language for configuration.
    • Built quantitative models for key business processes to leverage more data into better decision making.
    • Developed across the entire stack, from the Vue.js web UI to the Apache Kafka message bus to deliver scalable, performant, and maintainable software.
    Technologies: Apache Kafka, Vue, PostgreSQL, Ruby
  • Senior Software Developer

    2013 - 2016
    Sanametrix, Inc.
    • Led a team that developed a case management system for the United States Department of Housing and Urban Development.
    • Developed a survey collection web application for the United States Department of Education.
    • Saved a project that was poorly scoped and behind schedule and led an accelerated development effort to deliver it on time and under budget.
    Technologies: Entity Framework, React, C#.NET


  • SmartDisposition for Optoro

    This was an API service that drove critical, real-time business decisions. It comprised a directed dependency graph of machine-learning models, internal and external data sources, and expert systems. SmartDisposition executed as many concurrent paths through the graph as possible in order to deliver the best available results on a time-sensitive basis.

    I reimplemented the entire application using the Ruby concurrency library and designed a custom domain-specific language for configuring the dependency graph that enabled loose coupling between the graph nodes.

    Because the parts of the system all varied in their degree of CPU usage, I/O usage, and reliability, this enabled us to have a robust, performant system that maximized throughput, minimized latency, and could handle failures gracefully.


  • Languages

    Java, C#.NET, JavaScript, Python, Ruby
  • Frameworks

    Hibernate, Ruby on Rails (RoR)
  • Storage

    RDBMS, PostgreSQL, MySQL
  • Libraries/APIs

    Vue, React, Entity Framework
  • Platforms

    Apache Kafka


  • Bachelor of Science Degree in Computer Science
    2013 - 2015
    University of Maryland - College Park, MD
  • Bachelor of Arts Degree in Anthropology
    1996 - 2001
    Yale University - New Haven, CT

To view more profiles

Join Toptal
Share it with others