Birdletter

Seoul, South Korea
August 2022 ~ June 2023

I worked as a back-end engineer on Villains, a mobile, squad-based battle royale.

Worked extensively with C#/ASP.NET to develop and maintain the back-end services for the game and its development. I've designed and developed several systems, from game functionalities to lower level systems (channels pub-sub system, session manager, interfacing with the databases...).

• Implemented and designed the functionalities and APIs for user facing in-game systems, including player groups, leaderboards, loot-tables, in-game invitations, and others.
• Implemented and designed systems level services, including an abstraction layer on top of redis's pub/sub features, a server performance profiler, a code generation tool for interfacing with SQL databases, a light and thread-safe Service Discovery and Registration library based on ZooKeeper, and others.
• Maintained and extended existing systems such as session-management and authentication, player clans, inventory and matchmaking.
• Deployed and set-up different services such as nginx, SSH, RabbitMq and MongoDb.
• Extensively worked with Docker, including building images for our services as well as deploying and managing different services.

Stan World

Seoul, South Korea
July 2021 ~ July 2022

I worked on the Java 11 + SmartFoxServer2X server that kept the StanWorld live-service running, and...

• Refactored and rebuilt over a dozen core-systems that prevented further development of the service due to bugs and performance and stability issues.
• Designed and implemented in-game features, as well as lower level systems while keeping them lean, readable, reusable, and performant.
• Identified and fixed complex problems that required technical knowledge and learning new things.
• Designed and developed the REST API that allows the management of our server and provides stats and metrics used for monitoring and dashboard-like applications.
• Upgraded our version control system from SVN to git.
• Managed and configured AWS services including Elasticache, EC2, and RDS.
• Maintained docker images for fast setup of the development environment (redis, mariaDB).

I worked extensively on tooling, and made...

• An integrated testing framework, via client-server scenario simulation,
• An stress testing tool and performance analysis tool,
• A native windows application (ImGUI) for live server monitoring,
• A powershell tool to aid our marketing team by gathering and showing relevant Twitter stats using their REST API.
• The build and deployment tools that got StanWorld through 5 major updates and other hotfixes.

As a team member...

• Mentored 2 junior developers without a formal background in Computer Science on the inner-working of computers and networks, while emphasizing the importance understanding from first principles.
• Improved collaboration between the development teams (client, server, and backend) by establishing a method and structure to the APIs that communicate our software; reducing the strong dependencies on each other (unnecessary questions, meetings...) during work.

I built a proof of concept TCP socket-server framework in c++ (built on top of ASIO), for StanWorld to be built upon. It included (de)serialization via flatbuffers and a "plugin" system (logging, connection pooling for sql, keep-alive system...). Ultimately, the project was scratched in favor of SmartFoxServer2X.

Lantek Systems Korea

Busan, South Korea
November 2018 ~ February 2021

I worked as part of the Development team in charge of writing and maintaining post-processors, c++ which programs translated the output of our cad/cam software to a machine readable format, such as g-code or manufacturer specific variants.

I worked in the Solutions team which manages the company’s large scale digital transformation projects. The main objective of these projects is to integrate our software and our customers workflow on a client to client basis.

• I managed and redacted technical documents (Requirements, Specifications...) of said projects.
• I designed software solutions taking into account each client's constraints and limitations, as well as ours.
• I developed said solutions together with the development team. The technology stack consisted mainly of SQL and .NET/ASP.NET (C#).