Raphael-joel Lim
Senior Software Engineer at Limit Break
Shibuya, Japan
Summary
👤
Senior🎓
Top SchoolRaphael-joel Lim is a Senior Software Engineer with 13 years of experience building and operating backend systems for live games and fast-moving product teams, currently leading Core Services at Limit Break in Shibuya. He has deep experience with application servers, real-time socket infrastructure, cloud-native deployment, and blockchain integrations—having owned web3 backend components and NFT marketplace work for Legendary: Heroes Unchained. Raphael-joel is pragmatic about developer experience, repeatedly introducing tooling and platform improvements (Terraform, Redis Cluster, Spring DI, PyPy, AWS autoscaling) to speed delivery and reduce operational friction. A Stanford-trained mathematician, he pairs rigorous thinking with hands-on coding across Java, Python, TypeScript, and infrastructure-as-code. He also maintains asbplayer, a popular open-source language-learning app, reflecting a long-term interest in practical, user-focused tooling beyond his day job.
13 years of coding experience
11 years of employment as a software developer
Bachelor of Science (BS), Mathematics, Bachelor of Science (BS), Mathematics at Stanford University
Japanese, Chinese
Github Skills (113)
sentence10
language-learning10
media-player10
unity-webgl10
redis-client10
browser10
stream10
mining10
hls-stream10
java-client10
redisearch10
java10
subtitle10
object-mapping10
redis10
Programming languages (10)
Github contributions (5)
killergerbah/dynamap
Nov 2018 - Feb 2024
Dynamap is Java object model and mapping library for Amazon's DynamoDB database.
Contributions:30 pushes, 3 branches, 12 tags in 5 years 3 months
aws-dynamodbgroovyamazonobjectmapperdynamodb-database
killergerbah/asbplayer
Nov 2020 - Dec 2022
Browser-based media player and Chrome extension for subtitle sentence mining
Contributions:57 releases, 75 reviews, 790 commits in 2 years 1 month
sentenceanki-flashcardsmininglanguage-learningbrowser
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