In-memory data structure store used as a cache, database, message broker, and vector/document query engine.
Opinionated framework for building production-ready, standalone Spring applications with minimal configuration.
Distributed event streaming platform for building high-throughput data pipelines and streaming applications.
Fork of Paper, the Minecraft server, that ticks independent chunk regions in parallel on a thread pool.
Ruby on Rails source code for Gumroad, an e-commerce platform that lets creators sell products directly to consumers.
Free and open source distributed RESTful search and analytics engine built on Apache Lucene.
Offline IP-to-region lookup library and data management framework supporting IPv4 and IPv6 with xdb query clients.
Self-hosted, federated social network server implementing ActivityPub for publishing posts, media, and following users across servers.
Distributed file and object storage system that serves S3, POSIX file system, and Iceberg/Lance table access from one Go binary.
Open source server powering lichess.org, a free, ad-free online chess platform with realtime games, analysis, and tournaments.
Open-source, self-hostable payments infrastructure in Rust that connects to many payment processors and offers routing, vault, and reconciliation modules.
TypeScript library for building type-safe production applications with typed errors, dependency injection, structured concurrency, and schema validation.
A free, cohort-based course teaching ML engineering: training models, exposing them via APIs, and deploying with Docker, Kubernetes, and AWS Lambda.
Typesense is an open-source, in-memory search engine with typo tolerance, faceting, geosearch, and vector search.