Here are some of the small contributions I've made to open-source projects, either personally or as part of my job:
LZ4 is a fast LZ compression algorithm. It provides a streaming interface to LZ4 data streams as well as low level compress and uncompress functions for LZ4 data blocks.
Fun pull-request that implements support for linked block decompression in Go, with an Assembly version of it (contributions).
BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner.
Contributed to the BuildKit project by fixing numerous race-condition bugs happening only when building dozens of images in parallel (contributions).
ingress-nginx is an Ingress controller for Kubernetes using NGINX as a reverse proxy and load balancer.
Numerous fixes and features to improve stability, and make ingress-nginx production-ready for larger websites (contributions).
Kubernetes is an open-source container orchestration platform that automates application deployment, scaling, and management. It provides a flexible and scalable infrastructure for running distributed systems and microservices.
Tiny stability fixes but not always easy to debug, happening when running Kubernetes at scale (contributions).
A fast JSON parser and Object marshaller as a Ruby gem.
Memorable debugging session during Christmas to track down why our news feed was suddenly being corrupted. The fix involved correcting the initialization of new fields in the JSON parser (contributions).
Home Assistant is an open-source home automation platform that allows you to control and automate your home devices.
Bringing CalDAV support to Home Assistant, allowing users to trigger automation based on calendar events (e.g. warming up home when landing at the airport) (contributions).