I am part of the Open Source community, mainly in the node.js and Internet of Things ecosystems. I help maintaining and pushing forward the following projects:
Mosca is the MQTT broker that can be used as a module inside any node.js application. It supports several databases, such as LevelDB, Redis, MongoDB and backend brokers, such as Redis, MongoDB, RabbitMQ and ZeroMQ. I created Mosca as the basis of Ponte.
Ponte is a multi-protocol broker for the Internet of Things, it allows to connect devices using HTTP, MQTT or CoAP protocols. I created Ponte as part of my Ph.D. thesis.
LevelGraph is a Graph database based on top of LevelDB, and it uses an original technique to linearize a Graph in an ordered list, such as the one provided by LevelDB. I am also a committer on LevelUp: the node.js bindings to LevelDB. As a community, we are implementing custom, embedded databases in node.js and experimenting with old and new kind of replication.
I can offer professional support on using any of the OSS project I built, if you are interested, contact me.