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I am Riccardo Balbo, a freelance developer working on game technology, graphics, backend systems, web applications and open protocols.

I like practical software, small teams, and projects that move from a rough idea to something people can actually use.

P.IVA 05607610283

Project highlights

A small selection of engines, libraries and production web work.

Game engine

jMonkeyEngine

A historic 21+ year Java 3D engine project where I contribute as a core developer.
P2P networking

Hypergate

A zero-configuration encrypted tunnel for connecting containers and machines across NAT.
Game engine

Nostr Game Engine

A Java engine and application framework for Nostr and Bitcoin-native apps.
Nostr library

Nostr4J

A Java Nostr client library with Blossom, wallets, and WebRTC over Nostr for p2p apps.
Wallet integration

NWC Provider

An LNbits plugin that adds Nostr Wallet Connect support for wallet and payment flows.
E-commerce

Shop La Rabiosa

A serverless e-commerce site built for an Italian wine producer, covering catalog, checkout and payment processor integration.

Embedded Nostr

Nostrduino

A Nostr library for Arduino and microcontrollers, including Nostr Wallet Connect support.
Java on iOS

libJGLIOS

An iOS support stack for Java apps with SDL3, OpenAL, OpenGL ES, ANGLE/Metal and GraalVM Native Image.

Open source work

Open source projects I've built and repositories I maintain or contribute to.

4.6K GitHub stars
156 open source projects
28 languages used
2K contributions last year

NostrGameEngine nostr4j

Powerful Nostr client library with NostrRTC, Blossom, Wallets and much more.

anser-liquid

Anser is a client-side web app that uses the Alby extension's liquid integration to provide a simple interface to the Liquid Network.

jme3-bullet-vhacd

This is a library that uses java bindings for Khaled Mamou's V-HACD to decompose concave meshes into hull-shapes in jmonkey engine.

v-hacd-java-bindings

Java bindings for V-HACD (https://github.com/kmammou/v-hacd)

NostrGameEngine nge-platforms

A collection of platform-specific code exposed through a single API (HotSpot, GraalVM, Android, TeaVM, iOS)

NostrGameEngine ngengine

A game engine and framework for building games and applications integrated with the Nostr ecosystem

JCubemapAssembler

JCubemapAssembler is a java application that can be used to assemble six separate face images into a single cubemap and export it as a dds file.

hypergate

Hypergate is a zero-configuration, peer-to-peer encrypted tunnel that enables easy communication between Docker containers and/or physical machines located anywhere, even behind NAT.

NostrGameEngine libdatachannel-java

A fork of libdatachannel C Java wrappers: libdatachannel-java intended to be used within the Nostr Game Engine codebase.

nostrduino

Nostr and NWC for ESP32 Arduino

jme-igui

A minimalistic immediate gui for jmonkeyengine

blender_effekseer_addon

Blender 3.3 addon that renders effekseer effects in blender's viewport.

jme-effekseerNative

This is a library that uses EffekseerForMultiLanguages to load and render effects made with Effekseer in jme.

DDSWriter

DDSWriter is a command-line utility and java library to write compressed and uncompressed DDS.

jMonkeyEngine jmonkeyengine

A complete 3-D game development suite written in Java.

Skills

Over the years I have gained experience in various fields, including game development, 3D art and full-stack web development.

Contact

If you have a paid project or need focused technical help, I am available for prototypes, integrations, game technology, backend systems and open protocol work.