Markus Kohler

Display how many users are currently viewing a webpage in real time. Learn how to build a free web UI widget in under 5 minutes, backed by Presence.

Discover how to create a video streaming application with instant video calling using WebRTC and PubNub.

Learn how to build a Chatbot with a Custom Knowledge Base using PubNub Functions

The on-demand economy is a service or product built on letting users request a physical object, data, a service and have it fulfilled soon after.

Implement and display live-updating geolocation data on a real-time map using JavaScript with modern mapping APIs.

An updated overview of how to build an Android beacon (ie. iBeacon), including in-depth tutorials on building the emitter and detector.

Explore the comparison between AWS Transit Gateway and VPC Peering, and how they impact modern cloud networking decisions.

An in depth guide with examples on how to program WebSocket clients in Java and Android, using the Spring Boot framework.

Explore and compare modern realtime alternatives to WebSockets. Understand their advantages, limitations, and impact on web development.