/GraphQLConf 2025

-

Amsterdam, Netherlands
Back to Schedule

Christian Stangier, Kenneth Wußmann

Building a Serverless GraphQL Subscription Gateway for Event-Driven Architectures

-
Metropolitan A
GraphQL in ProductionSession Presentations

Christian Stangier

Senior Software Engineer, MOIA GmbH

Christian is a Software Engineer at MOIA GmbH, a company trying to improve urban transportation with ride-pooling. With over 12 years of experience as a full-stack developer, Christian is currently focused on building real-time tooling for fleet operators with GraphQL on serverless AWS.

Kenneth Wußmann

Tech Lead, Senior Software Engineer, MOIA GmbH

I currently work at MOIA, building serverless applications to operate an autonomous fleet of vehicles. My journey began in the Java EE cosmos, but over time I shifted to TypeScript, Serverless Architecture and GraphQL. I am fascinated by chess and its parallels to software development.

At MOIA we're working on a new approach to mobility using ride-pooling with autonomous vehicles. Running an autonomous fleet of vehicles requires access to real-time and low-latency telematic data. This data needs to be made accessible to our users on a fleet map to always have a detailed overview of the current fleet state. Using only queries and polling we quickly ran into scalability issues and had to rethink our approach. Therefore we went to the drawing board and designed and built a serverless architecture on top of AWS and GraphQL over WebSocket to support our stream-aligned teams in building serverless subscriptions in a microservice environment. Watch a replay of our journey enabling other teams to effortlessly push updates to their users using a shared subscription gateway.