React Advanced London Meetup: Shifting Left with Automated API Clients & more!

👋 Hey folks,

Ready to get inspired by insightful talks, make new connections, and enjoy great networking opportunities? Join us on May 22 for a deep dive into all things React!

To attend the meetup please ➡️➡️➡️ REGISTER HERE ⬅️⬅️⬅️ via Guild.

🗣 Call for Proposals
Have an idea or story to share? Submit your talk proposal through our CFP form and take the stage at one of our upcoming meetups!

🤝 Organized by
This event made possible thanks to the support from React Summit, JSNation and React Advanced Conference organizers – GitNation.

🤝 Hosted by
Huge thanks to Zoopla!

Win at moving, and find your next home with Zoopla.

Zoopla is one of the UK’s most instantly recognisable property brands. In fact, we’re known and loved by over 91% of the nation (and we’re working hard on the other 9%). Our mission is to help the nation make better home decisions - by connecting everyone to their home and giving them personalised insights to help with moving, managing or financing.

Over 50 million people visit Zoopla every month to access exclusive data and information on every UK property, search over 500,000 homes for sale and rent, find the best agents and secure the latest mortgage deals.

We’re a growing, dynamic team that embraces innovation and isn’t afraid to push the boundaries.

🤝 Want to support our community?
We’re looking for venue partners and sponsors for future meetups. Let’s discuss collaboration — contact us!

🕑 Event Schedule

• 18:30 - Doors open - snacks, beer, socialization
• 19:00 - Opening notes
• 19:10 - Shifting Left with Automated API Clients - Eduardo Aparicio Cardenes
• 19:35 - Synced Reactive State: Build React Apps Without Backends - Anselm Eickhoff
• 20:00 - Networking, Open Mic Lightning Talks
• Mingle until 21:00 pm

🗣️ Talks:

➡️ Shifting Left with Automated API Clients by Eduardo Aparicio Cardenes
API contracts are the backbone of modern frontend-backend collaboration, but manual integration slows teams down and increases errors. What if we could automate it?
In this talk, we’ll dive into Shift Left API contract development and introduce an approach to automatically generate an NPM package from API contracts. This package provides:
✅ TypeScript types for strict FE & BE consistency
✅ Zod validation for safer forms and API responses
✅ Axios + React Query for streamlined fetching & caching
✅ Automated versioning & observability to ensure API integrity
By shifting API validation, testing, and integration earlier in development, teams can move faster, reduce errors, and improve efficiency. Whether you're a developer, tech lead, or architect, this session will give you practical strategies to automate your API workflows and accelerate your development pipeline.

➡️ Synced Reactive State: Build React Apps Without Backends by Anselm Eickhoff
Jazz is a framework for building React apps without a backend. It takes the familiar idea of reactive state and adds real-time sync to the cloud and other users. You can set precise edit permissions on each bit of state right from the client as well, which means that basically all business logic now lives next to your UI. In this talk, we'll see what this looks like in practice by building a multi-user app that also works offline and across devices -- in no time.
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👍 Code of Conduct
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📩 Contact
events@gitnation.org
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