Automating API Contracts: Shifting Left for Faster Frontend & Backend Development

Presentation byEduardo 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.

Presented with these Guilds
Cover Photo for JavaScript Monthly London Meetup
Primary Photo for JavaScript Monthly London Meetup

JavaScript Monthly London Meetup

Javascript evolution has sped up (a lot) in recent years and event the most veterans developers find it hard to keep up with the latest trends. This meetup group aims to bring you monthly bite-sized updates on the world of Javascript along with a healthy dose of nice people, beer and pizza.

  • Please use your full name when registering, as some of our venues require a full list of attendees beforehand. You have an idea and you want to be a speaker?

We are always looking for more speakers - submit your talk here (https://docs.google.com/forms/d/e/1FAIpQLSdFaatfveOUbrmer47jYb5J4J4ttxAFc1CgTjUDltBXmDOJmg/viewform)

1.1K Members
Similar Presentations

Automating API Contracts: Shifting Left for Faster Frontend & Backend Development

Presentation byEduardo 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.

Presented with these Guilds
Cover Photo for JavaScript Monthly London Meetup
Primary Photo for JavaScript Monthly London Meetup

JavaScript Monthly London Meetup

Javascript evolution has sped up (a lot) in recent years and event the most veterans developers find it hard to keep up with the latest trends. This meetup group aims to bring you monthly bite-sized updates on the world of Javascript along with a healthy dose of nice people, beer and pizza.

  • Please use your full name when registering, as some of our venues require a full list of attendees beforehand. You have an idea and you want to be a speaker?

We are always looking for more speakers - submit your talk here (https://docs.google.com/forms/d/e/1FAIpQLSdFaatfveOUbrmer47jYb5J4J4ttxAFc1CgTjUDltBXmDOJmg/viewform)

1.1K Members
Similar Presentations