February 25-27, 2026
Montreal, Canada
Avoiding Déjà Vu: Building Resilient APIs with Idempotency
Repeated API requests happen more often than we'd like - double clicks, flaky networks, retries, and proxies can all replay calls unexpectedly. Without idempotency, this can lead to duplicate charges, broken state, and confused users.
This talk explores what really goes wrong when idempotency is missing, how companies like Stripe and Shopify design for retries in practice, and why implementing idempotency is often far simpler than we expect!
This talk explores what really goes wrong when idempotency is missing, how companies like Stripe and Shopify design for retries in practice, and why implementing idempotency is often far simpler than we expect!
Paul Conroy
Square1 Software
As CTO of Square1, a leading digital agency in Dublin, Paul brings 20+ years of experience building high-traffic applications across Europe. He's led teams, shaped products, and navigated the challenges of transitioning from developer to manager. An accomplished international speaker, he's passionate about sharing insights on technical leadership and the evolving world of software development.
