Hey, I'm Peter! Developer & Educator.

I'm a Senior Elixir developer with a Psychology background, PragProg Author, Public Speaker and Blogger, and Founder. I'm passionate about Software Architecture, Product Engineering, and sharing knowledge.

Products

Building Table Views with Phoenix LiveView

Data is at the core of every business, but it is useless if nobody can access it. This book shows you how to generate business value by making your data accessible with advanced table UIs.

Build an MVP with Elixir

New to Elixir? This video course gets you started by developing a real-world product using Phoenix LiveView, deploying it to Fly.io, adding payments to it using LemonSqueezy, and more.

Building Forms with Phoenix Liveview

Creating forms in LiveView is easy - until it's not. This course teaches you how to build forms like a pro and to avoid the pitfalls along the way.

Blog Posts

Easy Mocking in Elixir

Quick, dependency-free mocking in Elixir tests. Learn how to configure your mock once and use it everywhere. Simple and effective for all test suites.

The Saga Pattern in Elixir

Explore the Saga pattern in Elixir for managing complex, multi-step processes. Learn about choreography and orchestration approaches, with code examples for implementing long-lived transactions.

Resurrect your Phoenix Context

A retraction: I changed my mind about Phoenix contexts. Here's how I structure my Elixir code with a simpler, more effective design in the true functional way.

Handle Phoenix Exceptions gracefully

Silence the noisy Phoenix.NotAcceptableError and Plug.CSRFProtection.InvalidCSRFTokenError exceptions in your Phoenix application by implementing the Plug.Exception protocol for them.

13 April 2024

phoenix

Distribute your Files Globally with Tigris and Fly.io

Serve your files quickly to users all around the globe with just a small configuration change using Tigris' globally distributed S3-compatible storage solution.

Resize User-provided Images with Cloudflare Images

Learn how to upload user-provided images to Cloudflare Images and to resize them into size variants that are optimal for your application.

Sending Emails with Swoosh and Oban

Learn how to send emails from robust Oban workers so that you'll never miss sending an email again.

17 December 2023

personal

Every Ending is a new Beginning

Announcing my departure from employment life and the start of my freelancing and entrepreneurship life. At least until further notice.

13 December 2023

personal

Test an external, read-only Repository in Phoenix

When your application connects to an external database in read-only mode, it becomes difficult to write proper tests for it. This post explains how to set up a simulated external database locally to make testing becomes easy again.

Work with Files in Livebook

Learn how to upload, process, and download files to and from Livebook.

06 November 2023

livebook

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