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

Animate a Side Drawer with LiveView.JS

LiveView.JS is great for client-side animations because no round-trip to the server is needed. Here's how you can use JS to animate a side drawer.

19 August 2023

liveview

elixir

Unaccented Name Search with Postgres and Ecto

Postgres does not support searching for names with special characters by default. Here is how to fix it.

How malicious libraries can steal all your application secrets

Adding libraries is a massive security risk. They gain FULL access to your configuration, database, and file-system. Here's how they could steal them and how to protect yourself.

22 July 2023

security

elixir

Kill your Phoenix Context

Phoenix Contexts often become a dumping ground for code that doesn't have an obvious place. Learn how to organize your code using services, finders, and repositories.

18 June 2023

architecture

phoenix

Upload Encrypted Files to S3

Encrypting sensitive user files before uploading them to S3 is a must. This post shows how to encrypt and upload them and also how to download and decrypt them again using encryption keys unique per user.

Announcing my new Video Course!

My first video course "Build an MVP with Elixir" helps you to get started with Elixir by building a real-world product together!

Listen to Database Changes with Postgres Triggers and Elixir

Postgres Notifications allow you to subscribe to any changes in your database, even if they weren't made by your Elixir application! Let's learn how to set them up!

12 February 2023

postgres

elixir

Build dynamic Forms with JSON Schemas

Define custom forms without writing a single line of HTML. JSON Schemas help you define and adjust forms and validate user input all through a single configuration file.

08 January 2023

elixir

liveview

Use Neural Networks in Livebook

The latest Livebook version 0.8 comes with a new smart cell type that makes experimenting with neural networks like StableDiffusion, GPT2, and others incredibly easy. Let's learn how to get started.

10 December 2022

livebook

elixir-nx

Build a Roles and Permissions System for Phoenix - Part 2

Learn how to prevent PII leaks from your Ecto queries by adding query restrictions to your Roles and Permissions system.

05 December 2022

rap

elixir

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