Photo of Peter Ullrich

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.

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Products

Cover of Building Table Views with Phoenix LiveView

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.

Cover of Build an MVP with Elixir

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.

Cover of Building Forms with Phoenix LiveView

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

Thumbnail for blog post Build a Roles and Permissions System for Phoenix - Part 1

Build a Roles and Permissions System for Phoenix - Part 1

Learn how to control access to your system by assigning granular roles and permissions to your users.

04 December 2022
rap
elixir
Thumbnail for blog post Simulate Latency, Jitter, and Package Loss in Phoenix LiveView

Simulate Latency, Jitter, and Package Loss in Phoenix LiveView

Learn how to make your LiveView app more resilient by simulating bad internet connections.

13 November 2022
liveview
elixir
Thumbnail for blog post The Complete Guide to Full-text Search with Postgres and Ecto

The Complete Guide to Full-text Search with Postgres and Ecto

A detailed deep-dive into efficient full-text search for multiple languages, result ranking, tsvectors and tsqueries, search modifiers, and so much more.

06 November 2022
ecto
elixir
Thumbnail for blog post Efficient Name Search with Postgres and Ecto

Efficient Name Search with Postgres and Ecto

Search through millions of strings efficiently using indexed ILIKE or SIMILARITY queries.

16 October 2022
ecto
elixir
Thumbnail for blog post Prevent overlapping time ranges with Ecto and Postgres

Prevent overlapping time ranges with Ecto and Postgres

Block overlapping appointments efficiently in your database using exclusion constraints and don't worry about double-bookings ever again!

09 October 2022
ecto
elixir
Thumbnail for blog post Optimize Ecto's insert_all with Placeholders

Optimize Ecto's insert_all with Placeholders

Write more efficient bulk insert queries and avoid sending duplicate data by using placeholders.

01 October 2022
ecto
elixir
Thumbnail for blog post The complete guide to Upserts with Ecto

The complete guide to Upserts with Ecto

Implement insert-or-update functionality for your schemas directly with Ecto's on_conflict option.

23 September 2022
ecto
elixir
Thumbnail for blog post Organize your tests with context tags

Organize your tests with context tags

Clean up your test configuration and highlight test specifics with dedicated tags.

15 September 2022
exunit
testing
context
elixir
Thumbnail for blog post Import a CSV into Postgres using Elixir

Import a CSV into Postgres using Elixir

Learn how to dump and analyze large amounts of data from a CSV file into Postgres quickly.

10 July 2022
postgres
csv
elixir
Thumbnail for blog post Simulating Conway's Game of Life with 100.000 Erlang Processes

Simulating Conway's Game of Life with 100.000 Erlang Processes

Learn about how to tweak the performance of 100.000 Erlang processes and why Elixir isn't really that slow.

06 September 2021
development
elixir
liveview
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