Resources for Developers


A curated toolbox of books, frameworks, and hands-on guides from the people at HappiHacking.

The BEAM Book

The BEAM Book

Book New Popular

The definitive guide to the Erlang runtime system

A must-read for any #erlang or #elixirlang developer. - @lucianparvu

#1 Bestseller on Amazon (Sweden) #1 New Release on Amazon (US) #1 on Hacker News Sponsored by Jose Valim (Elixir creator)

#1 Bestseller and #1 New Release on Amazon. Featured #1 on Hacker News.

Deep Dive: The BEAM for Developers

Deep Dive: The BEAM for Developers

Course Popular

A hands-on course for mastering the BEAM, tracing, debugging, and scaling real systems

I found the philosophical part useful for the team to design our applications. - Shraman, Delta Exchange

Hands-on Premium Certification
PhD Thesis "Efficient Implementation of Concurrent Programming Languages"

PhD Thesis "Efficient Implementation of Concurrent Programming Languages"

Book

Academic deep dive into the BEAM virtual machine, Erlang runtime system (ERTS), and robust distributed systems

The days are all empty and the nights are Unreal - cookie quote from the thesis.

Academic Research
Mastering Developer Productivity

Mastering Developer Productivity

Course

Empowers developers to find motivation, optimize workflows, and achieve balance for professional growth

A practical, actionable course for devs and leads: Build habits, optimize workflows, and get more done—without burning out. Based on proven productivity science and developer reality.

Premium 6 Modules
Strategic Foundations for Entrepreneurial Success

Strategic Foundations for Entrepreneurial Success

Course

Comprehensive coaching program for building profitable, sustainable businesses from strategy to execution

Finally got my business finances under control and found my true profit drivers. - Course Graduate

Premium Coaching Profit First
Kappa

Kappa

External

A tool for keeping large Erlang codebases-developed by multiple teams-in a manageable state

Kappa was conceptualized and started by Erik Stenman at Klarna to keep massive, multi-team Erlang codebases manageable and transparent. Now open source—ideal for analytics and codebase health at scale.

Open-source Klarna
The HappiHacking Blog

The HappiHacking Blog

Blog

In-depth guides, real-world post-mortems, productivity tactics, and BEAM insights from the field

Thank you for writing this book! I really wanted this a few years ago as I was debugging production Elixir. - bicx, Hacker News

Weekly Practical
Erlang and OTP in Action

Erlang and OTP in Action

Book

A practical, experience-rich guide to Erlang and OTP by Richard Carlsson and co-authors.

A long-awaited book that covers distributed programming from soup to nuts. OTP has grown over the years. This book shows the lessons learned. - Ulf Wiger

Classic
Erlang/OTP Contributions

Erlang/OTP Contributions

External

Contributed to Erlang/OTP during both the HiPE research era and ten years scaling Klarna.

Contributed to Erlang/OTP during the HiPE research era and throughout a decade scaling Klarna—patches, ideas, and insights that helped shape the runtime still used in production today.

Erlang

Coming Soon

Fintech Compliance Book

Fintech Compliance Book

Book

A practical guide to building scalable, compliant fintech platforms-bridging regulatory theory with hands-on architecture.

A hands-on guide to building scalable, compliant fintech systems. Written from the trenches: how to balance speed, security, and regulation in real product teams.

Coming 2025 Fintech
BEAM Tracing Cheatsheet

BEAM Tracing Cheatsheet

Guide

Fast, practical cheatsheet for tracing and debugging BEAM systems in production—covering redbug, modern :erlang tracing, and more.

Fast, production-safe tracing recipes for Erlang/Elixir: redbug, modern :erlang.trace, and more. Everything in this cheatsheet is field-tested on real incidents.

In Progress Free
Wireframe

Wireframe

Framework

A BEAM-native backend framework for rapid, compliant development

A BEAM-native backend framework for regulated industries—rapid development, built-in compliance, and developer ergonomics from the ground up. Coming soon.

Coming Soon Framework

Trusted by engineers at Klarna, WhatsApp, and featured at Code BEAM conferences worldwide.

Special thanks to our GitHub sponsors, including: shiguredo, umbec, christhekeele, josevalim, robinhilliard, hitdavid.

View all endorsements

Have a resource to share?

We're always looking for great BEAM and Elixir resources. If you know of a book, tool, framework, or guide that should be here, let us know!

Have a favorite BEAM tool or guide? Share it and help the community.

Build Better Systems and Careers: BEAM, Productivity, and Fintech Insights.


Happi Hacking AB
KIVRA: 556912-2707
106 31 Stockholm