Now
What is active right now.
Working On
Updated May 2026. This page is a short public note on active HappiHacking work: writing, systems material, tools, courses, and operating practice.
Essays and Systems Notes
More writing around BEAM behavior, ownership-driven architecture, payment systems, technical judgment, and field notes from production work.
The BEAM Book and Runtime Material
Keeping The BEAM Book visible, improving the surrounding course material, and making runtime concepts easier to inspect through examples.
BEAM for Developers
Course material, workshops, Livebook exercises, and practical debugging examples for engineers who need a better mental model of BEAM systems.
N.I.S.S.E. and Hidden Tools
A small browser VM, a site shell, word indexes, and odd utilities that make the site feel more like a workshop than a brochure.
AI-Assisted Engineering Practice
Spec-driven agent workflows, reviewable AI-assisted changes, traceability, and ways to keep engineering control as tools become more capable.
Operate in Practice
Running the site and related tools across staging, Bahnhof production, deployment scripts, security work, and agent-assisted maintenance.
Available For
Erik occasionally helps teams with difficult systems, architecture reviews, interim technical leadership, BEAM/runtime work, fintech and regulated systems, and AI-assisted engineering workflows.
