Now
What is active right now.
Working On
Updated August 2026. This page is a short public note on active HappiHacking work: writing, systems material, fintech work, and the tools behind the site.
Writing and Field Notes
Essays and field notes on BEAM behavior, payment systems, architecture ownership, and technical judgment, written at the pace production work allows.
The BEAM Book and Code BEAM
A second edition of The BEAM Book is in progress, with a talk and a hands-on tutorial at Code BEAM in October. Runtime concepts get examples you can inspect and run.
Fintech Systems and Advisory
Practical work on performance, compliance, architecture, and delivery for regulated systems. The written side of this work is becoming the next book.
Accountable AI-Assisted Engineering
Spec-driven agent workflows with reviewable changes and traceability. The goal is engineering control that survives more capable tools.
The Workshop Itself
N.I.S.S.E., the site shell, word indexes, deployment scripts, and the operating practice that keeps everything running. Experiments and tools behind the workshop rather than products.
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.