Primary sources and surviving public artifacts for the central career points. First-person biographical claims remain identifiable and are not presented as third-party confirmation.
Gin and CFEngine document accepted contributions. NetFlow shows project maintenance. The Lift team page, Netty, Lift Cookbook, ERGO and petal.build each document the specific role stated there. The historical HackerOne ranking is linked separately with its period and screenshot, not confirmed by the current live leaderboard.
The Kleinanzeigen.de role and dates, founding and ownership of 2342, and the rack and hosting history are presented here as Franz Bettag’s biographical statements. His own websites and project descriptions do not independently confirm those statements.
Building AI and making it understandable: in episode 22, “Die digitale KI-Revolution”, Franz Bettag discusses AI in the workplace, machine learning for businesses and ethical questions. Published on May 21, 2025. ERGO introduces him as an AI expert in the episode description. A public expert appearance, not a client reference.
Accepted contributions, projects of my own and debugging collaboration, with documented roles and original sources.
#2 VDP Security Researcher Germany — HackerOne Q1/2026. The live leaderboard is unfiltered and reflects the current standing, not a Q1/2026 snapshot; the talk with the ranking screenshot documents the historical standing at the time of the ranking.
Lead/Sole Engineer for Kleinanzeigen.de, 2014–2019. Rebuilt and operated the FreeBSD platform end to end in Go, before its sale to eBay. First-person biographical claim.
Founder & Owner of 2342 Holding.
Listed as an Elixir/Phoenix Engineer and AI specialist at petal.build. This listing refers to Franz Bettag personally, not an endorsement of Bettag Systems as a consultancy.
Liftweb committer since January 2012, still listed by the project today.
Professional profile and career history.
Projects with problem, role, architecture, results and limitations: the bug bounty platform, Aquila, ranching.farm, badge.gallery and UsageReset.
Lift Cookbook by Richard Dallaway (O’Reilly, 2013) names Franz Bettag in its Contributors section as a recipe contributor. The source history documents his contribution “Sitemap with Snippets” and a subsequent revision.
Netty links to two contributions by Franz Bettag: the talk “Liftweb and Netty for Web Development” (2012) and the technical article “Netty Channels and Scala Implicits”, published on January 26, 2013. One talk and one article, not two talks.
Surviving artifacts for the Rogue MongoDB DSL integration and Liftweb work.
Own rack infrastructure since 2005. The historical progression from leodom.net through qs-housing.net to anycast.io, together with its early infrastructure context, is traceable through archive and RIPE sources.
Public event pages, slides and recordings.
First-party technical publishing, code and company context.
Franz Bettag’s Anthropic course certificates complement his hands-on work on AI systems. The certificate page shows the original documents; the bug bounty case study explains model roles, tools and verification in his own system.
