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SUMMARY:Leaving the appliances: what seven years of open-source migration 
 taught us - Christophe Boulanger
DTSTART;TZID=Europe/Luxembourg:20261007T113000
DTEND;TZID=Europe/Luxembourg:20261007T130000
DTSTAMP:20260916T160757Z
UID:pretalx-open-source-conference-luxembourg-2026-9NBSTY@pretalx.com
DESCRIPTION:API Gateway\, ESB\, Web Access Management and WAF - from propr
 ietary products to Tyk\, Keycloak\, Traefik and CrowdSec.\n\nReplacing a s
 ecurity appliance with open source is almost never a like-for-like swap. W
 e set out to move our entire web middleware security stack - API Gateway\,
  ESB\, Web Access Management\, application WAF - onto Tyk\, Keycloak\, Tra
 efik and CrowdSec. The first component has been in production since 2019\;
  other workstreams are still under way.\n\nWe will share what that journey
  actually cost and taught us: how to escape XSLT transformations hardcoded
  inside a product\, by turning real traffic captures into unit tests\; why
  moving from Web Access Management to Keycloak is a change of security mod
 el rather than a change of tool\; what you learn when an open-source ingre
 ss controller stops being maintained and you have to migrate under time pr
 essure\; and why a load balancer's custom traffic rules remain the hard pa
 rt\, with no mechanical translation available.\n\nWe will be honest about 
 what we are leaving behind - our WAF appliance is robust\, well-tooled and
  trusted by auditors - and about the real trade: every workstream swapped 
 a licence cost for code we now maintain ourselves.\n\nThis is a workshop\,
  not a lecture. Five questions go to the room\, including the ones we have
  not settled - particularly around PKI\, as public certificate lifetimes h
 ead towards a few tens of days.
LOCATION:Decentralisation in practice
URL:https://pretalx.com/open-source-conference-luxembourg-2026/talk/9NBSTY
 /
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SUMMARY:From z/OS to Iceberg: An Insurer's Open Source Decade - Christophe
  Boulanger\, David Burgermeister
DTSTART;TZID=Europe/Luxembourg:20261007T145000
DTEND;TZID=Europe/Luxembourg:20261007T151000
DTSTAMP:20260916T160757Z
UID:pretalx-open-source-conference-luxembourg-2026-X9YJDT@pretalx.com
DESCRIPTION:In 2020\, Foyer switched off its mainframe in production. Twen
 ty months\, 12\,000+ COBOL/EGL programs and batch\, moved from z/OS to Lin
 ux and Java\, with a three-day go-live and a single month of code freeze. 
 That was not an open-source project\, but it is where open source became a
  real option.\n\nThis is a consumer's story\, told by two of the people wh
 o lived it. Since 2017\, we have replaced proprietary layers one at a time
 : z/OS to Linux\, IBM WebSphere to Tomcat\, Tanzu to vanilla Kubernetes. O
 ur platforms now run on Kubernetes\, offering services such as MongoDB\, K
 afka\, Elasticsearch\, MinIO\,... and supporting technologies like Angular
 \, Go\, Scala/Play and Java.\n\nOur most ambitious bet yet is a fully open
 -source Data Platform based on Apache Spark\, Iceberg\, Polaris\, airflow
 \, openmetadata\, dbt\, Trino and Superset.\n\nWe will walk through that t
 imeline honestly\, including what did not work: tools we adopted and dropp
 ed\, and licence changes that forced us to decide all over again\, sometim
 es to stay\, sometimes to leave.\n\nOne outcome we did not plan for: open 
 source changed who wanted to work for us. Several of our infrastructure an
 d platform engineers joined Foyer because of this stack. Open source has r
 aised our overall skill level\, and it helps us attract talent.\n\nThe las
 t part is about the debt: nine years of consuming open source and giving t
 oo little back. We will share what we are committing to now\, contributing
  upstream\, opening internal code\, and building the internal organisation
  that makes it repeatable.
LOCATION:Auditorium
URL:https://pretalx.com/open-source-conference-luxembourg-2026/talk/X9YJDT
 /
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