Industries
Core banking replatforming without the downtime headlines
May 2026 · 8 min
Every core banking replatform carries the same risk: a bank's worst day becomes a public one. Across 14 markets, the approach that avoided downtime headlines was strangler-fig migration — running old and new systems in parallel, routing traffic gradually, and keeping a same-day rollback path live until the new platform had proven itself under real load.
The teams that got this right resisted the temptation to migrate everything at once. Slower, verifiable progress beat a faster all-at-once cutover every time.
