We Built It for One. Then Everything Multiplied.
summary
A concrete postmortem: a single-account, single-portfolio Euro-only app becomes a multi-account, multi-portfolio, multi‑currency platform while keeping most code and users. The team modularizes ~1.2M LOC into 200 modules, migrates RX to coroutines, adopts Ktor and kotlinx.serialization, rewrites UI in Jetpack Compose and ships a node-based navigation system. A redesign triggers 90,000 one-star reviews in two weeks and a 14‑day war room recovery. Built a multi-portfolio orchestrator, junior (child) accounts, four portfolio types, a custodial crypto wallet, card and Polish currency support; GrowthBook feature flags cause experiment-assignment headaches.
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chapters (19)
- 0:00Welcome
- 1:07Trade Republic team
- 2:112021 failure to opportunity
- 4:42Vision: Europe’s largest wealth manager
- 6:32GameStop era impact
- 7:59NextGen rewrite project
- 10:46Redesign: modal-first navigation
- 12:30International rollout
- 17:11War room: 1-star reviews surge
- 23:40Failure to 10M customers
- 24:43Scaling multi-account and portfolio
- 25:45France launch with tax benefits
- 28:42Child savings accounts across Europe
- 32:14Poland expansion with multi-currency
- 34:4690-day portfolio launch
- 36:36Diversifying with private markets
- 37:21The culture that made it all possible
- 39:26Trade Republic’s future
- 40:30Q&A
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