Most fintech systems optimize for speed or compliance, but not both.
The result is weekend fire drills or missed markets.
Good engineering gives you both.
Code BEAM Berlin 2025
Building Fintech Systems That Stay Fast and Stay Compliant
Architecture choices that let you deploy on Friday and pass audits on Monday.
Ledger-first architecture. Typed money that survives JSON round-trips. Isolation boundaries that contain PSP failures. Audit trails that turn compliance into queries.
Patterns from Klarna, tested under pressure.
Fintech Scale Checklist
20 traps that stall growth.
Architecture traps. Compliance traps. Performance traps. Operations traps.
Each includes a BEAM-specific solution and timeline.
Building Scalable Fintech Systems
A field guide for practitioners. Coming Q2 2025.
Compliance without bureaucracy. YBYOYR culture. BEAM patterns for audit logging. Rolling releases in regulated environments.
For CTOs, developers, and compliance leads.
Why the BEAM
The BEAM was built for systems that move money and cannot fall over.
Processes are separated by default. Ledger entries are written once, never overwritten. Arbitrary-precision integers mean money values survive JSON round-trips.
Most compliance requirements map naturally to runtime properties the BEAM already has.
