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Andreas Køhler
Backend developer, Node.js and PostgreSQL
★ 4.6 (5)Copenhagen, Denmarkon Kestro since August 2026
Rate
€55.00/hr
I design APIs and data models. I like the problems where payments, queues and consistency meet — the places where a bug costs money.
Portfolio
Payment gateway for a marketplace
Escrow, partial refunds and bank reconciliation. Handles around 9,000 transactions a day.
Node.jsPostgreSQL