FinTech Collective, LLC is seeking a Senior Software Engineer for the Core Platform team that runs a real-time payment ledger. You will work on how transfers are accepted, recorded and confirmed, with strong emphasis on correctness under high concurrency.You’ll own design, write tests, review code, profile performance, and lead cross-team initiatives such as partitioning and capacity planning. The stack is TypeScript/Node.Js, PostgreSQL, Kafka, on Kubernetes, and success is measured by
📌 Senior Backend Engineer (Barcelona)
🏢 FinTech Collective
📍 Barcelona
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