Senior Software Engineer (IR-525)

Our customer is developing next-generation infrastructure for institutional digital asset trading and payments, connecting clients, liquidity providers, exchanges, banks, and payment networks through a low-latency, event-driven platform. As part of this transformation, the legacy systems are evolving into a modern distributed architecture powered by Go, NATS, Redis, and Postgres, while maintaining interoperability with existing Java/Spring and RabbitMQ services throughout the migration. The customer's platform enables real-time value movement across trading, treasury, settlement, and payment operations. We are seeking a Senior Software Engineer to architect and develop payment integrations and financial infrastructure services – the core layer that enables seamless connectivity between the customer's platform and external payment providers, banking networks, custodians, and fintech ecosystems. This role combines expertise in payment systems, treasury and settlement operations, asynchronous transaction processing, API integrations, and distributed systems engineering. You’ll contribute to both modern Go-based services and existing Java systems, supporting the development of robust, scalable payment features while driving upgrades to legacy infrastructure