SeniorSoftwareEngineer(Java,Go)

We’re modernizing the customer's platform by replacing legacy systems with a new architecture based on Go, NATS, Redis, and Postgres, while continuing to support and integrate with an existing Java/Spring and RabbitMQ ecosystem. You’ll contribute across both modern Go services and legacy Java platforms, helping to bridge existing systems, drive modernization efforts, and gradually replace older infrastructure with scalable, high-performance solutions. We’re hiring a Senior Engineer to design and develop the exchange and liquidity provider (LP) adapters - the core integration layer connecting our trading platform to external venues. In this role, you’ll work at the intersection of: \- trading workflows, including RFQ, quoting, and execution; \- real-time market data systems; \- external connectivity via REST, WebSocket, and FIX APIs. **Requirements** * Strong experience in Java and/or Go (you’ll use both); * Experience building API integrations (REST, WebSocket; FIX is a big plus); * Deep understanding of concurrency and performance; * Familiarity with event-driven systems (Kafka, NATS, RabbitMQ, etc.); * Strong debugging skills in distributed systems; * Trading / Domain experience (highly preferred): exchanges (crypto or TradFi), liquidity providers / market makers, RFQ or order execution flows; understanding of order lifecycles, latency and sequencing challenges, market data feeds; * Systems thinking - you're comfortable working with unreliable external systems, messy APIs and real-world edge cases; **Nice to have skills** * Experience working with the FIX protocol * Background in crypto trading infrastructure or exchange integrations * Familiarity with Redis, Postgres, and NATS * Experience modernizing or migrating legacy systems to newer architectures * Exposure to low-latency and high-throughput distributed systems **Responsibilities:** * Build and maintain exchange and LP adapters using REST, WebSocket, and FIX * Normalize external venue APIs into canonical int