Remote-first (Italy preferred) Full-time freelance | Long-term (12+ months) We are looking for a backend engineer who deeply understands how systems work under the hood.This role focuses on building and evolving high-performance financial infrastructure powering instant trading and crypto-native financial products.This is strictly a backend role. What You'll Work OnHigh-throughput C#/.NET backend servicesReal-time trading workflowsEvent-driven architecturesStateful systems and persistent connectionsPerformance optimization and concurrency managementLow-latency APIs and financial flowsScalable distributed systems What We ExpectStrong knowledge of C# / .NET internalsSolid understanding of memory management (stack vs heap)Concurrency, multi-threading, async patternsExperience building real-time or low-latency systemsUnderstanding of TCP / / WebSocketsExperience in fintech, trading, crypto or banking systemsStrong ownership mindset If you think you are a match, please apply here