clean architecture, and production-grade code System design skills - you can design scalable, maintainable systems and articulate trade-offs clearly API design expertise - REST, WebSockets/SSE, and understanding of distributed systems patterns Database proficiency - SQL and NoSQL (DynamoDB, PostgreSQL, OpenSearch), including query optimization and data modeling Testing mindset … with LLM observability (Langfuse), token management, streaming, and reliability patterns AWS expertise - Lambda, ECS, DynamoDB, OpenSearch, Bedrock, or similar cloud services Streaming architectures - SSE, WebSockets, event-driven systems Fintech/compliance background - AML, sanctions screening, KYC, or regulated industry experience Micro-frontend experience - Module Federation, independent deployability Infrastructure as Code ...