Jay Software is a software engineering firm located in Arad, Romania, that focuses on real-time systems, fintech solutions, and cloud-native infrastructure. We collaborate with scale-ups and funded startups in the US and Western Europe by integrating directly into their engineering teams to design, develop, and deliver production-grade software. Our projects encompass everything from new product development to platform modernization and ongoing technical support. Notable projects include a real-time audio moderation service that processes over a billion minutes with sub-50ms latency, a cryptocurrency payment platform that combines fiat and crypto transactions, and an internal enterprise platform for a global automotive company. We prefer to work with a select group of senior specialists rather than a large pool, ensuring that each engagement benefits from the appropriate expertise without unnecessary costs. Our core technologies include PHP, Laravel, Node.js, NestJS, Python, FastAPI, Go, Java, React, Next.js, Angular, TypeScript, React Native, Flutter, PostgreSQL, Redis, Kafka, Kubernetes, AWS, Docker, Terraform, WebRTC, and Rust.