Desenvolvedor(a) Java Especialista – Autorização de Transações

Requisitos

• 8+ years of Java development experience
• 3+ years in transaction authorization systems (acquirer, sub-acquirer, processor, issuer or gateway)
• Java 11+ (ideally 17 or 21) with concurrency, multithreading, Virtual Threads and JVM/GC tuning
• Low-level network communication: TCP/IP sockets, persistent connections, Netty or NIO
• Deep ISO 8583 knowledge (MTIs, bitmaps, DEs, subfields, per-brand variations), using jPOS or custom implementations

Desejáveis

• Kubernetes
• Experience with HSMs (Thales payShield, Utimaco) and cryptographic commands
• Terminal certification and EMV kernels experience, or capture protocols (TEF, ABECS, e-commerce APIs)
• Experience with anti-fraud engines (rules and real-time machine learning models)
• Knowledge of Pix, Open Finance or other instant payment schemes