Job Summary: Design, lead, and oversee the technical architecture of a copy trading transactional system with external integration and cryptocurrency handling. Key Highlights: 1. Design and technical architecture leadership for transactional systems 2. Extensive backend and architecture design experience 3. Key competencies in systems thinking and technical leadership Job Objective Design, lead, and oversee the technical architecture of the copy trading transactional system with external integration and cryptocurrency handling. Required Technical KnowledgeArchitecture * Distributed systems design * Microservices * Event-driven architecture * REST API design * Resilience patterns (Retry, Circuit Breaker) * Idempotency * Concurrency handling * Transaction control Backend * Node.js (NestJS) or Java SpringBoot (advanced) * PostgreSQL (advanced optimization) * Redis * Kafka or RabbitMQ * WebSockets * OAuth / JWT * API security Infrastructure * Docker * AWS or GCP * Centralized logging * Monitoring (Prometheus, Grafana, ELK) Required Experience * +6 years in backend development * +3 years designing architecture * Experience in financial systems or payments * Experience in high-concurrency environments Key Skills * Systems thinking * Technical management * Ability to anticipate risks * Technical leadership **English C1 Advanced** Employment Type: Full-time Salary: Up to $25,000.00 per month Education: * Completed Bachelor’s degree (Mandatory) Work Location: On-site employment