Rostyslav Popadyn

Senior Full-Stack / Backend Engineer with 10+ years of experience designing and building scalable, high-performance systems across fintech, healthtech, and aerospace domains. Specialized in Python (Django, FastAPI), Golang, and Ruby on Rails, with strong expertise in microservices architecture, RESTful APIs, and event-driven systems. Proven track record of delivering production-ready solutions, optimizing performance, and leading backend initiatives in distributed environments. Experienced in cloud-native development across AWS, Azure, and GCP, with hands-on work in Docker, Kubernetes (AKS/EKS), and Infrastructure as Code using Terraform. Skilled in building reliable data pipelines, integrating third-party services, and maintaining high availability systems with robust monitoring and CI/CD practices. Strong background in PostgreSQL, MongoDB, and Snowflake, with a focus on performance tuning and scalable data architectures. Also experienced in blockchain systems, AI/ML integrations, and secure distributed systems. Known for ownership, fast execution, and the ability to turn complex, ambiguous requirements into reliable, scalable products.