Milorad B.

Backend / Platform Engineer | Node.js, Java, AWS | SaaS Systems

Backend / Platform Engineer focused on building scalable SaaS systems and high-performance backend architectures. I specialize in: • Node.js, Java, TypeScript backend systems • Microservices and distributed architectures • Performance optimization and Core Web Vitals improvements • SaaS platform development • AWS infrastructure and scalable data pipelines Additionally, I specialize in technical and behavioral conversion rate optimization (CRO) — designing backend systems and frontend performance improvements that directly increase user conversion. This includes: • performance optimization of conversion-critical flows (checkout, order forms) • backend architecture for high-speed transactional systems • feature-flag driven experimentation and A/B testing infrastructure • data-driven UX and behavioral optimization in SaaS funnels Recent work includes: • Built an ETL platform processing 1M+ records monthly • Reduced checkout load time from ~1s to ~400ms via caching architecture • Developed microservices processing thousands of images daily • Integrated BigCommerce, Salesforce and Brevo pipelines handling 50k+ transactions daily Tech stack: Node.js • Java • TypeScript • AWS • Docker • PostgreSQL • MongoDB • Fastify • Spring Boot