Rade Aleksic

Senior Backend Engineer with 8+ years of experience designing and building scalable distributed systems in fintech and healthcare domains. Expert in Java, Spring Boot, microservices architecture, and Apache Kafka, with a strong computer science background and proven problem-solving skills. Known for architecting, optimizing, and owning mission-critical systems end-to-end.

Experienced in leveraging AI-assisted development tools (GitHub Copilot, Claude Code) to improve productivity and code quality.

Senior Software Engineer at Code Reflect (Client: FIS Global) (2020-01 – Present)

• Led development of a mission-critical Summary Balance Service within a large-scale distributed microservices architecture, currently processing 5–10 million Kafka events per hour
• Drove 5x+ throughput improvement through targeted performance tuning and architectural optimizations
• Designed and implemented Kafka-based event-driven processing pipelines for high-volume financial data
• Owned the service end-to-end in production: monitoring, incident resolution, and root cause analysis
• Coordinated engineers and ensured alignment across system architecture and business requirements
• Designed scalable architecture using Java, Spring Boot, and microservices principles
• Translated business requirements into technical solutions; produced component diagrams, sequence diagrams, and database models
• Ensured integration with existing distributed systems and services
• Implemented delta and batch processing for financial balance calculations
• Built integration pipelines between legacy systems and new microservices
• Developed tooling for stress testing and performance validation
• Contributed to overall microservices architecture across multiple teams
• Identified and resolved scalability and performance bottlenecks
• Participated in migration from monolithic architecture to microservices

Software Engineer at Deloitte Middle East (2023-01 – 2024-12)

Digital Bank Project

• Developed core banking microservices covering accounts, payments, and fund transfers
• Built and maintained a Card Service integrating with multiple external card issuers via REST APIs
• Improved system scalability and reliability within a cloud-native Docker/Kubernetes environment
• Collaborated with frontend and QA teams for end-to-end feature delivery

Software Developer at Vicert Inc (2018-01 – 2020-12)

• Developed REST API gateway for healthcare data transformation
• Converted Redox data models to FHIR-compliant formats
• Optimized Scala and Spark data pipelines for large-scale data processing
• Maintained and enhanced Java-based microservices in containerized environments
• Implemented business workflows using BPMN tooling
• Built HL7 integration pipeline for communication with external healthcare systems
• Developed backend services and supported frontend applications (React, React Native)

Computer Science – Faculty of Mathematics, University of Belgrade

Computer Engineering – Technical School Trebinje