Summary
Oracle Certified Java Developer | Software Engineer | Java | SpringBoot | AWS | Kafka | PostgreSQL | Kotlin | Hibernate | Docker |Angular | FlutterSkilled Java Software Engineer with several years ofexperience designing, developing, and maintaining robust backendsystems across industries such as payment system, healthcare,finance, and cryptocurrency. Proficient in microservice architecture,modular systems, and cloud-based solutions. Adept at integratingthird-party systems, optimizing legacy platforms, and implementingsecure, scalable infrastructure. Strong team collaborator with apassion for learning and performance optimization.
Experience
- Migrated a legacy persistence layer from Hibernate 5 (custom DAOs, HQL) toSpring Data JPA 3, simplifying the codebase and aligning with the latest SpringBoot stack.
- Refactored DAOs into Spring Data repositories, updated transactionalboundaries, and ensured backward compatibility with existing business logic.
- Designed, developed, and operated a proprietary payment platform based ona modular backend architecture.
- Integrated 20+ third-party payment providers into the core platform, extendingsupported payment methods and markets.
- Collaborated with cross-functional teams to plan migration phases, mitigateproduction risks, andimprove maintainability and performance of core services.
- Implemented key features such as payment cascading, multi-currencyprocessing, and data analytics to improve conversion and monitoring.
- Provided L3 technical support for production issues, performing root causeanalysis and ensuring high system availability and reliability.
- Built and evolved microservices-based SaaS platforms for media and financedomains, from feature design to production operations.
- Designed, implemented, and maintained cloud-native microservices runningon Kubernetes, ensuring clear API contracts (REST/gRPC) and backwardcompatibility.
- Maintained and optimized Jenkins-based CI/CD pipelines for containerizedservices, streamlining builds, automated tests, and deployments toKubernetes.
- Refactored and migrated legacy services to a modern Spring Boot/Kafkaarchitecture, improving performance, resilience, and scalability
- Delivered service-oriented healthcare platforms compliant with Class Bmedical software standards (e.g. IEC 62304), focusing on safety and reliability.
- Designed and implemented secure RESTful and gRPC services for handlingmedical and device data, including authorization, validation, and auditability.
- Built internal tools and test harnesses for validating and automating tests ofClass A medical devices and their integrations.
- Collaborated closely with multiple cross-functional teams (firmware, QA,DevOps) to ensure smooth integration and reliable end-to-end delivery.
- Worked on a cryptocurrency trading platform with a strong focus on secureuser management and account protection.
- Developed and tested features for the core trading application, includingorder handling, user workflows, and real-time updates.
- Implemented and maintained authentication/authorization with SpringSecurity, robust PostgreSQL data persistence, and WebSocket-basedcommunication.
- Wrote comprehensive unit and integration tests to ensure reliability andprevent regressions in critical flows.
Certifications
Certificate of Completion: Al FluencyFramework & FoundationsOracle
Certified Professional, Javase 21 Developer
AI for Research and Insights
AI for Content Creation
Working in a Digital World:Professional Skills IBM
