Microservices architecture development;REST API contracts development and implementation;Microservices patterns implementation (API Graway, Rate limit, Saga, Circuit Breaker,etc.)

• REST API development;
• Amazon AuroraDB integration (multiple READ/WRITE replicas datasources);
• Database (PostgreSQL) migration with Liquibase.

• existing Software design and architecture improvements;
• performance testing and optimization;
• legacy code to modern tech-stack migration;
• team-members coordination, planning, and sync meetings related to crossingfunctionality within the Kanban methodology.

• Performance issues solving;
• OOD improvementDesktop UI functionality extending;
• Kubernetes/Helm configuration.

• Drools API extending;
• Development and maintenance of microservices from scratch;
• FIXML and SWIFT data formats and its DTO integration to project business logic.

• MasterCard 3DS ACS service certification preparation
• Custom authentication messages fields validation mechanism implementation

• ElasticSearch to HBase metadata migration;
• HBase versioning implementation;
• Docker network configuration

• Implementing new functionality;
• REST API development;
• Database redesign

• Implementing new functionality;
• New design development and its integration;
• Web crawler development

• Implementing new functionality;
• Web Services migration RPC to REST.

• New design development and its integration;
• Project documentation development and code documenting;
• Code cleaning and optimizing.