Aidar Nygmet

Java / Kotlin Developer

Astra+ — logistics platform •Designed and implemented a Spring microservices backend from scratch, combining synchronous REST with Apache Kafka event streaming. •Integrated MinIO object storage and modeled relational schemas for scalable document management. •Stood up the full delivery pipeline: Docker, GitLab CI/CD, and a private Nexus repository for internal artifacts. E-Telegram — enterprise workflow product •Migrated branching business logic to the Camunda BPMN engine, making workflows transparent and editable without code changes. •Introduced Redis caching in front of primary databases, reducing latency on hot read paths and offloading the main DB. •Built a real-time notification service on Firebase Cloud Messaging (FCM). •Led incremental refactoring of Java modules to Kotlin for readability and null-safety. Eokno — national "Single Window" government services platform •Redesigned Oracle schemas and refactored the Jakarta Faces (JSF) layer, improving data integrity and maintainability of a high-traffic public-facing system. •Built SOAP / XML / WSDL integrations with national business and citizen registries, automating legal-entity and individual verification and eliminating manual checks. •Refactored the e-signature workflow using KalkanCrypt to meet current national digital-signature compliance requirements.

• Designed and implemented a Spring microservices backend from scratch
• Integrated MinIO object storage and modeled relational schemas for scalable document management
• Stood up the full delivery pipeline: Docker, GitLab CI/CD, and a private Nexus repository for internal artifacts
• Migrated branching business logic to the Camunda BPMN engine, making workflows transparent and editable without code changes
• Introduced Redis caching in front of primary databases, reducing latency on hot read paths and offloading the main DB
• Built a real-time notification service on Firebase Cloud Messaging (FCM)
• Led incremental refactoring of Java modules to Kotlin for readability and null-safety
• Redesigned Oracle schemas and refactored the Jakarta Faces (JSF) layer, improving data integrity and maintainability of a high-traffic public-facing system
• Built SOAP / XML / WSDL integrations with national business and citizen registries, automating legal-entity and individual verification and eliminating manual checks
• Refactored the e-signature workflow using KalkanCrypt to meet current national digital-signature compliance requirements

Java Developer

Enterprise Billing System — large-scale billing platform •Maintained and modernized a Java EE + Oracle platform, stabilizing long-standing pain points in critical financial flows. •Built a REST integration bridge between the billing system, SAP ERP, and the enterprise content management system; extended internal workflow tools on GWT. •Rebuilt the financial reporting pipeline on JasperReports, replacing manual preparation with scheduled automated generation. SBRE — Balancing Market System for Electrical Energy •Profiled and optimized core microservices, reducing processing time on the heaviest algorithmic workflows. •Migrated authentication from Spring Security to Keycloak, centralizing identity and introducing proper token lifecycle handling across services.

• Maintained and modernized a Java EE + Oracle platform, stabilizing long-standing pain points in critical financial flows
• Built a REST integration bridge between the billing system, SAP ERP, and the enterprise content management system
• Rebuilt the financial reporting pipeline on JasperReports, replacing manual preparation with scheduled automated generation
• Profiled and optimized core microservices, reducing processing time on the heaviest algorithmic workflows
• Migrated authentication from Spring Security to Keycloak, centralizing identity and introducing proper token lifecycle handling across services