Mircea Stefanescu, AI Platform Engineer | Java, Spring Boot & AWS Specialist | Kubernetes & Microservices Developer

About

Seasoned AI Platform Engineer and Full Stack developer with experience in designing and deploying scalable microservices and cloud‑native solutions. Proficient in Java, Spring Boot, AWS services (Lambda, API Gateway, RDS), Kubernetes, Docker, and Terraform. Experienced in building AI platform infrastructure, developing microservices for transportation systems, and leading full‑stack applications with Angular. Collaborative team player committed to continuous improvement and delivering robust, high‑quality software.

Experience

Hitachi Rail

Sep 2025 – Nov 2025

Romania

AI Platform Engineer

• Operated Kubernetes clusters (RKE2, K3s) running containerized Java/Spring services; implemented scalable deployment, resource governance and resilience patterns for AI/ML workloads. • Standardized platform operations using Rancher and Cloud Foundry; integrated RabbitMQ and Postgres/Redis for event-driven, data-intensive services and enforced secrets management via HashiCorp Vault. • Implemented observability with Rancher Monitoring and Elasticsearch/Kibana dashboards and alerts, improving performance tuning and reducing time-to-diagnosis. • Built Python automation for cluster checks, configuration validation, deployment verification and log/metric queries, reducing manual toil and increasing consistency.

Cognizant Mobility Romania

Apr 2023 – Aug 2025

Romania

Java Engineer - Java Microservices & AWS

• Designed and developed Java microservices with Spring Boot, enabling modular logistics features and maintainable codebases. • Migrated monolithic functionality to an event-driven architecture using Apache Kafka and AWS SQS/SNS, enabling scalable asynchronous processing. • Built serverless functions with AWS Lambda, API Gateway, and RDS to deliver new capabilities with improved cost efficiency. • Implemented GraphQL APIs and integrated them into an Angular frontend for responsive and dynamic client interactions. • Automated infrastructure provisioning on AWS using Terraform and streamlined deployment pipelines via GitHub Actions and ArgoCD. • Collaborated closely with product managers and cross-functional teams to define requirements, improve performance, and ensure timely delivery.

EOS KSI Romania

Jul 2021 – Apr 2023

Romania

Full-Stack Engineer (Java/Spring, Angular)

• Developed full-stack Java/Spring Boot microservices and Angular components to deliver new features for financial and logistics applications. • Replaced monolithic modules with microservices, enhancing scalability and maintainability. • Integrated third‑party payment services and a CRM platform, customizing microservices and Angular interfaces to support new workflows. • Optimized performance by profiling applications, tuning database queries, and implementing caching strategies with Redis. • Collaborated with UX/UI designers to improve user experience and responsiveness across devices. • Implemented unit and integration tests with JUnit and Mockito to ensure code reliability.

Education

Bucharest University of Economic Studies (Faculty of Cybernetics, Statistics and Economic Informatics)

Oct 2018 – Jun 2021

Bachelor of Economic Studies in Computer Science, Computer Science

Mircea Stefanescu

AI Platform Engineer | Java, Spring Boot & AWS Specialist | Kubernetes & Microservices Developer

Skills

Languages