Claudiu D.

Senior Java Developer

Claudiu is a Senior Java Developer with over 20 years of experience in enterprise software engineering, specializing in Java EE, Spring Boot, and microservices. He has delivered robust and scalable backend systems for high-profile clients, including HP, Qualcomm, Cybereason, and Eurostat.

He has expertise in REST API design, Kafka integration, and containerized deployments using Docker and Kubernetes, combining deep architectural knowledge with practical, hands-on development.

Throughout his career, Claudiu has worked across finance, telecom, and cybersecurity industries, contributing to full SDLC projects within distributed teams and employing Agile and RUP methodologies. He also brings extensive experience in CI/CD, automated testing, and mentoring, supporting the growth of engineering teams while ensuring high-quality software delivery.

Main expertise

  • Java
    Java 23 years
  • SQL
    SQL 15 years
  • Spring Boot
    Spring Boot 10 years

Other skills

  • Apache Kafka
    Apache Kafka 3 years
  • Kotlin
    Kotlin 1 years
Claudiu

Claudiu D.

Romania

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Selected experience

Employment

  • Senior Java Consultant

    Luxoft Romania (Client: Finastra) - 10 months

    Luxoft is a global digital strategy and software engineering company delivering bespoke solutions to clients across financial services, automotive, and telecom industries.

    • Led the migration of Finastra’s Pegasus platform from Flink and Micronaut to a modern Spring Boot–based architecture.
    • Refactored legacy modules into clean, modular Java 17 codebases, improving maintainability and reducing technical debt.
    • Streamlined CI/CD pipelines using Maven and Sonar, enforcing code quality and automated static analysis.
    • Ensured data consistency and performance through extensive regression testing and API refactoring.
    • Collaborated closely with DevOps to optimize build and deployment efficiency in distributed environments.

    Technologies:

    • Technologies:
    • Java Java
    • Spring Boot Spring Boot
    • Maven Maven
    • Git Git
    • SonarQube SonarQube
    • Apache Flink Apache Flink
  • Senior Java Consultant

    Orion Romania (Client: Qualcomm) - 1 year

    Orion Romania delivers advanced software engineering services to global clients, including telecommunications and IoT enterprises.

    • Enhanced backend features for Qualcomm’s Edgewise RAN Service Automation Platform, enabling smarter cloud-based 5G orchestration.
    • Developed and modularized services during the transition to a microservices architecture, improving scalability.
    • Provided Level 3 support and resolved complex backend issues to ensure uptime and operational reliability.
    • Implemented asynchronous communication using Kafka and ActiveMQ, increasing processing throughput.
    • Containerized applications with Docker and Helm charts for seamless Kubernetes deployments.

    Technologies:

    • Technologies:
    • MySQL MySQL
    • MongoDB MongoDB
    • Docker Docker
    • Java Java
    • Apache Kafka Apache Kafka
    • Spring Boot Spring Boot
    • Kubernetes Kubernetes
    • Helm Helm
  • Java Developer

    NEXTLEVELTEC - 3 years 2 months

    NEXTLEVELTEC is an IT consultancy specializing in delivering enterprise-grade software solutions and digital transformation projects for clients across multiple industries. The company provides technical expertise in backend systems, cloud architectures, and scalable microservice deployments.

    • Served as a senior Java consultant across several client projects, supporting the design, implementation, and optimization of enterprise applications.
    • Developed proof-of-concept (POC) solutions to validate new architectural approaches and technology integrations for client systems.
    • Built and maintained microservices using Spring Boot and Apache Kafka, ensuring scalability and reliability.
    • Implemented RESTful APIs and supported CI/CD workflows to streamline integration between distributed systems.
    • Participated in maintenance and feature enhancement tasks, improving performance and stability in production environments.
    • Collaborated with cross-functional teams to ensure best practices in code quality, documentation, and DevOps alignment using Kubernetes.

    Technologies:

    • Technologies:
    • Java Java
    • Microservices
    • Apache Kafka Apache Kafka
    • Spring Boot Spring Boot
    • Kubernetes Kubernetes
    • REST API REST API
  • Senior Java Consultant / Team Lead

    HCL Romania (Client: HP Inc.) - 9 months

    HCL is a global technology company providing IT and engineering services across industries including manufacturing, banking, and hardware.

    • Designed and implemented backend features for HP’s enterprise printer management platform (HPI-HpOne).
    • Led a 5-person developer team through the entire SDLC, ensuring technical alignment and timely delivery.
    • Deployed services in AWS and integrated S3 and Lambda for scalable data processing.
    • Performed code reviews, optimized microservices performance, and guided developers on best practices.
    • Coordinated with QA and DevOps to streamline CI/CD and reduce deployment errors.

    Technologies:

    • Technologies:
    • MongoDB MongoDB
    • Docker Docker
    • Java Java
    • Spring Boot Spring Boot
    • Maven Maven
    • AWS Lambda AWS Lambda
    • AWS S3 AWS S3
    • Git Git
    • SonarQube SonarQube

Education

  • BSc.Computer Science

    IT College of Bucharest University · 1998 - 2001

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