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Cristian Badea

@cristianbadea

Senior backend software engineer specializing in Java microservices, zero-downtime deployments, and event-driven architectures.

Romania

Message

What I'm looking for

I’m looking for a Java backend role building reliable microservices and platforms—partnering with product teams, owning architecture (DDD/hexagonal), and delivering zero-downtime releases with strong observability and engineering discipline.

I’m a Senior Software Engineer with 11 years designing and building highly available distributed systems using Java. I focus on backend platforms where microservices, reliability, and clean architecture directly improve outcomes.

I bring deep expertise in Domain Driven Design and Hexagonal architecture, keeping business logic isolated from external dependencies and infrastructure concerns. I build distributed persistence with MongoDB and high-performance caching with Redis, then optimize latency and throughput for real workload patterns.

I’ve implemented event-driven messaging with RabbitMQ and Kafka while maintaining continuous delivery pipelines with zero downtime deployments. In my current role as Software Engineering Manager, I help teams expand payment solutions across regions, monitor production using Prometheus and Grafana, and drive agile execution through sprint planning and continuous improvement.

Across prior roles, I delivered RESTful and service contracts using OpenAPI, built real-time collaboration and enterprise backends, and added test coverage with JUnit, Mockito, and Testcontainers. I also strengthen security with OAuth 2.0 and JWT and troubleshoot production issues using logs, metrics, and distributed tracing.

Experience

Work history, roles, and key accomplishments

Current

Software Engineering Manager

Current

Stefanini Emea

Jun 2021 - Present (5 years)

Designed and developed highly available backend microservices in Java using Spring Boot and Domain Driven Design with hexagonal architecture to isolate business logic from infrastructure concerns. Built event-driven integrations with RabbitMQ and Kafka, implemented distributed persistence with MongoDB and Redis, and led zero-downtime deployments on Kubernetes.

Java Spring Boot Microservices Architecture Domain Driven Design Hexagonal Architecture MongoDB Redis RabbitMQ Kafka Kubernetes

Senior Software Developer

Netop

Sep 2019 - May 2021 (1 year 8 months)

Built scalable Java/Spring Boot microservices for real-time collaboration with high availability requirements. Implemented DDD aggregates, MongoDB persistence, Redis caching, and event-driven communication with RabbitMQ, and delivered integration testing using JUnit, Mockito, and Testcontainers.

Java Spring Boot Domain Driven Design MongoDB Redis RabbitMQ Kubernetes Junit Mockito Test Containers

Senior Software Developer

Endava

Sep 2018 - Aug 2019 (11 months)

Engineered backend microservices using Java and Spring Boot, designing REST APIs with OpenAPI specifications for clear service contracts. Implemented asynchronous processing with RabbitMQ and added OAuth 2.0 and JWT-based authentication and authorization while troubleshooting production issues using logs, metrics, and distributed tracing.

Java Spring Boot Microservices Architecture OpenAPI MongoDB Redis RabbitMQ OAuth 2.0 JWT RESTful APIs

Software Developer

Stefanini

Nov 2015 - Aug 2018 (2 years 9 months)

Developed backend services and REST APIs in Java with Spring Boot, building data access layers using Hibernate and JDBC for reliable transaction management. Wrote unit tests with JUnit, performed input validation and error handling, and collaborated on peer reviews while supporting production incident resolution.