Senior Java Fullstack Engineer (Java & React)

Domain: Supply Chain & Enterprise Logistics

Engagement: Long-term contract

Daily Rate: €250–280/day

Working arrangements: Romania, remote

About the Opportunity

We're looking for an experienced Senior Java Fullstack Engineer to contribute to the development and evolution of a large-scale logistics platform used to support complex retail supply chain operations.

The platform connects distribution centers, suppliers, and stores, enabling efficient logistics network planning, route management, and delivery operations.

You'll join a cross-functional Agile product team working with Java, Spring Boot, React, and cloud-native technologies on Google Cloud Platform (GCP).

This role goes beyond feature development. We're looking for an engineer who can take ownership of technical solutions, contribute to architectural decisions, and deliver reliable, scalable software.

What You'll Be Working On

• Design, develop, and maintain distributed backend services and REST APIs using Java and Spring Boot.
• Build and enhance frontend applications using ReactJS.
• Work with microservices and event-driven architectures to support complex business workflows.
• Design and optimize relational data models, SQL queries, and database schemas.
• Contribute to application security, automated testing, code quality, and performance improvements.
• Participate in technical design discussions, code reviews, and continuous improvement initiatives.
• Collaborate with product managers, architects, and domain experts throughout the software development lifecycle.
• Support application deployment, monitoring, and ongoing platform reliability.

What We're Looking For

• 8+ years of hands-on software engineering experience, ideally building complex, distributed applications.
• Strong proficiency in Java (8/11/17) and the Spring Boot ecosystem.
• Solid experience with Spring MVC, Spring Data JPA, Spring Security, and REST API development.
• Practical experience with ReactJS and modern frontend development.
• Strong SQL skills and experience with relational databases, particularly PostgreSQL.
• Experience with microservices, event-driven systems, and asynchronous processing.
• Familiarity with reactive programming (Project Reactor), Spring Integration, and scheduling/caching mechanisms.
• Experience with automated testing using JUnit, Mockito, and Spring Test.
• Understanding of software design principles, clean code, and Domain-Driven Design (DDD).
• Experience with Git-based development workflows, CI/CD, Docker, and Kubernetes.
• Familiarity with AI-assisted development tools such as GitHub Copilot.
• Fluent English and the ability to collaborate effectively in an international Agile environment.

Nice to Have

• Hands-on experience with Google Cloud Platform, particularly Pub/Sub, IAM, Secret Manager, and Cloud SQL.
• Experience with Flyway database migrations and advanced PostgreSQL capabilities.
• Exposure to Spring WebFlux and reactive testing.
• Familiarity with monitoring and observability tools such as Datadog or ELK.

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