Backend Engineer (Java)

Make this the place where you grow.

As a global leader in business and technology innovation, we work with top organizations worldwide to deliver solutions that create meaningful impact.

With 190,000+ professionals across 70+ countries, we blend deep expertise with a culture that values learning, curiosity, and collaboration.

We lead transformation and deliver secure, innovative, industry-specific solutions that move businesses forward. Our people drive everything we achieve, they think bold to deliver the outcome while ensuring every voice is heard.

NTT Data Greece is looking for a Backend Engineer (Java) to join our team in Athens.

Your role:

• Develop and maintain Java/Spring Boot backend applications and REST APIs based on functional requirements, technical specifications and OpenAPI contracts.
• Implement business logic, data validation, security, error handling and data persistence using MongoDB, including migrations and backward compatibility.
• Develop and maintain integrations with external systems, including synchronous REST APIs and asynchronous, event-driven processing.
• Ensure reliable and scalable backend solutions through retries, idempotency, transactional consistency and error recovery.
• Write clean, maintainable and testable code, including unit and integration tests, and participate in code reviews and quality assurance.
• Troubleshoot application defects and production incidents through debugging, log analysis and root-cause identification.
• Support CI/CD pipelines, automated deployments, containerised applications and Kubernetes environments.
• Implement application observability through logging, tracing and operational diagnostics.
• Collaborate with cross-functional teams in Agile/Scrum environments to deliver end-to-end features.
• Maintain technical documentation for APIs, integrations, application components and operational procedures.

Your Profile:

• 3-5 years of experience developing backend applications with Java and Spring Boot.
• Strong experience designing and developing RESTful APIs.
• Experience integrating external or third-party services.
• Experience working with MongoDB or other NoSQL databases.
• Good understanding of Spring Security and authentication mechanisms such as OAuth2 and JWT.
• Experience with unit and integration testing using JUnit and Mockito.
• Familiarity with Git, Maven, Docker, and CI/CD pipelines.
• Knowledge of OpenAPI/Swagger documentation standards.
• Understanding of containerized environments and Kubernetes-based deployments.
• Ability to analyse existing codebases, troubleshoot issues, and implement enhancements while maintaining code quality.

This role describes your starting point at NTT DATA. We believe in long ‑ term relationships and in supporting your growth. As your skills and ambitions evolve, we will work with you to identify future opportunities, projects, and career paths across our organization.

🌟 Why NTT DATA?

🤝 A collaborative and supportive culture

We foster an environment where curiosity, innovation, engagement, and teamwork are celebrated. Our people‑first philosophy is one of the core reasons we continue to be recognized globally.

🚀 Career development & continuous learning

Access a structured training path, ongoing learning resources, annual performance reviews, and a dedicated mentorship program — all designed to help you grow professionally and take on new challenges.

💻 Work–life balance supported by our BeFlex policy

As a company, we embrace a BeFlex approach that empowers our people with a level of flexibility in how they manage their workday.

✨ Global Top Employer

We are proudly certified as a Global Top Employer acknowledging our commitment to being a place where people can grow and thrive.

🌿 Health & well ‑ being first

Your mental well‑being matters. Employees have access to certified psychologists and online mental health workshops.

🌈 Diversity, Equity & Inclusion

We are committed to creating a workplace where everyone can thrive, regardless of gender, nationality, sexual orientation, disability, age, or background. Inclusion is part of who we are and how we work.

#WeAreAllUnique #YouMakeUsUnique

Benefits

Health insurance for the employee and one dependent family member (100% paid by NTT DATA)

Meal vouchers of 120€ per month (x12)

Corporate mobile phone: subscription & device

Teleworking equipment allowance

Internal Trainings Platform Account

Access to Open Up mental health service

28 days of paid annual leave consisting of your legal holidays and compensation days

Upon receiving an interview, you may request accommodation for any accessibility needs.

Sound interesting? Apply now or share it with a friend 🔹