Senior Backend Engineer

ABOUT HARBOR LAB

Founded in 2020 in Greece Harbor Lab is a fast-growing B2B maritime tech company on a mission to simplify and optimize port cost management. Our end-to-endAI-powered SaaS platformtransforms how Shipowners and Shipmanagers handle Disbursement Accounts (DAs) bringing automation real-time data control and transparency to one of the most complex and costly parts of global shipping.

But we dont stop there. Harbor Lab also powers a thrivingMarketplace connecting Principals with a global network of vetted Port Agents and Vendors.

At Harbor Labpeople come first. Our culture is anchored in ambition trustworthiness genuine care and agilityvalues we bring to every interaction with our customers and our team. Were proud to be consistently recognized as aBest Workplace() and recently certified as aGreat Place to Work (2024).

If youre looking to make a global impact grow alongside passionate peers and shape the future of maritime innovationwed love to meet you.

ABOUT THE ROLE

Were looking for a Senior Backend Engineer to design build and scale the services that power our products. Youll collaborate closely with a cross-functional team contribute to architecture decisions and tackle complex performance and scalability challenges while remaining hands-on with our backend stack Java 17 Spring Boot 3.5 RabbitMQ PostgreSQL JPA/Hibernate Maven/Gradle Groovy JUnit and a microservices architecture deployed on Kubernetes.

If youre passionate about solving complex problems and optimizing performance at every layer this role is for you.

WHAT YOU WILL BE DOING

• Shape and evolve our backend architecture and microservices ensuring systems are scalable maintainable and secure.
• Participate in full-stack design discussions from APIs and messaging to data modeling and deployment.
• Build services with Spring Boot and Java implement asynchronous messaging with RabbitMQ and integrate with PostgreSQL.
• Continuously improve application performance SQL queries and system reliability.
• Ensure reliability observability and maintainability with Grafana Prometheus and other monitoring tools.
• Work closely with DevOps to deploy and run services in Kubernetes.
• Champion testing (JUnit) CI/CD and agile workflows (Scrum/Kanban).
• Solve complex engineering challenges with clean maintainable and well-tested code.

WE WOULD LOVE TO HEAR FROM YOU IF YOU HAVE

Required:

• 6 years of backend development experience.
• Deep knowledge of Java 17 Spring Boot microservices PostgreSQL JPA/Hibernate and SQL optimization.
• Experience with RabbitMQ Kubernetes Docker and monitoring tools like Grafana/Prometheus.
• Strong problem-solving skills and a track record of delivering scalable reliable backend systems.
• Familiarity with Agile practices and CI/CD workflows.

Bonus points if you have:

• Experience with Groovy AWS or designing large-scale distributed systems.
• Contributions to open-source or internal platform projects.
• Exposure to cloud-native infrastructure and advanced observability practices.

Why Youll Love Working Here

• Lead the development of mission-critical backend systems and shape our technical roadmap.
• Solve challenging scalability and performance problems with modern technologies.
• Work with a talented collaborative team in a culture that values ownership technical excellence and innovation.

WHAT WE OFFER

• Attractive compensation package based on experience and skillset
• 30 days of paid annual leave
• Comprehensive private health insurance coverage for your entire family
• Hybrid way of work
• Yoga classes Life Coach Running Coach and Kick-Boxing Sessions
• Cool start-up environment (with swag and much more)

*Harbor Lab is certified as Great Place to Work in Greece and is an equal opportunity employer and prohibits discrimination on the basis of race color religion age sex national origin disability status genetics protected veteran status sexual orientation gender identity or expression or any other characteristic protected by federal state or local laws.

**Harbor Lab collects and processes personal data in accordance with the EU General Data Protection Regulation (GDPR). We are bound to use the information provided within your job application for recruitment purposes only and not to share these with any third parties. We will keep your resume in our database for any future case you want to be deleted from our database you can contact us at

*** If you are applying to this job post then we assume that you have the legal right to work in the EU.

#LI-Hybrid

Required Experience:

Senior IC