Senior Java Developer, FinTech e-Payments

ManpowerGroup Greece

full-time

Posted on: 9/19/2025

Origin: • 🇬🇷 Greece

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Senior

AWSCloudJavaKafkaPostgresSpringSpring BootSpringBoot

About the role

Design, develop, and maintain robust backend services using Java and Spring Boot
Build and optimize RESTful APIs and manage PostgreSQL databases
Deploy applications on AWS to ensure performance, scalability, and reliability
Lead engineering efforts on system design, architecture, and scalability
Build and manage long-running synchronous/asynchronous workflows (decoupling, batching, async)
Ensure fault tolerance, data consistency, and concurrency handling in distributed environments
Apply messaging patterns with Kafka and implement idempotent consumers, retries, and event processing
Design and maintain resilient REST APIs that persist state and recover from failures
Implement database transactions, ACID principles, and multiple isolation levels with PostgreSQL
Utilize modern Java concurrency tools including virtual threads and traditional threads
Collaborate cross-functionally with product managers and other engineering teams
Contribute to documentation and knowledge sharing
Report to the CTO and participate in architectural discussions

BSc/MSc in Computer Science, Software Engineering, or a related field
6+ years of professional software development experience in Java
Strong proficiency in Java 20+, Spring Boot, REST APIs
Deep understanding of backend architecture patterns, including hexagonal architecture
Expertise in messaging systems (Kafka, queues, topics)
knowledge with AWS cloud services
Solid knowledge of PostgreSQL and database design
Strong grasp of concurrency, data consistency, and fault tolerance
Familiarity with GitHub Actions for CI/CD
Experience with managing and processing data
Oral communication and interpersonal skills
Highly organized with strong time-management and prioritization skills
Flexibility and ability to multitask and pivot between priorities
Excellent command of the Greek and English language
Must be based in Greece and holder of a valid EU Work Permit