Senior Java Backend Engineer developing backend services for digital payments and transactional systems at Expleo. Contributing to scalable architectures and ensuring operational stability.
Responsibilities
Design, develop, and maintain backend services in Java.
Build and enhance REST APIs and microservices used in transaction-oriented systems.
Contribute to scalable and resilient architectures for high-volume applications.
Work on integrations with internal platforms, external partners, and financial service ecosystems.
Ensure code quality through testing, peer reviews, static analysis, and CI/CD practices.
Improve production readiness, observability, and operational stability.
Collaborate with cross-functional teams in an Agile / Scrum environment.
Apply secure engineering practices in business-critical and regulated systems.
Requirements
More than 5 years of experience in backend software engineering
Strong hands-on experience with Java
Solid experience with Spring / Spring Boot, JEE, and REST services
Good knowledge of microservices architecture
Experience with JPA / Hibernate
Good understanding of Oracle or PostgreSQL
Experience with Git, CI/CD, and code quality tools such as SonarQube
Familiarity with Docker
Exposure to runtime environments such as JBoss, Tomcat, or similar
Good understanding of secure development principles
Previous experience in payments, banking, fintech, or other transaction-heavy regulated environments
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