Java/Kotlin Developer

Key Responsibilities:

• Development: Create and maintain microservices-based backend solutions using modern technologies such as Spring, Java/Kotlin, and Reactor.
• Integration: Work on integrating payment systems with external providers like PayU, P24, and Visa, ensuring seamless communication via REST APIs.
• Database Management: Design and optimize database solutions using MongoDB, CosmosDB, and Elasticsearch, with a focus on MongoDB as the primary engine.
• Infrastructure and Deployment: Build and maintain containerized solutions using Docker and orchestrate deployments with Kubernetes. Manage CI/CD pipelines using GitHub Actions and Azure infrastructure.
• Security: Contribute to the secure handling and storage of payment card data, adhering to PCI DSS standards.

Required Skills:

• Experience with Spring and dependency management tools like Gradle.
• Solid understanding of microservices architecture and cloud platforms, particularly Azure.
• Proficiency in working with REST APIs.
• Familiarity with integration technologies like Hermes (a Kafka wrapper).

Preferred Qualifications:

• Hands-on experience with Azure Spring Apps and other Azure solutions.
• Knowledge of various payment methods, such as cards, BLIK, and pay-by-link, and experience in integrating payment gateways.
• Experience working with external providers (e.g., PayU, P24, Visa).
• Knowledge of PCI DSS standards and secure payment data storage practices.
• Willingness to participate in on-call duties to ensure payment system reliability.

Tools and Technologies:

• Frameworks: Spring, Reactor
• Languages: Java/Kotlin
• Databases: MongoDB, CosmosDB, Elasticsearch
• DevOps: Docker, Kubernetes, GitHub Actions
• API: REST (GraphQL and SOAP are not used)
• Integration Layer: Hermes (internal Kafka wrapper)