Senior Backend Engineer (JVM)

Technologies we use

About the project

Your responsibilities

• Implement the integration in Java or Kotlin by translating our unified internal API to the external PSP interface, applying an adapter-style design
• Develop and validate complete payment flows for Credit Card and BECS Direct Debit, covering tokenization, payment execution, refunds, and chargeback processing
• Quickly familiarize yourself with and operate within the established PSP Integration Architecture, ensuring high-quality, scalable, and testable code consistent with the Spring Boot/Spring Cloud microservice environment
• Maintain thorough specifications and documentation for all integration work using the GitHub Spec-Kit methodology
• Collaborate closely within a compact, focused micro-team and participate in daily remote check-ins via Slack and Google Meet

Our requirements

• 4+ years of backend development with Java and Kotlin, including extensive use of Spring Boot and Spring Cloud for distributed microservices
• Solid FinTech/Payments background with knowledge of the full payment lifecycle (authorization, capture, refund, chargeback) and hands-on experience integrating external PSPs
• Proficiency in PostgreSQL, ideally AWS Aurora, and in asynchronous messaging using RabbitMQ/CloudAMQP
• Comfortable working in containerized Kubernetes environments, specifically AWS EKS
• Experience with GitHub Spec-Kit is highly valued
• English (B2-C1)

Optional

• Hands-on experience with UK BACS Direct Debit
• Hands-on experience with Instant Bank Pay (IBP)
• GoCardless Success+

This is how we organize our work

Team size

This is how we work

Team members

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What we offer

• Private medical healthcare
• 50% Multisport card
• Remote work