Backend Engineer

Responsibilities

• Design and implement backend services for payment processing, invoicing, reconciliation, and smart financial reporting
• Build robust, auditable data pipelines that ensure accuracy and traceability across all financial operations
• Develop and maintain integrations with payment gateways, banking APIs, and financial data providers
• Enforce data integrity standards and implement patterns for idempotency, retry logic, and failure handling in financial flows
• Collaborate with compliance and product teams to translate regulatory requirements into technical implementation
• Contribute to fraud detection logic, rate limiting, and access control mechanisms that protect financial operations
• Own incidents end-to-end — investigate, resolve, and drive post-mortems to improve system reliability

Requirements

• 5-7+ years of backend engineering experience
• Meaningful exposure to FinTech, payments, or financial data systems
• Strong proficiency in Java (Spring Boot)
• Deep understanding of transactional systems and data consistency
• Solid experience with PostgreSQL, including schema design and query optimization
• Experience integrating with payment processors (Stripe, Adyen, or similar) or open banking APIs

Benefits

• Real ownership from day one
• Learn from senior operators
• Competitive compensation including base salary and performance-based bonus
• Personal growth and early leadership potential
• Vibrant company culture with modern Berlin office and team events

About the Company

A11 is a next-generation supply chain platform that leverages agentic AI and workflow automation to redefine how global industries source, distribute, and finance materials.