Senior Back End Engineer (Java)

Key Responsibilities

• API & Microservices Orchestration
  • Design and build Java-based microservices that securely mediate between Bank's core banking engine and the external partner ecosystem.
  • Implement resilient, scalable APIs with clear service boundaries and observability.
• Fintech Product Logic
  • Develop proprietary fintech logic for Beyond Banking transactions, including travel bookings, eSIM provisioning, and E‑commerce and marketplace purchases.
  • Ensure tight linkage with core systems such as digital accounts, payments, loyalty, and settlement layers.
• Third‑Party Integrations
  • Architect secure, high‑availability integrations with super‑app orchestrators, travel platforms, fintech aggregators, and service providers.
  • Handle failures, retries, and service degradation gracefully.
• Security & Data Protection
  • Implement advanced authentication and authorization using OAuth2, OpenID Connect, and token-based security models.
  • Protect sensitive customer data across all third‑party interactions.
• Transactional Integrity
  • Ensure full ACID compliance across all Beyond Banking transactions.
  • Handle complex edge cases such as partial fulfillment, refunds, reversals, and reconciliation between financial and non‑financial systems.
• Platform & Engineering Principles
  • Bank-grade reliability: No compromise on correctness or integrity.
  • Scalable integration: One platform, many partners.
  • Security-by-default: Zero‑trust partner interactions.
  • Observability & resilience: Designed for failure, built for recovery.

Required Skills & Experience

• 7–10 years backend experience, with strong Java and microservices expertise.
• Experience working on payments, transactional systems, or fintech platforms.
• Strong understanding of distributed systems, databases, and consistency models.
• Experience integrating with third‑party service providers.
• Strong engineering rigor and ownership mindset.