Senior Back End Engineer (Java)

Senior Back End Engineer (Java) - Techsurge Private Limited | Career Page

Senior Back End Engineer (Java)

Karachi, Pakistan

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Job Openings Senior Back End Engineer (Java)

About the job 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
• 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

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