API Backend Engineer (.NET Core) at Stretchit Concept Limited

Role Overview

We are looking for an experienced API Backend Engineer with strong skills in .NET Core to design and develop the backend services and APIs for a Core Banking API Engine.

You will build secure and reliable microservices, integrate with core banking systems, and ensure high performance to support mission-critical financial operations.

Key Responsibilities

API Development

• Design, develop, and maintain RESTful APIs and microservices using .NET Core (C#)
• Implement business logic for core banking features: account management, payments, loans, treasury, and compliance
• Define and enforce API standards (OpenAPI/Swagger, JSON, gRPC)
• Build scalable backend services that support high transaction volumes and low-latency operations
• Integrate APIs with core banking systems

Backend Engineering

• Work with SQL Server, PostgreSQL, and NoSQL databases to ensure efficient data modeling and transactions
• Implement caching, queuing, and asynchronous processing for performance optimization
• Ensure fault tolerance, resilience, and backward compatibility of APIs
• Collaborate with architects to evolve a microservices-based architecture

Security & Compliance

• Apply secure coding practices and adhere to OWASP API Security Top 10
• Implement authentication and authorization using OAuth2, OpenID Connect, and JWT
• Support compliance with PCI-DSS, GDPR, ISO 27001, and banking regulations

Collaboration & Process

• Work with frontend and mobile engineers to expose banking features via APIs
• Collaborate with DevOps engineers on CI/CD pipelines and containerized deployments
• Participate in Agile ceremonies, sprint planning, and technical reviews
• Write and maintain API documentation for internal and external developers

Requirements

• Bachelor's Degree in Computer Science, Software Engineering, or related field