HE - Sr. Backend Developer - New API pods - Job8332

Summary

We are seeking a skilled Senior Backend Developer to lead the modernization of our legacy SOAP/WCF APIs to modern REST-based services. This role involves architecting and developing scalable .NET Core solutions while maintaining backward compatibility with existing systems.

Responsibilities

• API Modernization & Development

Lead the migration of legacy SOAP and WCF services to REST APIs using .NET Core

Design and implement REST adapter layers to translate between modern REST endpoints and legacy WCF/SOAP services

Develop comprehensive OpenAPI specifications for all new REST services

Build robust file-based interface translation mechanisms

Ensure seamless integration with existing Supply Chain Management (SCM) systems

Team Lead Qualities

Experience leading development teams. Ideally, API projects.

Team-oriented with a team perspective - able to supervise other developer’s work, help who is struggling and escalate issues when needed.

Work on administrative tasks, such as documentation.

Architecture & Design

Architect scalable microservices using .NET Core and RESTful principles

Design and implement authentication and authorization using OAuth 2.0 and MFA

Build secure access token propagation mechanisms across services

Create adapter patterns to bridge modern REST clients with legacy backend systems

Establish clear API versioning and deprecation strategies

Integration & Collaboration

Coordinate with Presidio IVR systems for seamless integration

Work closely with internal teams already familiar with OAuth implementations

Support integration testing efforts across multiple system boundaries

Collaborate with DevOps team for smooth CI/CD pipeline integration security posture.

Requirements

Core Technologies

7+ years of experience with C# and .NET Framework/.NET Core

Strong expertise in RESTful API design and implementation

Deep understanding of SOAP and WCF services architecture

Experience with OpenAPI/Swagger specification development

Proficiency in Entity Framework Core or similar ORM technologies

Security & Authentication

Hands-on experience with OAuth 2.0 and OpenID Connect

Implementation of Multi-Factor Authentication (MFA) systems

Knowledge of JWT tokens and secure token propagation

Understanding of API security best practices and transit security

System Integration

Experience with legacy system modernization projects

Knowledge of adapter pattern implementation

File-based interface development and translation

IVR system integration experience (Presidio preferred)

Understanding of enterprise integration patterns

Preferred Qualifications

Bachelor's degree in Computer Science or related field

Experience with cloud platforms (Azure)

Knowledge of containerization technologies (Docker, Kubernetes)

Familiarity with message queuing systems (RabbitMQ, Azure Service Bus)

Experience with API gateway solutions

Experience with Finance