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.
RequirementsCore 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
