DNA Core API Integration SME Developer

DNA EXP IS MANDATORY DNA Core API Integration SME Developer Location: Redmond, WA (Remote) Client: Mastercard Rate - $50-52 (max )W2 Travel: Occasional client travel (approximately once per month or every other month; expenses covered)

Job Description

We are seeking a DNA Core API Integration SME Developer to support a large-scale pricing and product management transformation initiative for a leading global payments organization. This role will focus on understanding and integrating with the client's DNA platform Core APIs while building and supporting secure, scalable backend services.

Responsibilities

Serve as the subject matter expert for DNA Core APIs and related platform integrations. Design, develop, and maintain RESTful APIs using .NET technologies. Analyze API specifications and integration requirements. Support system integration between pricing, product catalog, and downstream applications. Troubleshoot and resolve API performance and connectivity issues. Collaborate with business analysts, architects, and development teams to ensure successful solution delivery. Participate in design reviews, testing, and deployment activities. Document technical designs, integration patterns, and support procedures. Required Qualifications 5+ years of software development experience. Strong expertise in C#, ASP.NET Core, and REST API development. Experience integrating enterprise platforms through APIs and microservices. Understanding of authentication protocols including OAuth 2.0 and JWT. Experience with Azure cloud services. Strong debugging and troubleshooting skills. Experience working within Agile delivery teams.

Preferred Qualifications

Previous experience with Fiserv DNA platform or comparable core banking/payment systems. Experience in financial services, banking, or payments organizations. Familiarity with Azure DevOps and CI/CD pipelines.