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Wellfit

Senior Software Engineer, Payments

Wellfit

. Design, develop, and maintain backend services with a focus on .NET and Azure cloud environments.

Posted 4/20/2026full-timeIrving • Texas • 🇺🇸 United StatesSenior💰 $130,000 - $150,000 per yearWebsite

Tech Stack

Tools & technologies
AzureCloudDistributed SystemsiOSMicroservices.NET

About the role

Key responsibilities & impact
  • Design, develop, and maintain backend services with a focus on .NET and Azure cloud environments.
  • Contribute to payment-related initiatives, including:
  • ◦Expanding ACH features for practices and recurring billing.
  • ◦Enhancing card payments with authorization, capture, and settlement.
  • ◦Supporting device-based payments (e.g., Tap to Pay for iOS).
  • ◦Exploring modernized payment methods (e.g., network tokens, bank verification).
  • Drive secure coding practices, ensuring sensitive financial data is handled and logged properly.
  • Participate in breaking down and modernizing microservices for improved scalability and throughput.
  • Collaborate with architects, engineers, and product stakeholders to align solutions with business needs.
  • Contribute to resolving technical debt and building resilient systems to support increased transaction volume.

Requirements

What you’ll need
  • Bachelor’s degree in Computer Science, Engineering, or related field.
  • 4+ years of professional software engineering experience.
  • Proficiency in .NET backend development.
  • Experience with cloud development (Azure preferred).
  • Demonstrated ability to integrate external APIs and services.
  • Strong understanding of secure coding principles and compliance requirements for handling sensitive data.
  • Payments industry experience (ACH, card processing, settlement, Worldpay integration, etc.) preferred.
  • Exposure to microservices architecture and distributed systems preferred.
  • Experience with scaling throughput in payment transaction systems preferred.
  • Familiarity with modern payment methods (Apple Pay, Google Pay, network tokens) preferred.

Benefits

Comp & perks
  • Competitive salary range: $130,000 – $150,000+, depending on experience and payments expertise.
  • Comprehensive benefits package [insert details if available].
  • Opportunities for professional growth and cross-team collaboration.

ATS Keywords

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Hard Skills & Tools
.NETAzurebackend developmentAPI integrationsecure codingmicroservices architecturedistributed systemspayment transaction systemsACHcard processing
Soft Skills
collaborationproblem-solvingcommunication
Certifications
Bachelor’s degree in Computer ScienceBachelor’s degree in Engineering