Job Title: Senior C# Developer Payment Systems Integration
Type of Contract: Full-Time
Salary Range: Premium USD Compensation (with performance bonuses)
Language Requirements: Excellent English proficiency (written and spoken) REQUIRED
We are seeking a skilled Senior C# Developer with strong .NET Core expertise to join our team for a high-impact payment systems integration project. You will be responsible for building and maintaining secure, scalable payment processing solutions that integrate with 250+ global processors. Your work will directly support major hospitality and retail clients, ensuring seamless and compliant transactions at scale.
Key Responsibilities
Develop microservices using C# and .NET Core 8.0 within Linux Docker containers
Integrate payment gateways including Stripe, Global Payments, Freedom Pay, and others
Implement PCI-compliant iframe solutions for secure payment capture
Build and maintain robust RESTful APIs for payment processing
Develop React.js (TypeScript) components for frontend payment interfaces
Optimize performance for high-volume transaction systems
Assist with .NET Core upgrades and modernization initiatives
Ensure secure transaction storage and database integration with Azure SQL
Must-Have Qualifications
5+ years of professional C# development experience with .NET Core/.NET Framework
3+ years working with payment systems, fintech, or transaction-heavy platforms
Strong experience integrating third-party APIs at scale
Background in hospitality or retail payment solutions is highly desirable
Hands-on experience with microservices architecture and Docker (Linux containers)
Familiarity with cloud platforms (Azure preferred; AWS a plus)
Proven ability to design and implement PCI-compliant, secure payment solutions
Preferred Qualifications
Experience with multi-tenant SaaS platforms
Previous migration experience from .NET Core 2.2 to 8.0
Knowledge of React.js with TypeScript and server-side rendering
Exposure to monitoring tools such as Datadog and Sentry.io
Competitive USD compensation with performance-based bonuses
Fully remote work with flexible hours and generous time off
Annual learning budget for certifications, conferences, and training
Direct collaboration with Fortune 500 clients and growing SMBs
Annual company retreat and regular team-building events
Support for open-source contributions and speaking engagements
Transparent compensation structure with clear career progression
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