Job Title: Senior C# Developer Payment Systems IntegrationLocation: Remote Latin America PreferredType of Contract: Full-TimeSalary Range: Premium USD Compensation (with performance bonuses)Language Requirements: Excellent English proficiency (written and spoken) REQUIREDWe 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 ResponsibilitiesDevelop microservices using C# and .NET Core 8.0 within Linux Docker containersIntegrate payment gateways including Stripe, Global Payments, Freedom Pay, and othersImplement PCI-compliant iframe solutions for secure payment captureBuild and maintain robust RESTful APIs for payment processingDevelop (TypeScript) components for frontend payment interfacesOptimize performance for high-volume transaction systemsAssist with .NET Core upgrades and modernization initiativesEnsure secure transaction storage and database integration with Azure SQLMust-Have Qualifications5+ years of professional C# development experience with .NET Core/.NET Framework3+ years working with payment systems, fintech, or transaction-heavy platformsStrong experience integrating third-party APIs at scaleBackground in hospitality or retail payment solutions is highly desirableHands-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 solutionsPreferred QualificationsExperience with multi-tenant SaaS platformsPrevious migration experience from .NET Core 2.2 to 8.0Knowledge of with TypeScript and server-side renderingExposure to monitoring tools such as Datadog and Benefits & PerksCompetitive USD compensation with performance-based bonusesFully remote work with flexible hours and generous time offAnnual learning budget for certifications, conferences, and trainingDirect collaboration with Fortune 500 clients and growing SMBsAnnual company retreat and regular team-building eventsSupport for open-source contributions and speaking engagementsTransparent compensation structure with clear career progression