Senior C# Developer

About the RoleWe are seeking a Senior C# Developer with deep expertise in .NET Core to join our team for a high-impact payment systems integration project. You will design, build, and maintain secure, scalable payment processing solutions that connect to over 250+ global processors.Your work will directly support hospitality and retail clients worldwide, ensuring seamless, compliant, and high-volume transactions at scale.Key ResponsibilitiesDevelop microservices with C# and .NET Core 8.0 in 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 RESTful APIs for payment processing.Develop React.js (TypeScript) components for frontend payment experiences.Optimize performance for high-volume transaction systems.Assist with .NET Core upgrades and modernization (e.g., 2.2 → 8.0).Ensure secure transaction storage and database integration with Azure SQL.Must-Have Qualifications✔ 5+ years of professional C# development with .NET Core/.NET Framework.✔ 3+ years working with payment systems, fintech, or transaction-heavy platforms.✔ Proven experience integrating third-party APIs at scale.✔ Hands-on experience with microservices and Docker (Linux containers).✔ Strong knowledge of cloud platforms (Azure preferred; AWS a plus).✔ Ability to design and implement PCI-compliant, secure payment solutions.✔ Background in hospitality or retail payment solutions (highly desirable).Preferred Qualifications⭐ Experience with multi-tenant SaaS platforms.⭐ Prior migration work from .NET Core 2.2 → 8.0.⭐ Knowledge of React.js with TypeScript and SSR.⭐ Exposure to monitoring tools such as Datadog and Sentry.io.Benefits & Perks💲 Premium USD compensation + performance-based bonuses.🌎 Fully remote with flexible hours & generous time off.📚 Annual learning budget for certifications, training, and conferences.🏢 Direct collaboration with Fortune 500 clients and high-growth SMBs.✈ Annual company retreat + regular team-building events.💡 Support for open-source contributions and speaking engagements.📈 Transparent compensation structure with clear career progression.