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Engineering

C# .NET Core Developer - Payment Systems Integration

Build and maintain payment processing solutions for major hospitality and retail clients including Fanatics.

Remote - Latin America Only
Remote OK
Full-time
Employment
August 21, 2025
Posted
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Job Description

About the Role

We are seeking experienced C# developers with strong .NET Core expertise to join our team for a critical payment systems integration project. This role involves building and maintaining payment processing solutions that handle tokenization, detokenization, and integration with 250+ payment processors. You'll be working on a platform that processes transactions for major hospitality and retail clients including Fanatics.

Technical Development

  • Payment Processing Microservices: Develop using C# and .NET Core 8.0 on Linux Docker containers
  • Payment Gateway Integrations: Build and maintain integrations with Stripe, Global Payments, Freedom Pay, and 250+ other processors
  • Secure iframe Solutions: Implement PCI-compliant payment capture systems
  • Mapping Services: Create seamless integration between various payment gateway APIs
  • Full-Stack Development: Build both backend detokenization services and frontend payment routing solutions

Integration & Architecture

  • RESTful APIs: Design and implement robust payment processing APIs
  • React Frontend: Build payment forms and secure iframe management components
  • Database Integration: Work with Azure SQL databases for secure transaction storage
  • Server-Side Rendering: Implement SSR for iframe management in React applications
  • Legacy System Support: Create emulation layers for systems like Willpay Express

DevOps & Deployment

  • Containerization: Deploy applications using Docker containers in Azure environment
  • CI/CD: Set up and maintain deployment pipelines using GitHub Actions
  • Monitoring: Configure application monitoring using Datadog and Sentry.io
  • Environment Management: Manage staging and production environments
  • Linux Optimization: Ensure applications run efficiently in containerized Linux environments

Technical Stack

Primary Technologies

  • Language: C# (.NET Core 8.0 LTS)
  • Backend: .NET Core 8.0 (migration experience from 2.2 to 8.0 is a plus)
  • Frontend: React.js with TypeScript (server-side rendering experience)
  • Database: Azure SQL Server

Infrastructure & Tools

  • Containerization: Docker (Linux containers)
  • Cloud Platform: Azure (App Services, SQL Database) - AWS knowledge is a plus
  • Version Control: Git/GitHub
  • Monitoring: Datadog, Sentry.io
  • Payment Processors: Stripe, Global Payments, Freedom Pay, and 250+ others

Key Responsibilities

  • Microservices Development: Build payment processing services using modern .NET Core architecture
  • Payment Integration: Integrate with major payment processors and gateways
  • Security Implementation: Ensure PCI compliance and secure payment handling
  • API Development: Create robust, scalable payment processing APIs
  • Frontend Development: Build React components for payment interfaces
  • Performance Optimization: Optimize for high-volume transaction processing
  • System Migration: Assist with .NET Core upgrades and modernization

What You'll Love About This Role

  • Work on critical payment infrastructure serving major retail and hospitality clients
  • Collaborate with a team of experienced payment systems developers
  • Opportunity to work with cutting-edge fintech technologies
  • Direct impact on transaction processing for millions of users
  • Competitive compensation with remote flexibility
  • Exposure to complex, high-scale payment processing challenges
Requirements
  • Excellent English proficiency (written and spoken) - REQUIRED
  • 5+ years of C# development experience with .NET Core/.NET Framework
  • 3+ years working with payment systems or fintech
  • Experience with hospitality or retail payment solutions
  • Previous work with multi-tenant SaaS platforms
  • Experience integrating with 3rd party APIs at scale
  • Develop payment processing microservices using C# and .NET Core 8.0
  • Build and maintain payment gateway integrations (Stripe, Global Payments, etc.)
  • Implement secure iframe solutions for PCI-compliant payment capture
Benefits & Perks
  • Premium USD compensation with performance bonuses
  • Full remote work with flexible hours and generous time off
  • Annual learning budget for AWS certifications, conferences, and courses
  • Direct client interaction with Fortune 500 companies and growing SMBs with clear career progression
  • Annual company retreat and regular virtual team building events
  • Open-source contribution time and speaking opportunity support
  • Transparent communication with open compensation bands and regular feedback
Ready to Apply?
Join our team and help build the future of cloud infrastructure.
Apply Now

Application deadline: August 31, 2025