Mid-Senior Software Engineer - Payment Processing Systems

About the Role

We're hiring a Mid-Senior Software Engineer to join our remote team at Aurora Payments. As a Software Engineer specializing in payment processing systems, you will play a crucial role in architecting and building solutions that empower thousands of businesses. This position offers the opportunity to work on cutting-edge technologies and contribute to a platform that processes over $12 billion annually.

What You'll Do

• Build scalable payment processing systems using .NET/C# that handle high-volume, mission-critical transactions.
• Design and implement CQRS (Command Query Responsibility Segregation) patterns for event-driven payment workflows and real-time data synchronization.
• Develop and maintain payment processor integrations with major payment processors.
• Build robust RESTful APIs and event-driven microservices that power our payment solutions for ISVs and software platforms.
• Integrate AI/ML capabilities into payment systems for fraud detection, risk assessment, transaction optimization, and intelligent routing.
• Work on real-time transaction processing with a focus on reliability, security, performance, and data consistency.
• Implement PCI-compliant systems ensuring the highest standards of data security and regulatory compliance.
• Troubleshoot and resolve technical issues in production payment systems at scale.

Requirements

• 3-5+ years of professional software development experience with .NET/C# in production environments.
• Fintech or payments industry experience, with deep knowledge of payment processor integrations (Stripe, Fiserv, First Data, Worldpay, TSYS, etc.).
• Experience implementing CQRS (Command Query Responsibility Segregation) and event sourcing patterns in production systems.
• Hands-on experience with Google Cloud Platform (GCP).
• Experience working with modern AI/ML technologies such as integrating AI models, working with LLMs, implementing AI-powered features, or collaborating with data science teams.
• An understanding of payment processing workflows including authorization, capture, settlement, refunds, chargebacks, and reconciliation is a plus but not required.
• Experience in designing and building RESTful APIs and event-driven microservices for high-traffic, low-latency systems.
• Basic knowledge of PCI-DSS compliance and secure payment data handling, tokenization, and encryption is a plus but not required.
• Problem-solving skills with the ability to debug complex distributed payment systems.

Nice to Have

• Experience with CockroachDB and Postgres or other distributed SQL databases for globally distributed, resilient data storage.
• ASP.NET Core and SignalR experience for building real-time web applications and payment notifications.
• Background in fraud detection systems or risk management platforms is a plus but not required.
• Knowledge of network tokenization, 3DS authentication, or Level 2/3 card processing is a plus but not required.
• Experience with observability tools (Datadog, New Relic, Google Cloud Monitoring).
• Understanding of OAuth 2.0, OpenID Connect, and API security best practices.

What We Offer

• Competitive salary and benefits package.
• Fully remote work with flexible hours.
• Opportunity to work with a leading fintech company.
• Access to cutting-edge technologies and tools.
• Collaborative and innovative work environment.