Senior C# Developer for Real-Time Payment Engine

Tricefal; France; Remote; EUR 65,000 - 90,000; Full time

Job summary

Tricefal is seeking a highly skilled C# Developer to join our team and help build a complex payment processing engine based on event-driven architecture. You will work on mission-critical systems handling real-time financial transactions with emphasis on reliability, scalability, and security.

You will design and implement components with C# and .NET Core, integrate with external gateways, and contribute to code quality through testing, reviews, and CI/CD.

Qualifications

• 5+ years of experience with C#/NET Core.
• Strong understanding of event-driven architecture and message-based systems.
• Experience with microservices and RESTful APIs.
• Relational databases (PostgreSQL) knowledge; NoSQL is a plus.
• Familiarity with payment systems or transaction processing is advantageous.
• Proficiency in unit testing, CI/CD pipelines, and Git.

Responsibilities

• Design, develop, and maintain components of our payment processing engine using C# and .NET Core.
• Implement and optimize event-driven architecture patterns (pub/sub, message queues).
• Collaborate with architects and product teams to ensure system scalability and fault tolerance.
• Integrate with external payment gateways, banking APIs, and internal services.
• Write clean, maintainable, and well-documented code following best practices.
• Perform code reviews, unit testing, and participate in continuous integration and deployment processes.
• Troubleshoot and resolve complex technical issues in production environments.
• Contribute to performance tuning and system optimization for high throughput and low latency.

Skills

C# / .NET Core

Event-driven architecture

Asynchronous programming

Message-based systems

Microservices

RESTful APIs

Unit testing

CI/CD pipelines

Git

Pub/Sub

RabbitMQ

Kafka

Azure Service Bus

Tools

RabbitMQ

Kafka

Azure Service Bus

Job description

Tricefal is seeking a highly skilled C# Developer to join our team and help build a complex payment processing engine based on event-driven architecture. You will work on mission-critical systems handling real-time financial transactions with emphasis on reliability, scalability, and security.

You will design and implement components with C# and .NET Core, integrate with external gateways, and contribute to code quality through testing, reviews, and CI/CD.