Senior Backend .NET Developer

OneRail Poland is a company working on industry-leading technology shaping the future of logistics. The office is located in Kraków, Poland. The company offers a flexible hybrid work style and flexible employment types.

• 6+ years of experience in backend development with a strong focus on .NET using C#.
• Experience with Node.js development is a plus.
• Experience in building RESTful APIs and microservices.
• Experience with databases such as MySQL, MongoDB, CosmosDB or similar.
• Understanding of cloud services (Azure and GCP) and containerization (Docker, Kubernetes).
• Experience with Agile methodologies and CI/CD practices.
• Familiarity with message queues (RabbitMQ, Kafka) is a plus.
• Strong problem-solving skills and ability to work in a fast-paced environment.
• Excellent communication and collaboration skills.
• Advanced proficiency in English, both written and spoken (B2+).

• Develop, optimize, and maintain backend services and APIs that power the logistics platform and fintech product.
• Design and implement scalable and high-performance solutions using C#/.NET and other modern backend technologies.
• Implement best practices for security, scalability, and performance optimization.
• Participate in code reviews, testing, and debugging to ensure high code quality and reliability.
• Monitor system performance, troubleshoot issues, and proactively optimize processes.
• Collaborate with frontend developers, product managers, and other stakeholders.
• Document technical specifications and architectural decisions for future reference.
• Assist in automating deployment processes and improving CI/CD pipelines.
• Stay updated with industry trends and emerging technologies to continuously improve the platform.