Senior Backend Developer (.NET) OneRails Technology Hub - Poland

OneRail is a technology company innovating solutions for multi-modal delivery. We have built and continue to develop a delivery orchestration platform that connects shippers to an extensive courier ecosystem to automate, optimize, and control the entire delivery supply chain, from the demand signal to the proof of delivery. 

Our OmniPoint SaaS platform uses proprietary algorithms and artificial intelligence to power efficient same-day delivery programs for major companies like Lowe’s, Pepsi, American Tire Distributors, and Advance Auto Parts.

As Senior Backend Developer (.NET), you join a team of talented engineers and developers working together to transform final mile logistics and supply chain operations.  Your role will be managing the interchange of data between OneRail and 3rd party services, as well as interacting with data stores, and exchanging information between internal microservices.

Key Responsibilities:

• Develop, optimize, and maintain backend services and APIs that power our 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 our platform.

• 6+ years of experience in backend development, with a strong focus on .NET using C#. Experience with Node.js development as 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 (e.g., 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+).

• Innovation at its Core: Work on industry-leading technology that is shaping the future of logistics.
• Career Growth: Opportunities for professional development and career advancement.
• Collaborative Culture: Join a team of talented engineers and industry experts.
• Exciting Challenges: Solve complex problems and contribute to impactful projects.
• Flexibility: We offer a flexible hybrid work style and flexible employment types to suit your needs, ensuring a work-life balance that works for you.
• Competitive Compensation: Attractive salary and benefits package.

About OneRail



OneRail is a leading omnichannel fulfillment solution pairing best-in-class software with logistics as a service to provide dependability and speed to help businesses meet their delivery promise. With a real-time connected network of 12 million drivers, OneRail matches the right vehicle for the right delivery so brands lower expenses and increase capacity to rapidly scale their businesses. This people-plus-platform approach features a 24/7 USA-based exceptions team who maintain a 98% on-time delivery rate. By optimizing fulfillment processes, reducing costs and improving order accuracy with store-shelf-to-doorstep visibility, OneRail is committed to empowering clients and improving the customer experience.

OneRail was named to the Deloitte Technology Fast 500™ two years in a row, was ranked 19th in the 2025 FreightTech 25, named for the fifth year in a row to the FreightTech 100, was honored as one of Inc. magazine’s Best Workplaces 2023, was listed on Forbes’ lists of America’s Best Startup Employers for the last three years, was named to the Inc. 5000 two years in a row and was selected as the Last Mile Company of the Year for the 2024 SupplyTech Breakthrough Awards. To learn more about OneRail, visit OneRail.com.