Customer Integration Specialist

OneRail Poland Sp. z o.o. operates in the logistics industry, developing SaaS enterprise software focusing on integration solutions that connect customer systems with the OneRail platform.

• Bachelor's degree in Computer Science, Information Systems, Engineering, or equivalent experience.
• 2–5 years of experience implementing SaaS software or enterprise integrations.
• Experience working with REST APIs.
• Familiarity with JSON, XML, CSV, and data transformation.
• SQL knowledge for data validation.
• Understanding authentication methods such as OAuth and API Keys.
• Experience with Postman or similar API testing tools.
• Familiarity with middleware/iPaaS platforms (e.g. MuleSoft, Boomi).
• Ability to manage multiple implementation projects simultaneously.
• Experience in logistics, transportation, supply chain, or retail technology.
• Understanding webhooks and event-driven architecture.
• Experience working in a customer-facing SaaS environment.
• Strong troubleshooting and analytical skills.
• Advanced proficiency in English and Polish (B2+).

• Design, configure, and implement customer integrations using APIs, webhooks, SFTP, EDI, and flat-file exchanges.
• Lead technical discovery sessions to understand customer system architecture and business workflows.
• Configure integration mappings, authentication methods (OAuth, API Keys), and data transformations.
• Validate end-to-end data flow prior to production launch.
• Partner with Implementation Managers to develop technical implementation plans.
• Build and execute integration test plans using tools like Postman.
• Troubleshoot API connectivity, data validation, and workflow issues.
• Document technical configurations and implementation decisions.
• Create detailed process and integration flows of customer infrastructures.
• Ensure integrations meet security and performance requirements.
• Serve as the technical liaison between Customer Success, Product, Engineering, and customers.
• Escalate product defects and enhancement requests with clear technical documentation.
• Collaborate with Engineering during complex implementations requiring custom development.
• Assist Support with complex post-go-live integration issues.
• Develop reusable integration templates and documentation.
• Improve implementation processes through automation and standardization.
• Create internal knowledge base articles and customer-facing technical guides.
• Identify opportunities to reduce implementation timelines through repeatable solutions.