Customer Integration Specialist

• 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 (MuleSoft, Boomi, etc.).
• Ability to manage multiple implementation projects simultaneously.
• Experience with 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 & Polish, both written and spoken (B2+).

The Integration Specialist is responsible for designing, configuring, testing, and supporting customer integrations during the implementation lifecycle. This role serves as the technical bridge between customers, Implementation Managers, Product, and Engineering to ensure seamless connectivity between customer systems and the OneRail platform.

The ideal candidate is highly technical, customer-focused, and enjoys solving integration challenges while working in a fast-paced SaaS environment.

Why Join OneRail Poland?

• 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.

Take the next step in your career and become a part of OneRail’s exciting journey!

,[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, 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., Troubleshoot API connectivity, data validation, and workflow issues., Document technical configurations and implementation decisions., Create extensive and detailed process and integration flows of customers' existing infrastructure and how it will connect to OneRail., 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 when necessary., 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.] Requirements: REST API, API testing, SQL, JSON, Postman, SaaS, Enterprise software Additionally: Sport subscription, Training budget, Private healthcare, International projects, Small teams, Free coffee, Bike parking, Playroom, Free snacks, Free beverages, Free lunch, Free parking, In-house trainings, In-house hack days, Modern office, Startup atmosphere, No dress code.