Integrations Engineer

Coldrun is a Warsaw-based software engineering company focused on building and evolving software solutions that support real-world operational workflows.We are looking for an experienced Integrations Engineer to join a team developing a SaaS platform that supports complex field logistics operations.The system integrates order management, production control in industrial plants, fleet dispatching, and real-time delivery monitoring.As an Integrations Engineer, you will be responsible for designing, implementing, and maintaining seamless integrations between internal systems, third-party applications, and APIs. This role collaborates closely with Software Engineers, ML Engineers, Product Managers, and other technical teams to ensure efficient data flow across systems and reliable support for operational processes. The ideal candidate has strong problem-solving skills, a deep understanding of integration patterns, and the ability to deliver secure and scalable solutions.Tech StackTypeScript • Python • SQL • REST APIs • NestJS • RabbitMQ / Kafka • AWS / Azure • DockerKey ResponsibilitiesDevelop and maintain integrations between internal systems and external platforms using APIs, event buses, webhooks, and middlewareCollaborate with engineering teams to design integration architectures that meet business requirementsTroubleshoot and resolve integration issues while ensuring minimal downtime and data consistencyImplement best practices for API management, authentication, and securityMonitor integration performance and optimize solutions for scalability and reliabilityDocument integration workflows, technical specifications, and operational proceduresWork with Product Managers to understand integration needs and deliver solutions aligned with product roadmapsSupport data synchronization and transformation across multiple systemsRequirementsVery good knowledge of Node.js, Python and SQL (knowledge of additional languages is a plus)Experience with NestJSExperience with event-driven architectures and message queues (e.g., Kafka, RabbitMQ)Practical experience with Domain-Driven Design (DDD) and Clean ArchitectureSolid understanding of authentication protocols (OAuth, SAML) and security best practicesFamiliarity with cloud services (AWS, Azure, or GCP) and their integration toolsVery good knowledge of GitBachelor’s degree in Computer Science, Information Systems, or a related fieldExcellent troubleshooting and problem-solving skillsVery good English proficiencyNice to HaveExperience building enterprise systems such as ERP, CRM, or HRISExperience with MSSQL in the context of integrations with external databasesFamiliarity with CI/CD pipelines and DevOps practicesExperience working with monorepos, Trunk-Based Development (TBD), semantic versioning, and the Conventional Commits standardWhat We OfferWork with a modern technology stackReal influence on system architecture and technical decisionsRemote or hybrid work option (Warsaw)Flexible working hoursPrivate healthcareSports and recreation packageTeam meetings and integration eventsWork in an international environment