Senior Node.js Developer (Poland)

Description: Flosum is a profitable B2B SaaS company focused on Salesforce-native DevSecOps, Data Protection, and Security solutions. Seeking a Senior Node.js Developer to contribute to high-performance backend services and scalable microservices, directly impacting enterprise customers. Requirements: 5+ years of professional Node.js development in production environments. Expert understanding of asynchronous programming, event loops, and the Node.js runtime. Deep experience with TypeScript in production codebases. Strong command of RESTful API design and API security best practices. Proven experience with SQL and NoSQL databases, including query optimization. Proficiency with Git workflows, automated testing, and CI/CD pipelines. Solid understanding of containerization (Docker) and cloud services (AWS/GCP/Azure). Highly preferred: Salesforce development experience, Vue.js front-end development, and familiarity with B2B SaaS compliance requirements. Benefits: Competitive compensation based on experience and impact. Direct collaboration with the founding team and engineering leadership. A stable company with aggressive growth plans and no funding anxiety. Opportunity to work on enterprise-grade products for large organizations. Meaningful technical challenges in security, compliance, and reliability. Culture that rewards ownership and craftsmanship. Remote-first flexibility with a results-oriented work environment.