Senior Node.js Developer (Serbia)

About the role

Flosum is a bootstrapped, profitable B2B SaaS company building a Salesforce-native DevSecOps, data protection and security platform trusted by Fortune 500 enterprises in financial services, healthcare, government and insurance. It is now in an aggressive growth phase and needs senior Node.js developers who can own significant parts of its architecture and ship production code. The role is a long-term, full-time position, working directly with engineering leadership, product managers and the CEO.

Key responsibilities

• Build high-performance backend services and APIs for enterprise-grade SaaS applications.
• Develop scalable, secure Node.js microservices and integrations within the Salesforce ecosystem.
• Create modern front-end experiences using Vue.js and TypeScript for enterprise users.
• Build CI/CD pipeline tooling, automation frameworks and developer productivity infrastructure.
• Implement real-time data processing and event-driven architectures handling sensitive enterprise data at scale.

Required profile

• 5+ years of professional Node.js development in production environments.
• Deep experience with TypeScript in production codebases.
• Proven experience with SQL and NoSQL databases, query optimization and data modeling.
• Experience with Git workflows, code review, automated testing and CI/CD pipelines.
• Understanding of containerization (Docker) and cloud services (AWS/GCP/Azure).
• Preferred: Salesforce development (Apex, LWC, Visualforce), Salesforce ISV/AppExchange experience, Vue.js (Vue 3 Composition API), and experience in B2B SaaS under strict compliance (SOC 2, HIPAA, FedRAMP, GDPR).

Required skills

• Node.js, async programming, event loops, streams, OAuth 2.0, JWT, RESTful API design
• TypeScript, SQL and NoSQL databases
• Docker, CI/CD pipelines, Git
• Preferred: Salesforce (Apex, LWC, Visualforce), Vue.js 3

What we offer

• Competitive compensation commensurate with experience and impact.
• Direct collaboration with the founding team and engineering leadership.
• A profitable, stable company with aggressive growth plans.
• Work on enterprise-grade products used by large organizations.
• Remote-first flexibility with a results-oriented work environment.