Stefan Nenadic

I’m a Senior Full-Stack Engineer with extensive experience designing and scaling SaaS platforms across cloud-native and distributed environments. I focus on multi-tenant architectures, API-driven systems, and secure, payment-ready workflows.

I’ve built high-performance applications using modern JavaScript/TypeScript ecosystems and cloud infrastructure, with a strong emphasis on reliability and automation. In recent work, I orchestrated CI/CD pipelines with Docker and GitHub Actions to improve deployment reliability and reduce release downtime.

My engineering strength spans backend pipelines and product-critical features: media ingestion and processing with FFmpeg (transcoding, thumbnail generation, and streaming optimization), and authentication flows using OAuth/JWT with role-based access control and tenant-aware authorization. I’ve also integrated Stripe billing with subscriptions, usage metering, and secure webhook handling for real-time payment events.

I care about building systems that scale safely—implementing multi-tenant SaaS modules, workspace-based isolation, and database evolution with migrations. I’ve also strengthened observability using Sentry and Datadog for distributed tracing, error monitoring, and system diagnostics, and delivered solutions across AWS and Azure ecosystems.