Marcus Flavius

I’m a Software Engineer focused on backend and distributed systems. I build production-ready applications—APIs, complex business flows, third-party supplier integrations, and data processing pipelines—designed to operate reliably in multi-tenant environments. My primary stacks are Elixir and TypeScript, and I also go deep into systems languages like Rust, C/C++, and OCaml to sharpen my thinking around memory management, concurrency, and performance trade-offs.

At Just Travel, I designed and delivered integrations with external supplier APIs across a multi-tenant travel platform, owning the full cycle from discovery to production rollout. I built multi-provider abstraction patterns with Elixir behaviours, developed asynchronous data pipelines with Oban for catalog synchronization and background processing, and delivered large-scale data backfills with zero downtime. I also investigated live financial and data inconsistencies across integration boundaries, then translated root-cause findings into documented analyses and architectural decisions, working with PostgreSQL and Ecto on multi-tenant modeling, query optimization, and data integrity.

Earlier, at Elebbre and Hollowsoft, I developed scalable full-stack systems and low-latency, highly concurrent services for real-time communication and video streaming. I paired Elixir and Phoenix backends with modern frontend experiences using React and Next.js, integrating APIs, databases, and external services within maintainable, clean architectures. I thrive in cross-functional environments where I can continuously deliver features while keeping system performance, correctness, and long-term evolution front and center.