Backend & Systems Engineer

William Ferreira

I’m a senior backend engineer with more than six years across fintech, lawtech, and media. I build systems end to end — data models, APIs, permissions, infrastructure — and I’m comfortable owning a product as its sole author.

These days I’m at Grafiniti, a US finance-analytics startup, where I work on production AI agents: long-running, stateful systems for finance workflows, and the LLM tooling around them. I work remotely, in the terminal, on Linux.

Curriculum Vitae jobs.william@proton.me LinkedIn GitHub

Aside

Away from work I tend to build things at the lower levels — a native Linux daemon that drives the RPM shift LEDs on Thrustmaster racing wheels from sim telemetry (repo, write-up), and assorted systems and infrastructure projects on GitHub.

I also write, occasionally — notes →