Fly.io ships full applications to 30+ regions worldwide with Anycast routing and Firecracker microVMs. The engineering culture is small-team, blog-heavy, and famously opinionated. The interview process is async-friendly and rewards writers as much as coders.
Process
Recruiter screen → take-home async work sample (paid) → 60-minute pair-programming → 60-minute system design → 60-minute past-project deep dive → behavioral. Cycle: 3–5 weeks. Fly.io is famous for its detailed rejection feedback.
What they actually ask
- Design Anycast routing for global application deployment
- Design Firecracker-based microVM scheduling and lifecycle
- Design a distributed Postgres setup with regional read replicas
- Coding: practical Go or Elixir, often involving network protocols
- Past-project deep dive: must defend choices and tradeoffs
Levels and comp (2026)
- SE: $180K–$240K total
- Senior SE: $260K–$340K
- Staff: $360K–$470K
- Principal: $490K–$640K
Prep priorities
- Read the Fly.io blog religiously — they hire people who already engage with their writing
- Brush up on networking (Anycast, BGP, WireGuard, IPsec)
- Be fluent in Go or Elixir (Fly.io uses both heavily)
Frequently Asked Questions
Is Fly.io fully remote?
Yes. Distributed globally with concentration in North America. ~50–80 employees.
How does Fly.io compare to Vercel or Render?
Fly.io is more infrastructure-flavored — bring your own container, deploy globally. Vercel is frontend-specialized; Render is broader PaaS.
What is the take-home like?
Small but realistic — a few hours of work, paid. Quality matters more than completeness.