Backend engineer at Fireworks AI building platform systems for AI model orchestration, fine-tuning, billing, and developer APIs. Focus on scalable services, product impact, and enterprise features.
You’ll be a core builder of the backend systems that power Fireworks:
Our main web application
Model and fine-tuning job orchestration
Billing and enterprise features
Accounts, org management, access controls
Policy enforcement and governance
APIs and developer tooling
And many other cool things!
This is platform engineering with product impact. Your systems will directly shape how customers build on top of AI. You’ll work closely with product, frontend, infra, and GTM to ship end-to-end features — not just tickets.
Design and build scalable backend services
Own major product surfaces from architecture to production
Improve reliability, performance, and developer experience
Work directly with customers to understand pain points
Ship enterprise-grade features without enterprise slowness
Use AI tooling aggressively — we expect you to automate yourself
You like building real products, not just infrastructure for infrastructure’s sake
You enjoy driving initiatives across teams to get things done
You think in terms of systems, tradeoffs, and business impact
You care about developer experience and clean abstractions
You’re curious about AI and want to build where the future is going
You want ownership, not task lists
Comfortable collaborating with both humans and AI systems (Yes, We’re Serious)
5+ years of experience helping humans solve real problems
2+ years of working with AI — agents, bots, chats, or building on top of models