Member of Technical Staff, NexusActive$200K–$290K

Fireworks AI
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The opportunity

We just shipped Fireworks Nexus: a drop-in platform that lets engineering organizations route their AI workloads off expensive proprietary models and onto high-performing open models like Kimi-K3 and GLM-5. 2, without changing how a single developer works.

What you'll do

  • Own product features end-to-end across Nexus and the broader Fireworks: platform: the intelligent router, FireConnect harness integrations, cost observability, enterprise controls and policy, the developer console, API surfaces, the model playground, fine-tuning workflows, and billing, scoping the problem, building it, shipping it, instrumenting it, and iterating on real usage.

  • Build the routing and migration layer that scores request difficulty in real: time and sends routine work to open models while passing hard tasks through to a customer's existing provider—the system that delivers 3–5x cost reductions without sacrificing quality.

  • Make adoption frictionless: extend FireConnect and our Anthropic- and OpenAI-compatible APIs so a team can drop Nexus into their existing tools with just a base URL and a model ID, and improve the caching and infra paths that turn that into material cost savings.

  • Work across the full stack: frontend (React/TypeScript), backend services (Python, Go), APIs, and data layers, to ship polished, production-quality product surfaces for deeply technical users.

  • Build for products evolving week to week: new models, new serving paths, new consumption models, new enterprise controls, and new multi-agent harness tooling.

  • Partner closely with Infrastructure, Applied Research, Growth, Data, and: Design to turn raw platform capability into products developers love.

What they're looking for

  • Instrument everything you build and let the data tell you where the friction is — then remove it.
  • + years as a software engineer, with meaningful time spent building and shipping user-facing products.
  • Strong full-stack skills, comfortable across frontend (React/TypeScript),: backend (Python, Go, or similar), APIs, and databases.
  • A track record of shipping developer-facing products: APIs, dashboards, consoles, CLIs, or developer tools.