Member of Technical Staff, Nexus

Job summary

Responsibilities

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.

• Own product features end-to-end across Nexus and the broader Fireworks platform: the intelligent router, FireConnect harness integrations, cost observability, enterprise controls…
• 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…
• 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…
• 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…
• Build for products evolving week to week: new models, new serving paths, new consumption models, new enterprise controls, and new multi-agent harness tooling.

What they're looking for

• 3+ 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.
• Genuine end-to-end ownership: you're as comfortable scoping an ambiguous problem as you are deploying the fix at 2am.
• Strong product instincts: you optimize for the developer experience, not just the diff.

Tech stack

• PyTorch
• React
• TypeScript
• Python
• Go