Senior Full Stack Engineer - Agent Experience at NinjaTech AI | AU | Rezi

Senior Full Stack Engineer - Agent Experience at NinjaTech AI

Senior Full Stack Engineer - Agent Experience

NinjaTech AI · AU

3 weeks ago

Senior Full Stack Engineer - Agent Experience

NinjaTech AI · AU

24 days ago
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About the Role

You would own the surface where people meet the AI agent — the thread, the workspace, the moment a task becomes a deliverable. This is the highest-visibility slice of the product and it changes weekly.

Responsibilities

  • Own end-to-end slices of the agent experience — UI, API and the backend services behind them.
  • Ship agent-facing features into production continuously and stay on them: reliability, latency, incidents, observability.
  • Turn ambiguous product bets into working software in days, then decide from usage data whether to double down or delete it.
  • Work directly with our AI and science engineers on how tools, context and streaming behave in the product.

Requirements

  • 5+ years building and operating full-stack products in production.
  • Strong TypeScript/React (we run Next.js) and genuine backend depth in Python (FastAPI) — you can design a schema and debug a slow query, not only call an API.
  • Product instinct: you argue about the shape of the feature, not only the ticket.
  • Comfort with high change rates and incomplete specs. Agentic products do not hold still.

Skills

  • TypeScript
  • React
  • Next.js
  • Python
  • FastAPI
  • Postgres
  • Supabase
  • AWS
  • CDK
  • CloudFront
  • ECS
  • Lambda
  • Cognito

Location

  • Sydney

Work Type

  • Full-time
  • On-site/hybrid

Experience Level

  • 5+ years

About the Company

  • SuperNinja is an AI workforce that plans, writes code, runs research and ships real work for customers.