Start searching
Back to Jobs
Full timeTechnology

Senior Full Stack Engineer - Agent Experience

NinjaTech AISydney, New South Wales🇦🇺Australia

Quick overview

SeniorityMid Senior
Employment typeFull Time
Work modeOn Site
LocationSydney, New South Wales, Australia
FastAPINext.jsSupabaseAWSCDKPythonReactTypeScript

Job description

Sydney Full-time On-site/hybrid

SuperNinja is an AI workforce that plans, writes code, runs research and ships real work for customers. You would own the surface where people meet that agent - the thread, the workspace, the moment a task becomes a deliverable. It is the highest-visibility slice of the product and it changes weekly.

What you'll do

  • Own end-to-end slices of the agent experience - UI, API and the backend services behind them, not just the frontend of someone else's endpoint.

  • 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.

What we're looking for

  • 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.

Stack: Next.js/React/TypeScript, Python/FastAPI, Postgres/Supabase, AWS (CDK, CloudFront, ECS, Lambda, Cognito), containerised agent sandboxes.

Similar jobs

Apply