Senior AI-Driven Full-Stack Engineer — Next.js & APIs

Firmable Pty Ltd; City of Melbourne; Hybrid; AUD 120,000 - 180,000; Full time

Job summary

Firmable Pty Ltd is seeking a senior software engineer to build AI-powered production web apps using Next.js and robust backend fundamentals. You will design REST APIs, model data in Postgres, and implement multi-tenancy with scalable background jobs.

You will ship features using LLMs, tool calling, RAG, and agents, with structured output and strong debugging discipline. Claude Code or Cursor will be part of your daily workflow for planning, review, and validation of AI output.

Qualifications

• 4+ years shipping production web apps with Next.js.
• Strong backend fundamentals: REST APIs, PostgreSQL modelling, auth and multi-tenancy.
• Hands-on with agentic AI: shipped features using LLMs, tool calls, RAG, agents, structured output.
• AI-native workflow: daily use of Claude Code or Cursor for planning, delegation and review.
• Excellent written English for async updates, specs and PRs; proactive risk communication.
• Ownership mindset: delivering ambiguous problems to measurable outcomes.
• Daily use of AI tools for API design, debugging, code review, test coverage and architecture.

Skills

Next.js

Production Web Apps

REST APIs

PostgreSQL

Auth & Multi-tenancy

Background Jobs

LLMs & AI

Tool Calling

RAG

Agents

Structured Output

Debugging

Code Review

Test Coverage

Architectural Thinking

English Communication

Ownership Mindset

Tools

Claude Code

Cursor

Job description

Firmable Pty Ltd is seeking a senior software engineer to build AI-powered production web apps using Next.js and robust backend fundamentals. You will design REST APIs, model data in Postgres, and implement multi-tenancy with scalable background jobs.

You will ship features using LLMs, tool calling, RAG, and agents, with structured output and strong debugging discipline. Claude Code or Cursor will be part of your daily workflow for planning, review, and validation of AI output.