Senior Full Stack Developer, AI Native

About the Company

Join Rex Software where innovation meets real estate

At Rex Software Group, we build technology that helps real estate and property professionals work smarter, move faster and deliver better experiences for their customers.

We are now taking the next step in how we build software by transitioning towards an AI native engineering model. This is not simply about adding AI features to our products. It is about fundamentally changing how our engineering teams design, build, test and ship software.

About the Role

We are looking for an experienced Senior Full Stack Developer who combines strong software engineering fundamentals with genuine experience using AI coding agents to accelerate development.

You will work across the full stack within one of our product streams, delivering production quality features while using AI coding agents as a core part of your development workflow. You will provide the architecture, context and direction, critically review the output and ultimately own the quality of everything you ship.

This is not a vibe coding role. We are looking for an experienced engineer who understands what good software looks like and can recognise when AI generated code is correct, secure, performant and appropriate for an established production codebase.

Responsibilities

Full Stack Product Development:

Design, build and deliver production quality features across frontend and backend systems within your product stream
Use AI coding agents as a primary development tool to generate, test, debug and iterate on code
Provide AI agents with the architectural context, coding standards and domain knowledge required to produce high quality outputs
Critically review AI generated code for correctness, performance, security, maintainability and architectural fit before it reaches production
Determine when AI assisted development is the right approach and when manual implementation will produce a better outcome
Debug and resolve complex technical issues across the stack using both traditional engineering techniques and AI assisted workflows

Engineering Quality and Architecture:

Work confidently within established system architecture, including database schemas, API contracts, service boundaries and deployment pipelines
Contribute to technical design discussions, architectural decisions and code reviews
Maintain and improve automated test coverage across the codebase
Ensure AI generated code is supported by appropriate testing and meets our engineering standards
Identify and address technical debt while balancing delivery speed with the long term health of our products
Take ownership of the quality and production readiness of the software you deliver

AI Native Engineering

Build and refine prompts, context documents and system instructions that help AI agents understand Rex's architecture, patterns and conventions
Improve established codebases for agent driven development through clear documentation, https://jobeax.com/link/ZKaU2SwE2F8hKgkt files, Skills and other AI friendly engineering practices
Experiment with new AI development tools, techniques and workflows to improve engineering productivity
Identify common failure modes in AI generated code and develop practices that improve the reliability and quality of agent output
Share effective prompting strategies, workflows and lessons with the wider engineering team

Collaboration and Knowledge Sharing

Work closely with Product Managers, Designers and Engineers to deliver against product priorities
Participate in technical planning, sprint ceremonies, code reviews and engineering discussions
Mentor and support other engineers through technical collaboration and knowledge sharing
Help uplift AI native development capability across the broader engineering team
Contribute ideas and feedback as we continue evolving how software is built at Rex

Required Skills

Strong commercial software engineering experience with the technical depth expected of a Senior Full Stack Developer
Demonstrated experience delivering software across both frontend and backend systems
Hands on experience using AI coding agents such as Claude Code, Cursor, GitHub Copilot, Cody, Aider or similar as part of genuine agent driven development workflows
Strong software engineering fundamentals across system design, API design, databases, testing and deployment
The ability to critically assess AI generated code and identify issues relating to performance, security, edge cases, maintainability and architectural fit
Experience working within established production codebases and making sound technical decisions in complex environments
Strong debugging and problem solving skills across the full technology stack
The ability to communicate technical concepts clearly and work effectively within a collaborative product team
A portfolio, GitHub profile or personal projects that demonstrate how you use AI within your development process

Preferred Skills

Experience with PHP, Laravel, https://jobeax.com/link/tzGekrj9a8ToGEDv, https://jobeax.com/link/6WcBICn0LM558SP0, PostgreSQL, MySQL, Docker, Kubernetes or GCP
Experience working within SaaS, PropTech or real estate technology
Familiarity with prompt engineering, context management and techniques for improving AI agent output
Experience contributing to open source projects or sharing technical knowledge publicly
Experience working within agile product teams with end to end ownership of software delivery

What will make you successful

You have strong engineering judgment and can quickly distinguish between code that simply works and code that belongs in a production environment.

You naturally look for ways to use AI to increase your leverage, but you do not blindly accept its output. You understand that AI generated code still requires engineering ownership, critical thinking and technical expertise.

You are curious about emerging tools and enjoy experimenting with better ways of working. You are equally comfortable diving into frontend code, investigating a backend issue, reviewing an API design or helping an AI agent understand an established architecture.

Most importantly, you take ownership of what you ship. Whether the code was written manually or generated by an AI agent, you are accountable for its quality in production.

Why join Rex now?

Rex Software Group is genuinely transitioning towards AI native software development. This is not an innovation lab or side project. It is becoming part of how we build and deliver our products.

You will have the opportunity to:

Help shape how AI native engineering works within an established software company
Work alongside experienced engineering and AI leaders who are invested in making the transition successful
Own meaningful work that reaches production and supports thousands of real estate professionals across Australia, New Zealand and the UK
Experiment with emerging AI development tools and help establish the practices that work
Join a growing business with ambitious plans and the investment to support them
If you are an experienced Full Stack Developer who is already changing the way you build software with AI, we would love to hear from you.

Full Stack Engineer

Start with your email