Senior Full Stack Engineer

Remote within Australia, with the option of working from the Taree NSW office · Full time

Senior Full Stack Engineer Own the VIABUILD product codebase alongside the founder and ship construction software to production every week.

VIABUILD is part of CALDON™ Group. Construction intelligence platform. Software that changes how builders run their businesses.

This position exists to give VIABUILD a second pair of senior hands on the product so the founder is no longer the only person able to build, review and deploy it. The Senior Full Stack Engineer owns the codebase jointly with the founder, ships work to production without supervision, makes architectural calls that hold up as the product grows, and pushes back honestly when something is being built the wrong way. Success means the product keeps moving at speed with fewer defects reaching customers, and the founder can step away from the code for a fortnight without the product stalling.

Reports to Founder, Oryn Technologies Pty Ltd trading as VIABUILD

What this position owns

1. Build. Core construction management application

Design and ship features across jobs, budgets, purchase orders, variations, progress claims and supplier invoices

Deploy your own work to production and verify it behaves as intended once live

Ship changes that founding builders notice and can use

Write and maintain Postgres schema, migrations and row level security policies that keep builder data separated correctly

Fix defects found by customers ahead of new feature work

Keep the Next.js, TypeScript, Supabase and Vercel stack current and coherent rather than accumulating parallel patterns

2. Extend. Oryn document intelligence and automation

Build and improve the text, vector CAD and vision extraction pipelines that turn builder documents into structured data

Integrate LLM capability into product workflows so it holds up under real customer data rather than in a demo

Measure and improve extraction accuracy on real documents and record what changed

Progress the read only MCP server and the step graph automation engine from in flight to production ready

Handle failure modes, retries and cost so pipelines stay predictable as volume grows

3. Decide. Architecture and technical direction

Make architectural calls independently when the founder is not available

Write down each significant design decision, the options considered and the reasoning

Review the founder's code honestly and say clearly when something has been built the wrong way

Raise what should not be built and argue the case for cutting scope

Flag technical debt that will bite within the next quarter and propose the fix

4. Communicate. Working well without a shared room

Keep written updates clear enough that the founder always knows what is shipped, what is next and what is blocked

Document how systems work so a third engineer can be onboarded without a handover meeting

Hold a straight weekly conversation with the founder about priorities and trade offs

Respond to production incidents and communicate status and resolution in writing

5. Carry. Production ownership and reliability

Take full responsibility for the product in production, including monitoring and incident response

Run the product end to end for a fortnight without the founder involved

Keep deployment frequent and low drama with small, reversible changes

Reduce the founder's required time in the codebase quarter on quarter

Set up and maintain the guardrails, tests and checks that catch problems before customers do

The role VIABUILD is construction intelligence software that changes how builders run their businesses. This is our second VIABUILD hire and the first engineer other than the founder. You will own the product codebase alongside him and ship to production yourself.

The stack is Next.js, TypeScript, Supabase and Vercel. The work spans the core construction management app covering jobs, budgets, purchase orders, variations, progress claims and supplier invoices, plus Oryn, our document intelligence layer running text, vector CAD and vision extraction pipelines. A read only MCP server and a step graph automation engine are in flight.

What a good week looks like Meaningful work merged to main and deployed. One or two things shipped that a customer will notice. A real design decision made and written down. And a straight conversation with the founder about what we should not be building.

Where we are Fifty founding builders are using the product. We are pre revenue and preparing to raise. Whoever takes this role is joining before it is safe. The person who suits it wants ownership and speed rather than process and certainty. Someone who needs a mature engineering organisation around them will not enjoy it.

Remote within Australia, with the option of working from our Taree NSW office. You report directly to the founder.

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