Book a 30-minute call
Skip to main content
zatersioBook a call

Engineer-led. Melbourne-built.

Custom software development in Melbourne, built by the engineers you talk to.

Internal tools, client portals, integrations and legacy migrations for mortgage brokers, insurance brokers, financial planners and law firms. Fixed-scope sprints, one fixed quote, and your client data kept in Australia. You own the code and the IP.

Live within 2 weeks of kickoff, or it's free.

What we build

Software that removes a specific piece of admin from your practice, connected to the tools you already run.

Internal tools

The spreadsheet that runs your practice, rebuilt as software: job boards, approval queues, dashboards and admin screens that talk to the systems you already pay for.

Client portals

Secure portals where clients upload documents, sign, track progress and ask questions, so your team stops chasing by email and phone.

Integrations

Two systems that should talk and do not. CRM to accounting, aggregator to document store, phone system to case file. We build the connection and keep it running.

Legacy and PHP migrations

The old PHP or Access application nobody dares touch, moved to a maintained stack in stages, with the data carried over and the business still running throughout.

MVPs

Working software your first users can log in to: web app, API, integrations, the lot. Scoped tight so the first release ships fast, then extended in fixed-scope rounds.

How projects run

Fixed-scope sprints. You know the scope, the price and the date before each one starts.

  1. Discovery call

    A 30-minute call with Lucky, our lead engineer. We map the problem, the riskiest unknowns and the smallest release worth shipping. You get a fixed-price estimate within 48 hours.

  2. Fixed-scope sprint plan

    The build is cut into sprints with a written scope for each. One price for the first release, agreed before we write a line of code. No hourly billing.

  3. Build in the open

    Daily commits in your repositories you can watch. Decisions and tests are documented as we go, not reconstructed afterwards.

  4. Live within 2 weeks of kickoff, or it's free.

    The first release goes live on your infrastructure inside that window. We hand over the code, the documentation and the deployment.

  5. Extend in sprints

    Each later round is scoped and quoted the same way, so you decide how far the product goes and what it costs before each step.

Your data stays in Australia

Every build runs on infrastructure you control. You choose how far that goes.

Your own servers

The software lives inside your network. Client files never leave the building. The strongest position for firms whose policy says data does not go outside.

AWS Sydney

Australian-resident cloud, under Australian law, without running your own hardware. For most practices this is the practical default.

Fully local AI

Where the software uses a language model, we can run it on hardware you own with no third-party AI provider in the path. LegalBox is built this way.

Across every option the same rule holds: your data is never used to train third-party models. More on the trade-offs on our data sovereignty page.

Fixed quote after the call

Every build is scoped per project. You get one number covering the first release before we write a line of code, and each later sprint is quoted the same way. No hourly billing. Automation and AI agent projects have published pricing.

We document development work so your accountant can assess any R&D Tax Incentive claim.

R&D Tax Incentive eligibility depends on your specific activities and the rules in force at the time. Proposed changes take effect from 1 July 2028 if passed. This is general information, not tax advice. Confirm your position with a registered tax agent.

Custom software FAQ

Lakitha 'Lucky' Sahan, founder and lead engineer of Zatersio

Lakitha “Lucky” Sahan

Founder & Lead Engineer, leads the Zatersio engineering team

LinkedIn

Book a 30-minute call

30-minute call with Lucky, our lead engineer. You leave with a ranked list of what to automate in your business and a fixed-price estimate within 48 hours. No obligation.