Product Engineering

Build Software That Creates
Competitive Advantage

Custom web applications, native mobile apps, SaaS platforms, and internal workflow tools. Engineered for your specific business logic. Deployed on your infrastructure. Owned by you. FI Digital — 200+ engineers, 10 years in production.

Start a Discovery Sprint Explore Case Studies
Why Custom?

The Case for Custom Software

Every business reaches a point where off-the-shelf software stops working. The CRM does not match your sales process. The reporting tool cannot combine data from five systems. You stack subscriptions on top of subscriptions and build workarounds that break when the vendor updates.

Custom software solves this permanently. Built around your operational logic, your data structures, your compliance requirements, and your competitive differentiation.

FI Digital builds this software. Not templates configured to look custom. Not low-code platforms with limitations you discover too late. Real, production-grade applications built with React, React Native, Python, FastAPI, and modern cloud infrastructure. You own the source code. You own the IP.

Competitive Differentiation

Logistics

A logistics company that builds its own dispatch optimisation system has an advantage over one using a generic SaaS tool.

Financial Services

A financial services firm that builds its own adviser portal controls the client experience end to end.

Healthcare

A healthcare provider that builds its own rostering system can account for award rates, compliance rules, and patient acuity in ways no off-the-shelf product can.

200+

Projects Delivered. Built to last.

Capabilities

What We Build

Four product engineering capabilities — each a standalone practice with dedicated engineering teams.

Web Applications
01

Web Applications

Customer portals, internal workflow tools, SaaS dashboards, and multi-tenant platforms. Built for your specific business logic. Deployed on Australian infrastructure. You own the code.

ReactPythonFastAPIAWS / Azure
Explore Capability
Mobile Applications
02

Mobile Applications

Native iOS and Android apps for field workers, customers, and enterprise teams. Offline-capable. Real-time sync. Biometric authentication. Camera and scanner integration.

React NativeiOS & AndroidOffline-first
Explore Capability
SaaS & MVP Builds
03

SaaS & MVP Builds

From concept to paying customers in 12–16 weeks. Market validation, UX design, engineering, launch, and iteration. 30+ SaaS products launched.

12–16 wksStripe billingMulti-tenantIP yours
Explore Capability
Product Modernisation
04

Product Modernisation

Modernise legacy systems without losing business logic. Strangler fig migration, front-end refresh, API layer creation, database migration — all available.

No rip-and-replacePhasedZero data loss
Explore Capability
Our Process

Engineering Methodology

We follow a disciplined engineering methodology honed over 200 plus projects. Predictable cadences, rigorous QA, and complete transparency.

Discovery & Architecture

Weeks 1–3

We audit your requirements, map your data flows, define your API contracts, and produce a detailed technical architecture document. You review and approve before development begins.

Sprint Development

Weeks 4–10

Two-week sprint cycles with fortnightly demos. You see working software every two weeks. Our engineers write clean, tested, documented code. We use CI/CD pipelines for automated testing and deployment. Every commit is reviewed.

Quality Assurance

Ongoing

Automated unit tests, integration tests, and end-to-end tests run on every build. Our QA team conducts manual testing for user experience, edge cases, and cross-browser or cross-device compatibility.

Launch & Handover

Weeks 11–14

We deploy to your production environment, configure monitoring and alerting, conduct performance testing under load, and hand over complete documentation, source code, and operational runbooks.

Ongoing Support

Post-Launch

Optional retainer for bug fixes, feature additions, and performance optimisation. Typically 8 to 16 hours per month. Your team can self-manage with our support available on demand.

Engineering Foundation

Technology Stack

No religious attachment to frameworks. Every architecture decision is documented and explained before a single line of code is written.

Front-End

React
React
React Native
React Native
Next.js
Next.js
TypeScript
TypeScript

Back-End

Python
Python
FastAPI
FastAPI
Node.js
Node.js
Django
Django

Database & Analytics

PostgreSQL
PostgreSQL
MongoDB
MongoDB
Redis
Redis
Snowflake
Snowflake
Databricks
Databricks

Infrastructure

AWS
AWS
Azure AU
Azure AU
Docker
Docker
Kubernetes
Kubernetes

DevOps

Terraform
Terraform
GitHub Actions
GitHub Actions
Datadog
Datadog
Sentry
Sentry
FAQ

Frequently Asked Questions

Custom software projects typically range from $50,000 for a focused MVP to $500,000 or more for enterprise-grade platforms. The key variables are complexity (number of integrations, user roles, and business rules), timeline, and ongoing support requirements. We provide a detailed estimate during the Discovery phase.
A typical web application takes 10 to 16 weeks from Discovery to launch. Simpler applications (internal dashboards, single-purpose tools) can ship in 6 to 8 weeks. Complex, multi-user platforms with extensive integrations may take 20 to 24 weeks. We define the timeline during Discovery and hold to it.
Yes. You own 100% of the source code, intellectual property, and all documentation. We deliver the complete codebase to your repository at handover. There is no vendor lock-in and no ongoing licence fees for the code we write.
Yes. We use React Native for cross-platform mobile development, which means a single codebase runs on both iOS and Android. This reduces cost and development time without sacrificing performance. For cases requiring platform-specific functionality, we build native modules.
This is where FI Digital is uniquely positioned. Our four service pillars (Product Engineering, Data Platforms, AI Agents, Business Systems) are designed to work together. A customer portal can pull data from a Databricks-powered analytics layer. A mobile app can include an AI copilot. A SaaS platform can connect to your Zoho CRM. We design the architecture to support cross-pillar integration from day one.
Both. We build MVPs for funded startups (typically Seed to Series A) and enterprise-grade platforms for established companies. The engineering approach is the same. The difference is scope, compliance requirements, and integration complexity.

Ready to Build?

Bring us your operational challenge or your product concept. We will give you an honest technical assessment, a clear architecture plan, and a transparent timeline for delivery.

Book a Product Engineering Discovery Session View Product Engineering Case Studies