Engineering experience behind AussieSync

Enterprise offline-first point of sale

Problem

Retail environments suffer from network instability, causing data conflicts and lost transactions.

Outcome

Achieved zero data loss during connectivity drops and ensured financially correct, idempotent transactions.

• Angular
• Go
• PostgreSQL
• Redis
• SQLite

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High-traffic booking and payment engine

Problem

Concurrent demand for the same slot produces double-bookings, and payment failures silently lose revenue.

Outcome

Zero double-bookings under load, with reliable revenue capture and inventory that releases itself.

• NestJS
• PostgreSQL
• Redis
• Event queue

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Cross-marketplace order and inventory synchronisation

Problem

An item sells on one channel while still showing as available on another, and the oversell is discovered by the customer.

Outcome

No oversells or phantom stock, faster fulfilment, and a live view of the real position.

• Node.js & Go
• Event queue
• PostgreSQL
• ElasticSearch

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Multi-agent automation with programmatic guardrails

Problem

High operational overhead due to manual data aggregation and workflow management across disparate APIs.

Outcome

Drastically reduced manual processing time while maintaining strict programmatic guardrails.

• Python
• FastAPI
• LangGraph
• Vector databases
• n8n

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Grounded AI assistance across an HR platform

Problem

HR teams lost hours summarising meetings by hand, and a general-purpose assistant could not be trusted to answer policy questions.

Outcome

Hours of manual summarising eliminated, and instant grounded answers from company knowledge.

• LangChain
• Vector store
• OpenAI API
• n8n

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Geospatial matching and trustworthy ETAs

Problem

Matching a rider to a driver requires answering a geospatial question in milliseconds, against locations that never stop moving.

Outcome

Sub-second nearby-driver lookup, and ETAs riders can trust.

• Redis GEO & PostGIS
• Go & Node.js
• WebSocket
• Routing API

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Financial correctness under real-time contention

Problem

In live bidding, a late bid or a double-charged wager destroys trust in the whole platform.

Outcome

Provably fair, tamper-resistant competition with financial correctness under contention.

• Go & Node.js
• WebSocket
• Redis
• PostgreSQL

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Real-time video, chat and Q&A that holds up

Problem

Live video is unforgiving: presence must stay synchronised and connections must survive the networks people actually have.

Outcome

Face-to-face reach without travel, and live audiences that stay engaged.

• WebRTC
• Node.js signalling
• Redis pub/sub
• Flutter & React

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Forecasts a business can actually plan around

Problem

Most companies are data-rich and insight-poor: plenty of history, no forecast anyone trusts enough to order stock against.

Outcome

Fewer stock-outs and less dead inventory, with early warning on churn.

• Python
• Time-series models
• FastAPI
• PostgreSQL & Redis

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Recommendations that surface the long tail

Problem

Weak recommendations show everyone the same bestsellers, leaving the rest of the catalogue undiscovered.

Outcome

Higher basket size and engagement, and discovery of long-tail inventory.

• Python
• Graph store
• ElasticSearch
• Redis

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Zero-downtime delivery for a regulated healthcare platform

Problem

Fragile deployment cycles and high latency in a heavily regulated healthcare platform.

Outcome

Delivered zero-downtime automated releases and highly available infrastructure.

• Kubernetes
• Docker
• Terraform
• CI/CD pipelines
• Helm & Ansible

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Infrastructure monitoring that survives the outage

Problem

Problems become outages while nobody is at a desk, and the monitoring itself often goes dark exactly when it is needed.

Outcome

Problems caught before they became outages, with monitoring and control from anywhere.

• Go & Node.js agents
• Time-series store
• WebSocket
• Flutter

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Compliant patient data with integrated telehealth

Problem

Patient data must be kept under legal compliance without making the system unusable for the clinicians who depend on it.

Outcome

Legally-defensible handling of patient data, clinician-friendly workflows, and audit readiness.

• NestJS
• PostgreSQL (encrypted)
• RBAC & IAM
• Immutable audit log
• AWS

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Non-repudiable transaction approval for a retail bank

Problem

A bank needs to prove a transaction was approved by a specific customer on a specific device. A shared secret cannot do that.

Outcome

Non-repudiable transaction approval, with device binding that prevents credential lifting.

• PKI & Certificate Authority
• HSM & hardware keystore
• Device attestation
• Go & PostgreSQL

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Versioned compliance documents that stay consistent offline

Problem

Regulated documentation has to be versioned, access-controlled and auditable, while being edited from sites with no connectivity.

Outcome

Compliance-ready records, with no lost or conflicting files across devices.

• AWS S3
• PostgreSQL
• ElasticSearch
• Versioned sync protocol

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Zero-touch parking through plate recognition

Problem

Staffed booths and ticket machines are slow, expensive and error-prone, and queues form at exactly the wrong moment.

Outcome

Zero-touch entry and exit, no cash handling, and faster throughput with fewer queues.

• Python CV & OCR
• Go & NestJS
• PostgreSQL
• Gate hardware integration

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