From spreadsheets to a custom ERP. In 8 weeks.
Order, inventory, quotes, booking, payments, automation, AI integration — built only for your business. 15-year enterprise architect (LG CNS · SK Planet), AI-Native. Perth, AU.
- 15+ years experience
- AWS Certified Developer
- Based in Perth, Australia
- Bilingual EN · KO
// advantage
Why we're fast
AI-Native development by a 15-year architect — not AI-generated by a prompt.
3–5x faster delivery
From discovery to launch in 4–8 weeks. AI tooling compresses the busywork so engineering time goes to architecture decisions.
40–60% lower cost
Fixed-scope MVPs. You get enterprise patterns without the enterprise retainer — contact us for a quote.
PDCA methodology
Weekly demos, versioned design docs, explicit success criteria. Scope doesn't drift because we measure it.
// services
Services
Four ways we help SMBs move off spreadsheets and onto systems built for them.
Operations Systems
ERP, orders, inventory, quotes, dispatch — your business backbone in one system. For trade, logistics, wholesale, and manufacturing SMBs.
Booking & Scheduling Systems
Time-slot booking, members, gift cards, payments — branded for your facility. Studios, gyms, courts, classes, indoor sports.
E-commerce & Custom Builds
Bespoke shopping malls, payment systems, marketplaces — commerce that fits your business. For SMBs starting online or hitting platform limits.
AI Integration & Automation
Connect the tools you already use (Stripe, Xero, Google Workspace, Firebase, AWS) and add AI where it matters — auto-classification, auto-replies, AI-assisted generation.
// portfolio
Portfolio
Real systems. Running today.
Warehouse ERP
Quote → order → dispatch → invoice unified across sales, ops, and finance. Live inventory, role-based access. Migrated off legacy AWS Lambda + Cognito to Supabase.
Adaptable to: wholesale distribution · light manufacturing · logistics · field service ops
Wholesale ↔ Retail Inventory
Three-way sync: wholesale stock ↔ retail stock ↔ Xero accounting. Month-end reconciliation went from a multi-day spreadsheet exercise to a one-screen check.
Adaptable to: retail chains · franchises · wholesale-to-online sync · multi-warehouse
Study Abroad Agent CRM
Lead → consultation → school shortlist → application → decision. Replaced HubSpot/spreadsheet patchwork with a workflow-fit pipeline.
Adaptable to: agencies · consultancies · multi-stage client journeys (immigration, recruitment, real-estate)
// clients
Trusted by SMBs in Sydney and Perth
Operations Systems
Marketing Sites
References available — ask the founders directly.
// process
How we work
Transparent, weekly demos, fixed scope.
- 01step
Week 0 — Discovery
Requirements workshop, data model, written scope, fixed quote.
- 02step
Week 1 — Design
UI mockups, architecture decisions, API contracts — all reviewable before code.
- 03step
Weeks 2–6 — Build
Weekly demo releases on staging. You test real features while we build the next slice.
- 04step
Weeks 7–8 — Launch
Production deploy, handover docs, two weeks of bug-fix support included.
// pricing
Pricing
Fixed-scope projects. No surprise invoices.
Project budget
On request
Baseline: AUD $30k for 8 weeks · scales down for shorter scope · fixed price after scoping
Pricing varies by project scope. Get in touch and we'll scope it together.
// founder
Built by Jungwoo (Jason) Lee
I'm a software architect with 15+ years building enterprise platforms at LG CNS (8y) and SK Planet (4y) in Korea, before moving to Perth in 2019 for a Master's at Curtin University. Since 2020 I've been running SJSoftware — shipping production systems for small and mid-sized businesses with the speed AI coding now makes possible.
AWS Certified Developer · Master of Commerce (Information Systems & Technology), Curtin University
What I care about
Transparency over surprise
The quote I give you is the price you pay. Every week you see working software in a demo, and I explain technical progress in plain language you don't need a CS degree to understand.
Execution over promises
Running code initial within 1 week. Running code in staging (with your feedback applied) within 2 weeks — always.
Client outcomes over tech puritans
The best architecture is the one that helps your business — not the one that wins Hacker News.
FAQ
// contact
Let's build something
Reply within 24 hours, on any working day.
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