Webhook idempotency gaps causing duplicate charges or missed events
Common in Series A–B fintech and SaaS
Reconciliation fixes in 2–4 weeks
Melbourne · Australia-wide · Remote
We design and build scalable backends, real-time data pipelines, and AI automation for high-growth companies. Firebase, Supabase, Stripe, HubSpot, Meta — integrated and reliable.
Prefer a longer form? Request a free review · See pricing ranges
Call 03 7073 2727 – same team, same week.
Response SLA
< 1 day
Free
30-min call
Walk away with
Async report
Who you'll work with
Rae
Founder, Scale Stack
I started Scale Stack after years shipping production backends — Firebase, Stripe webhooks, real-time pipelines, and LLM integrations — for teams that couldn't afford a full platform org yet.
Every architecture review is run by me personally: no hand-off to juniors, no sales deck. You get a straight answer on what's broken, what to fix first, and what it would cost.
I've personally run architecture reviews for 20+ teams across fintech, SaaS, logistics, and health-tech.
- Firebase & serverless at scale
- Stripe / HubSpot / Meta integrations
- Real-time pipelines & AI automation
- Melbourne-based, Australia-wide
Illustrative benchmarks — anonymised
Example outcomes from recent engagements
Representative results from architecture and build work — not a guarantee of your outcome. Every system is different.
Series B fintech · Melbourne
Reconciliation latency
6h → 11min
Logistics SaaS · Australia-wide
Infra spend on 4× traffic
−38%
Health-tech platform · ANZ
HIPAA-aligned pipeline shipped
5 weeks
B2B marketplace · Sydney
Webhook drop rate
2.1% → 0.02%
Problems you solve
Revenue-critical systems need someone who thinks like an architect, not a coder.
Data is messy
Systems don't talk. CRMs, payments, and internal tools are siloed. You spend more time fixing than building.
Automations break
Webhooks fail, retries don't exist, and no one knows why. When it breaks at 2am, you're the one fixing it.
Scaling costs explode
Serverless should scale down too. Poor architecture means bills that grow faster than revenue.
AI without infrastructure
LLMs and agents are useless if they can't read your data, trigger workflows, or run reliably in production.
Sound familiar? Get a free architecture review or leave your email above.
Try it on your phone or desktop
Pre-scale diagnostic
Four quick choices—we map a realistic priority stack you can discuss on a call. No signup required.
Step 1 of 4
What are you building?
Pick the closest match—we tailor the readout to your context.
Live ops · anonymized signal
What a Scale Stack system looks like when it's running
Event-driven infrastructure with observability baked in. Hover any node to see the integration — packets are events flowing through a production-grade backend.Tap any node to explore the integration — packets are events flowing through a production-grade backend.
Live
Webhooks processed
142,316
p95 API latency
138 ms
Pipeline throughput
8.4 k/min
Uptime (30 days)
99.98 %
Illustrative signal based on representative Scale Stack deployments. Individual client metrics vary.
Want this for your stack? Request a free review.
Architecture in practice
See the gaps before they hit production
We audit cloud spend, webhook reliability, and integration paths, then give you a clear roadmap for scale, reliability, and AI automation on your stack.
scalestack-terminal
Starts when this panel is on screen.
Systems we build
Infrastructure that automates operations, processes data, and scales your product reliably.
Trusted across modern stacks
Integrations and infrastructure teams actually ship on
We build revenue-critical systems on battle-tested tools from cloud, payments, AI, and growth ecosystems.
Firebase
Supabase
Claude AI
Gemini
Stripe
Meta
WhatsApp
Telegram
HubSpot
Google Cloud
PostgreSQL
Next.js
Vercel
Industries we've shipped systems for
- Fintech
- Health-tech
- Logistics
- B2B SaaS
- Marketplaces
- E-commerce
Case studies
Architecture write-ups with concrete outcomes — anonymised client details, real technical patterns.
ANZ nonprofit platform
Real-Time Donor Matching & Payment Processing Pipeline
Architecture for reliable donor matching, Stripe payment processing, and CRM sync at scale: event ingestion, idempotent workers, and near-real-time dashboards for fundraising teams.
Batch jobs → real-time sync
B2B SaaS · Melbourne
SaaS Backend: MVP to Scale
How a Melbourne B2B SaaS team moved from MVP to multi-tenant scale on Firebase and Stripe: tenancy, auth claims, idempotent billing, and cost-predictable serverless design without a rewrite.
4× tenant growth, cost held flat
Illustrative findings — not client quotes
What architecture reviews typically uncover
These are representative patterns from reviews we run — anonymised and aggregated. Your report will be specific to your stack and traffic.
Firestore/Postgres access patterns that won't survive 10× traffic
Multi-tenant SaaS backends
Cost and latency stabilised before launch pressure
Cron-based jobs masking real-time requirements
Marketplaces and ops-heavy platforms
Pipeline delivery in 4–6 weeks
Free architecture review
Get a free architecture review — no pitch, no obligation
Tell us about your backend, integrations, or automation challenge. 30-min call plus a written async report — we reply within one business day whether you hire us or not.
- ●Response within 1 business day
- ●Architecture + growth audit included
- ●Stack-level recommendations for your exact tools
- ●Prefer the phone? 03 7073 2727
SEO + buyer education
Frequently asked questions
Answers for founders and technical leaders planning scalable systems.
What kind of systems does Scale Stack build?
Scale Stack builds backend architecture, event-driven integrations, real-time data pipelines, and AI automation systems for high-growth companies that need reliability and measurable business outcomes.
What happens after I request a free review?
We reply within one business day, run a free 30-min architecture call focused on your stack, and send a written async review you keep whether we work together or not.
Do you work with Firebase, Supabase, Stripe, and HubSpot?
Yes. We regularly integrate platforms such as Firebase, Supabase, Stripe, HubSpot, Meta, WhatsApp, Telegram, and related tooling for growth and operations.
How much does working with Scale Stack cost?
Architecture reviews are free. Build sprints typically start from $15k AUD; platform retainers from $5k/mo. See our pricing page for ranges and what's included.
Ready to architect your system?
Free architecture review. No obligation. You walk away with a written async report whether we work together or not.
Questions first? 03 7073 2727