Portfolio · Production SaaS

BizPilotAI — Production-ready AI Business Automation Platform

A live commercial SaaS proving AI tools, Stripe billing, bilingual ops, and enterprise-grade safety — not a demo.

Production stack highlights

Architecture, Stripe SaaS billing, AI workflow orchestration, and observability — designed for commercial operations.

  • Next.js
  • PostgreSQL
  • Stripe
  • Docker
  • audit_logs
  • Replay-safe webhook
  • Bilingual JA/EN
  • Rollback-safe deploy
  • Structured logging

System architecture showcase

How BizPilotAI is structured as a production-ready AI SaaS: request paths, billing, AI workflows, deployment, and ops.

System Architecture

A Next.js application behind nginx, with dedicated API routes, PostgreSQL persistence, Stripe for revenue, and provider APIs for AI tools — all separated by environment.

  • App Router + API routes
  • Plan entitlements before tool execution
  • Dedicated STG / PROD data stores
High-level application and integration topology

Request Flow

Every user-facing action flows through validation, trace_id propagation, and structured persistence — suitable for support and incident response.

  • Input validation at the edge
  • trace_id on API and logs
  • Consistent JSON error shapes
Typical page and API request lifecycle

Billing Flow

Stripe Checkout for conversion, signed webhooks for truth, and idempotent handlers so subscription state cannot drift — no unsafe manual replay.

  • Checkout → webhook → entitlements
  • Catalog sync with internal plan matrix
  • Commercial checklist before go-live
Stripe billing and entitlement sync

AI Workflow Flow

Tool calls pass entitlement checks, PII guards, and rate limits before orchestration. Metadata lands in audit_logs — not raw prompts in analytics.

  • Server-side tool execution
  • BYO API key path for Pro tiers
  • Usage visibility without leaking content
AI tool orchestration and guardrails

Deployment Model

Docker-based STG and PROD stacks on isolated ports and volumes. nginx terminates TLS and routes to the correct environment without touching sibling services.

  • Compose projects per environment
  • SHA-recorded releases + rollback runbooks
  • Build-time public env separation
STG / PROD deployment topology

Observability

Structured logs, health endpoints, and audit_logs give operators a picture of system and business events — without exposing PII in telemetry.

  • /api/health with database signal
  • audit_logs for demo and inquiry actions
  • nginx and container health checks
Logging and observability path

Why production-ready matters

A prototype proves an idea. Production SaaS proves billing, rollback, observability, legal, auditability, and security.

DimensionPrototypeProduction (BizPilotAI)
BillingManual invoices or mock buttonsStripe Checkout, subscriptions, replay-safe webhooks
RollbackRedeploy and hopeSHA-tagged releases, STG soak, documented rollback
Observabilityconsole.logStructured logs, health checks, trace_id, audit_logs
LegalTerms link onlyPre-checkout consent, privacy policy, logged acceptance
AuditabilityNo trailaudit_logs with action metadata (no free-text PII)
SecurityShared keys in repoEnv isolation, rate limits, webhook signatures, RLS patterns

Business Impact

How a production-ready SaaS stack changes revenue, risk, and delivery — illustrated with BizPilotAI.

BizPilotAI is both a live product and a reference architecture for clients who need billing, AI tools, and ops safety in one delivery. The impact is measured in time-to-revenue, incident recovery, and sales confidence — not slide decks.

Time to first paid plan

Weeks not months

Stripe + catalog + entitlements

Billing incident recovery

Rollback + webhook idempotency

No unsafe manual replay

Market reach

JA + EN product

Single codebase, locale routing

Ops auditability

trace_id + audit_logs

Support and compliance ready

Before / After

Typical SMB path from prototype to production-grade SaaS.

Billing

Before

Manual invoices · spreadsheet plans

After

Stripe subscriptions · self-serve upgrade

AI tools

Before

Ad-hoc ChatGPT tabs · no usage limits

After

Entitled tools · BYO key · cost visibility

Deploy

Before

Single server · manual FTP

After

Docker STG/PROD · tagged rollback

Incidents

Before

Unknown state after webhook retry

After

Idempotent handlers · documented matrices

Compliance

Before

Terms pasted at checkout

After

Consent + logged acceptance trail

Operational Improvements

What operations teams gain when architecture is designed for day-2.

  • Structured logs with trace_id — faster support without exposing PII in analytics
  • STG soak before PROD — same Docker pattern as client deliveries
  • Backup + restore runbooks — Postgres volume isolation per environment
  • Health checks with database.ok — monitor real dependency failures
  • Webhook replay safety — subscription state stays consistent under retries
  • Bilingual content ops — one release pipeline for JA/EN

Expected ROI (illustrative)

Ranges for similar builds — actual ROI depends on ARPU, team size, and scope. Request a scoped estimate.

Illustrative only · not a guarantee. BizPilotAI metrics are a reference model, not your financial forecast.

Manual billing hours saved

20–40 h/mo

At scale with subscriptions

Incident mean time to recover

−30–50%

With rollback + runbooks

Sales cycle (technical proof)

−1–2 weeks

Live portfolio + architecture depth

API cost control (BYO path)

10–30%

Model routing + usage caps

Want to see ROI for your specific build? Request a scoped estimate.

Client Testimonials

What teams say after adopting production-ready patterns from BizPilotAI.

The production-ready architecture gave us confidence to scale. Billing works, rollback works, monitoring works — we shipped faster.

Engineering Lead

VP Engineering · B2B SaaS (confidential)

Context: After adopting BizPilotAI reference architecture

Stripe integration was the hardest part of our prototype. With BizDX's pattern, we went from idea to paid subscription in 3 weeks.

Founder

CEO · AI Tools Startup

Context: Billing & subscription build

Subscription plans (live product)

Free

¥0

AI Writer 10/mo · AI Chat 10/mo · AI Image 5/mo

Pro

¥4,980/mo

Unlimited tools · CSV export · priority support

BYO AI

¥2,980/mo

Pro + own API key · custom models · cost optimization

Overview

BizPilotAI combines AI business tools, SaaS billing, and DX automation in one production platform for SMBs.

  • AI Writer, AI Chat, AI Image Generation
  • Japanese / English product
  • Company info, Terms, Privacy — full legal pages
  • Credit-card billing · cancel anytime

AI Agent Platform

Department-ready AI tools with server-side execution, usage controls, and workflow-friendly design.

  • Tool suite with entitlements
  • BYO API key path
  • Usage logging and cost visibility

SaaS Billing System

Stripe Checkout and subscriptions with commercial governance — built for real revenue, not prototypes.

  • Free / Pro / BYO AI catalog
  • Tax-inclusive pricing display
  • Subscription lifecycle management

Multi-Plan Architecture

Plan catalog, entitlements, and feature gates aligned with Stripe products and internal permissions.

  • Plan-based feature matrix
  • Upgrade / downgrade paths
  • Entitlement sync after checkout

BYO AI

Customers bring their own API keys with custom model selection and API cost optimization.

  • Secure key storage
  • Model selection per tool
  • Platform vs BYO billing split

Replay-safe Stripe Webhook

Idempotent webhook handlers with no unsafe manual replay — subscription state stays consistent.

  • Event idempotency
  • Handler smoke runbooks
  • Incident matrices documented

Secure Contact System

Inquiry flows with validation, rate limits, trace IDs, and backend persistence for operations.

  • Structured inquiry API
  • Spam protection
  • Email + DB audit trail

Enterprise-grade Safety

STG-first deploy, rollback-safe releases, structured logging, and observability for production ops.

  • STG / PROD separation
  • SHA-based rollback
  • Structured logs + trace_id

What this proves

BizDX AI delivers the same class of system for clients: billing, legal, security, rollback, and auditability — not AI demos.

  • Commercial SaaS from MVP to production
  • Stripe + webhook + subscription expertise
  • Bilingual product and marketing sites
  • Remote-first delivery with documented ops

Discuss your architecture

Tell us your billing, AI, and compliance requirements — we scope MVPs to full SaaS.