SM-Post is a multi-tenant social-media posting and scheduling platform — the self-hostable core of a Buffer/Hootsuite-style product, delivered as a pnpm + Turborepo monorepo. Four apps: a Next.js 15 (App Router) + React 19 web client, a Fastify 5 API, a BullMQ worker, and a Playwright E2E suite; seven packages including a Prisma 6 data layer (33 models, 14 hand-authored migrations), a provider SDK, and an AES-256-GCM token vault. It runs on Postgres 17, Redis 7 and S3/MinIO. Nine real providers ship in the box — Bluesky, Mastodon and Telegram work out of the box, while LinkedIn, Facebook, Instagram, X, Pinterest and TikTok activate as soon as you supply your own platform-app credentials — plus a MockProvider whose content markers drive every branch of the publish state machine in tests and demos. The publishing engine is the differentiator: Postgres is the source of truth and BullMQ jobs are disposable, deterministically-named triggers, so you can flush Redis entirely and rebuild all queue state with one command. BullMQ is pinned to a single attempt and the application owns retry policy in the database (attemptCount / maxAttempts / nextRetryAt), because letting the queue retry would double-post; a maybe-sent outcome is never auto-retried and instead lands in an operator needs-review inbox, and a recorded success is never re-posted. Multi-tenancy is workspaces and projects with OWNER/ADMIN/MEMBER roles, hash-only email invitations, and an append-only audit stream. Per-project approvals bind an approval to a sha256 snapshot of the post content, media, per-provider overrides and targets — and the worker recomputes that hash immediately before fan-out, so an edited post can never ride an old approval. Stripe Checkout, the Billing Portal and a signed raw-body webhook back FREE/PRO/TEAM tiers with channel, post, member and project limits; omit the Stripe key and it drops into self-host mode with everything unlimited. Media uploads are presigned straight to S3/MinIO so bytes never transit the API, then content-sniffed with sharp on completion. Auth is passwordless magic-link (better-auth) with optional Google OIDC. Provider tokens live in an append-only encrypted vault — rows are inserted on refresh, never updated, and never stored on the channel row. Operationally it ships liveness and readiness probes, pino structured logs with secret redaction and request IDs, opt-in Sentry, Redis-backed rate limiting, Zod env schemas that fail fast at boot, and a production guard that refuses to start with dev secrets. Tests: 65 unit files, 19 integration suites against real Postgres/Redis/MinIO/Mailpit, and 5 Playwright journeys covering auth + tenancy, connect + publish, approvals, failure review, and billing limits. Ideal for founders launching a niche or vertical scheduling tool, agencies running client social calendars under one roof, teams that want first-party control of their social tokens instead of renting a SaaS seat, and developers who want a genuinely production-shaped queue, tenancy and OAuth codebase to learn from.

A full multi-application platform for New Zealand offers, coupons, cashback, merchant management, admin operations, and mobile discovery. The repo ships as a pnpm + Turborepo monorepo with a NestJS API backed by Prisma, PostgreSQL, and Redis; a consumer-facing Next.js web app; dedicated admin and merchant portals; an Expo React Native mobile app; and shared packages for typed API access and DTOs. It includes tracked redirects, coupon copy tracking, cashback activation, wallet and referral foundations, notifications, wishlist flows, sponsored listings, premium subscription surfaces, and merchant tooling. The mobile app uses Expo Router and TanStack Query, while the web experience uses Next.js 16 and shared typed API client packages. The platform is especially useful for founders building a regional rewards marketplace, affiliate coupon platform, or cashback network with separate consumer, merchant, and admin surfaces in one codebase.

A clean invoicing and billing dashboard built as a React 19 + Vite single-page app with a premium finance-oriented UI. It includes a collapsible sidebar shell, dashboard stats, recent invoice table, invoice builder flow, client management placeholder, payment tracking view, and settings surface in one polished front-end package. The builder supports invoice metadata, line items, subtotal/tax/total calculations, notes, toasts, and a clear handoff path for future PDF export or API integration. The UI layer is built with Tailwind CSS, Radix UI, and shadcn/ui, with typography and token choices tuned for modern back-office dashboards. The app also ships with React Router, TanStack Query, React Hook Form, Zod, Vitest, and Playwright, making it a strong starting point for freelancers, agencies, internal finance tools, and startup billing dashboards that need a solid front-end foundation fast.