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📰 Dev.to · Lith SEO

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Building FoxyInvoice — Chapter 4: Multi-tenancy & data security — the vault

Dev.to · Lith SEO ⚡ AI Lesson 2h ago

Building FoxyInvoice — Chapter 4: Multi-tenancy & data security — the vault

How a thousand tenants share one database and never see each other's data — enforced by query filters, and proven by tests in CI.

Building FoxyInvoice — Chapter 3: Architecture — one codebase, two products, boring on purpose

Dev.to · Lith SEO 1d ago

Building FoxyInvoice — Chapter 3: Architecture — one codebase, two products, boring on purpose

The boring-on-purpose architecture behind two products in one codebase: Angular, .NET, Postgres, a worker, and a rude Money type.

Building FoxyInvoice — Chapter 2: Product thinking — pick a real problem, price it, position it

Dev.to · Lith SEO 1d ago

Building FoxyInvoice — Chapter 2: Product thinking — pick a real problem, price it, position it

How we picked invoicing as a market, read competitors as free research, and priced a free tier we can honestly keep.

Building FoxyInvoice — Chapter 1: Every term you need, and where it will bite you

Dev.to · Lith SEO 1d ago

Building FoxyInvoice — Chapter 1: Every term you need, and where it will bite you

Git, UI vs UX, databases, HTTP & APIs, Docker, DNS & TLS — each taught through a real production incident from a live SaaS.

Building FoxyInvoice — Chapter 0: We built an invoicing SaaS, and you can too

Dev.to · Lith SEO 1d ago

Building FoxyInvoice — Chapter 0: We built an invoicing SaaS, and you can too

The introduction to a complete build-in-public series: design, build, ship, secure, operate, and grow a real multi-tenant SaaS — with the postmortems included.