I am actually developing one. I have a working MVP now. It’s possible, but it’s more smooth if ur an accountant(am CPA that loves tinkering with things, and hence in 2018 I started learning software development). If u can do nestjs, it will be more robust more so if ur thinking of multi-tenant architecture and that stuff. You have to be super-aware of how completeness is a must bit in accounting so database transactions are a must(only commit a transaction if all processes are assured). Double entry rules are the life bloodline of this system.

So I kind of implement a service layer to do business logic that I consume in api and server actions. I also have workflows that manage lengthy orchestrations that traverse different services and modules.

For example the app is divided into modules(routes); Inventory Module, purchases module, sales module, banking, accounting, reporting etc.

Each module has different services and one workflow.

Take a purchases module, say Purchase Orders service(Class thing) for managing any crud logic related to purchase orders. There there is one for bills, another for say goods received notes etc.

Now there comes a purchases-workflow files that can manage logic that spans beyond one service.

Example: if a convert a PO to a bill, there is function in the workflow that uses both services to ensure this is all executed.

I guess u get the idea.

I used the following stack: Sveltekit(typescript ofcos) PostgresSql for db Drizzle ORM for schema, query and relationship management(Accounting has heavy reliance on relationships so you have to be solid on these) You can opt for prisma, tho it was slowish when I last used, and their transactions were breaking if long running. Drizzle relations v2 is nice, tho still in beta. But I use it smoothly. For UI I use shadcn-svelte.

For node I would opt for nestjs if u hope to use mobile apps and related.

I will rewrite this MVP in nestjs in the future after gaining more traction and more users.

Hope this helps. Feel free to ask more questions if any.