HermesHelm

Accounting software tells you what happened. HermesHelm sits one layer up and helps a solo founder decide what to do about it. It’s built for people who run a business and a life through the same bank balance, and who need a decision tool, not another wall of charts.

What it does#

• One financial picture. The full territory of a one-person operation, business and personal, brought into a single decision-oriented view.
• Australian by design. PAYG, tax set-asides and deductions are modelled properly rather than bolted on as an afterthought.
• Real breadth. Around 40 domain modules, running from transaction ingestion through to long-range forecasting, with AI doing the reading and organising quietly in the background.

Why it matters#

Forty-odd modules in one codebase is where architectural discipline stops being a preference and starts being survival. HermesHelm is a TypeScript monorepo with hard module boundaries on the NestJS side, background work pushed through proper queues, and the kind of domain separation that lets a tax rule change without a forecasting regression. Financial software also raises the stakes on correctness: this is a domain where a rounding error is not a cosmetic bug, so the boring rigour is the feature.

The stack#

Next.js 14 on the front, NestJS with Prisma and PostgreSQL 16 on the back, BullMQ and Redis for background jobs, Clerk for auth, Stripe for billing, Cloudflare R2 for storage, and Anthropic Claude behind the AI layer.