Case study · App tier

Operating Resilience Lab
60-month cash engine in the browser

A finance and operations planning tool that runs a full liquidity model client-side — revenue ramp, NDR, hiring productivity, event shocks, scenario comparison, and exportable board memos. No backend, no signup.

TierApp — custom web app
DomainFinance & ops planning
StackVanilla JS · CSS · HTML

The problem

Finance and ops leaders stress-test runway, hiring plans, and revenue paths in spreadsheets that break under scenario changes. They need a responsive UI that recalculates instantly when assumptions shift — without exporting to Excel or waiting on a server round-trip.

The bar was App tier: non-trivial domain logic, polished multi-panel UX, printable outputs, and shareable state — all in production-quality code a prospect could inspect before signing a SOW.

What we built

  • Calculation engine — 60-month horizon with revenue ramp or compound growth, NDR + new MRR, cash waterfall, and hire productivity ramp
  • Event timeline — five configurable shock slots (fundraise, layoff, product launch, etc.) with month-level impact
  • Scenario A/B — side-by-side comparison with instant recalc on any input change
  • Multi-panel UI — profile, liquidity path, capacity, tech concentration, buffer posture, and memo export
  • Knowledge base — glossary and methodology docs integrated into the tool, not a separate PDF
  • Shareable state — URL-encoded state for async review; printable report for board prep

Results

Sub-second recalc on a 60-month model with five event slots — verified in browser devtools with zero network requests after load. The tool serves as the primary App tier proof on timelee.com: prospects open it, change assumptions, export a memo, and understand exactly what "custom web app" means before the first sales call.

Featured on the platform hub and linked from App tier service pages as the live demo reference build.

Similar build?

Need a custom tool with real domain logic?

Dashboards, calculators, portals, and integrations — scoped in a written SOW with fixed timeline and USD range.