Custom accounting software for firms and finance teams: automated bookkeeping and reconciliation, jurisdiction-aware tax logic, real-time financial dashboards and immutable audit trails, built to support GAAP and IFRS reporting.
What App369 Delivers
01
The system can handle multi-currency transactions and sync with bank feeds in real time.
02
Jurisdiction-aware tax calculation modules supporting federal, state, and international tax codes.
03
Real-time P&L, balance sheet, and cash flow dashboards with drill-down capabilities.
04
Supports corporate card integration and mileage tracking.
05
Automated intercompany elimination and multi-entity financial consolidation for enterprises managing subsidiaries across jurisdictions.
06
Immutable, timestamped logs of every financial transaction and user action.
How it works
Short sprints with a working demo at the end of each one mean you see progress early and can change priorities before they become expensive.
Simon analyzes your vision, goals, and competitive landscape to craft a solution roadmap. This phase typically runs 1-2 weeks and defines the full project scope.
Intuitive UI/UX crafted with interactive prototypes. Prototypes let you test the flow with real users before any code is written.
Expert engineering using Flutter, Vue.js, Node.js, and GCP in 2-week Agile sprints with weekly milestone demos for full transparency.
Reliable deployment with crash and uptime monitoring and ongoing maintenance. Maintenance plans run during business hours, Monday to Friday.
Questions
A dual-standard architecture maps chart of accounts and journal entries to both GAAP and IFRS frameworks. The system applies the correct recognition and measurement rules based on entity configuration. We also include built-in validation checks that flag entries deviating from the selected standard before they are posted.
Yes, we build integration layers using REST APIs and middleware connectors that sync data bidirectionally with SAP, Oracle, NetSuite, and other ERP platforms. Our integration approach ensures real-time data consistency across systems while preserving existing workflows and approval hierarchies.
Custom platforms enable live dashboards showing cash position, revenue recognition, and expense breakdowns updated to the minute. We implement streaming data pipelines that pull from bank feeds, payment processors, and sub-ledgers simultaneously, giving CFOs an always-current financial picture.
Cloud accounting platforms built on GCP or AWS benefit from SOC 2 Type II certified infrastructure, automated security patching, and encryption at rest and in transit. We implement role-based access control, MFA, and IP whitelisting to ensure that sensitive financial data remains accessible only to authorized personnel.
Live demo
Concept sites App369 designed and built for made-up businesses in this field. Not client work. Open one on your phone and click around.
Concept2026Concept site by App369, not a client project
Concept accounting firm website
A CPA firm for Miami small businesses, in English and Spanish. A monthly price builder for bookkeeping, payroll and returns, a 2026 federal and Florida tax-deadline calendar you can download, and call booking.
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Your Development Partner
I build every accounting software development project myself, with Flutter and Firebase, and I personally ensure every project meets the highest standards.
Fixed scope, fixed price, paid upfront. The work happens in writing; no call needed.
