Civil Billing & Engineering Workflow Automation
Engineering-grade billing automation for civil engineering firms
Problem Statement
Civil engineering billing is structurally complex. Projects span months or years, involve multiple sub-scopes, and require progress billing that reflects contract terms, effort allocation, and phase-specific deliverables.
Most firms rely on manual workflows: exporting time entries from timekeeping systems, organizing them by project and sub-project in spreadsheets, calculating billing summaries, and cross-referencing contract terms before generating invoices. This process is time-intensive, error-prone, and difficult to audit.
QuickBooks Online—while widely used—lacks native engineering billing logic. Its progress invoicing features are limited, and QuickBooks Time integration does not automatically align time data with engineering contract structures. The result is a recurring administrative burden that creates bottlenecks during billing cycles.
Solution & Approach
The platform bridges QuickBooks Online and QuickBooks Time, applying engineering-specific logic to transform raw time data into structured, reviewable billing summaries.
The system prioritizes clarity and auditability over feature density. Every calculation is traceable, and every summary is designed to be reviewed by a person before becoming an invoice.
Technical Stack
Languages & Frameworks
TypeScript, Node.js, React, Next.js
APIs & Integrations
QuickBooks Online API, QuickBooks Time API, OAuth 2.0
Infrastructure
Vercel, PostgreSQL, secure token management
Development Approach
API-first design, structured data models, audit-focused architecture
Impact & Outcomes
The platform replaces hours of manual reconciliation with a repeatable, auditable workflow. Billing cycles that previously required extensive spreadsheet work now occur in minutes, with fewer errors and better documentation.
Engineering principals can review billing summaries in a clean, structured format before approving invoices. This improves accuracy, reduces billing disputes, and maintains the professional standard expected in client relationships.
What this demonstrates: Systems thinking applied to operational problems, API integration expertise, understanding of real-world accounting constraints, and the ability to design tools that solve specific professional pain points without over-engineering.
Skills Demonstrated
Links
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